Chestburster 1979 Drawn by David

It seems that David is investigating how to refine the creature . in theory it seems that already knows what they need and how to do , but this I think it will be a case without his knowledge, to give a touch of event, like the last sweetest strawberry at the end of the season ; it does not have the suitable material . The similarity is remarkable , as if the alien (xenomorph)  the success that he hoped . a bastard without glory. Every time we go to watch alien1979 appreciate his work

"Au Revoir Shoshanna"

There are some letters missing there: (c)rustacea, (c)hasmataspidida, (p)alpigradi, hexapoda (t)rilobita,  (t)racheata, (p)ancrustacea. I am not sure why so many missing letters in such a short scientific description and how reliable these notes can be. However it seems it's about fossil arthropods with tracheal respiration. 

The missing words are not all there is, trilobites might not even (they seems to be classified as relatives to spiders) be crustaceans. And where did David learn ancient Earth biology and why? Logic be damned, it is cool so we keep it.

So this makes it official, we will no longer have bug hunts but rather lobster hunts?

It is not impossible for David to have all available data about primitive lifeforms from Earth. However only the first letters are missing, so it might be a clue that David's symphony was off.

daliens - Thank you for the comment regarding the missing letters!

 'it might be a clue that David's symphony was off'

I agree with you, we should jump to the conclusion you mention.