CBABS AND SHEIMPS. 



21Y 



destroyed. "We have two or three species, one of -wliicli 

 is adorned "with brilliant scarlet and azure paintings ; 

 but I cannot tell to which of them all this infant form 

 belongs. 



You perceive that there is a general similarity be- 

 tween these transparent little creatures, and the Zoea 

 described by Mr. Couch ; but there are great differ- 

 ences in detail. The glassy shield or carapace shoots 

 out in front in a stiff, inflexible, very fragile spine. 



ADCLT enOKE-CEAE. 



-This is perfectly straight, and nearly thrice the length 

 of the whole shield. It is beset, on various lines on its 

 surface, with short slender spinules jointed to shoulder- 

 like angles, and not serratures. Its interior is perfo- 

 rated by a canal, which dilates and narrows irregularly. 

 The carapace posteriorly is semi-oval, projecting a trans- 

 parent convex vault far over the part where the ab- 

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