These are clearly engineered organs, with no natural cognates. (well, " Belisarean Furnace" sounds like a combination of an adrenal gland and a spleen on crack cocaine... but not a straight up cognate.)
"Haemastamen" would require complete red-cell replacement, since red-cells lack nuclei and so you cant just change expression levels inside them. That means they are wholly artificial of they do what they say on the tin. This suggests a radical replacement of bone marrow.
"Ossmodula" sounds dumb. I dont know why they would do this. You DO know that your ribs move so that you can breathe, right? Hypoxia would be a major issue after this procedure. (Probably why they need the improved hemoglobin in the first place. This is treating symptoms caused by the enhancements.. Scales or something would have been a better solution. But this IS the imperium, after all. That still wont make up for the fact that these poor bastards are gonna have chronic chest pain from their diaphragms having to do ALL the work that normally the rib muscles facilitate. This is just a really dumb adaptation. Sorry. Also, runs the risk of developing
bone growth disorders of soft tissue. Much better to just have the chest grow some gnarly carbon fiber impregnated scales to deflect those direct blows. Less collateral consequences. But meh. If you absolutely MUST do this with bones, the better solution is to have the ribs radically increase their lateral cross-section so that they overlap like banded lamellar armor. That would give the same benefits, while still allowing said marines to you know-- bend over, lift their arm over their heads, and take deep breaths and shit. None of which they would be able to do effectively with fused rib cages.)
Larraman's Organ Another dangerous adaptation. See also, the horrible consequences from hypercoagulation
in actual human disease processes. Those with this organ implanted would be at severe risk of developing
DVTs. Occulobe This would have to be a complete retinal transplant (at the least, most likely a complete eye replacement) to work as advertised, and might be more trouble than its worth, especially in brightly lit environments. Photopigments HAVE to be activated in order for there to be a signal that reaches the brain. Those have a specific activation energy threshold, and they can (and do) become damaged by over-saturating them with photons. To react to that immediately would require cutting the CNS out of the loop, which means it is likely a whole eye replacement with fast twitch muscle controlling pupillary responses, being driven by signals generated in the retina itself. (It might be possible to trick the implants into constricting too tightly with bright, short-wavelength radiation that can be filtered by enemy combatants with appropriate headgear. This would effectively blind the marines.)
Lyman's Ear This sounds like a cochlear replacement, coupled with an auditory nerve prefilter neural network. Possible attack vector if properly studied. (Induced feedback in the prefilter network would be interpreted by the brain as a terrible, unrelenting sound. Similar to tinnitus, but worse. Since this network makes decisions on how to filter the audio, the potential for internally generated signals caused by anomalous triggers exists.)
Melanochrome Neat trick if it works properly. If it doesn't, sounds like a great way to have whole body melanoma.
Black Carapace HORRIBLE IDEA. JUST HORRIBLE. Being inorganic, it would not be easily repaired if torn or damaged. Also, the plastic would degrade inside the body, causing a whole raft of chronically malignant conditions. Better to have an upgrade to the integumentary system straight up, by adding a 4th tissue layer. That way it would regenerate itself on deep tissue injury, and not require routine invasive surgery to fix when it gets messed up. (which it would, and often.)
I am actually surprised these guys are able to lift their arms (word bro, that fused ribcage is gonna SUUUUUUCK for arm mobility!), and breath without sounding ragged and haggard, given these descriptions.