STOMAFODA. 209 



CEYPTOPUS, 



Asnbovoid intlated shell, curving downwards on the sides, enve- 

 loping tin- l)ddy as well as the antenna? and feet, exhibiting beneath 

 a mere longitudinal fissure. The eyes are separated, and the feet in 

 tin- form of thongs, with a lateral appendage*. 



There tin- eyes are concealed ; tin- intermediate antennae are coni- 

 cal, inarticulated, and very short; the laterals are composed of a 

 peduncle, and a thread without any distinct articulations. There is 

 no at least salient scale at their base. Such is the 



MULCION, Latr. 



The body is soft and thorax ovoid. The feet are in the form of a 

 thong-, and most of them have an appendage at their base; the fourth 

 pair is the longest. 



* I know hut one species, the Mulcion Lesueurii, which was 

 captured by that zealous naturalist in the seas of North America. 

 The late Olivier, in the Pinna marina, found a crustaceous 

 animal very similar at the first coup d'oeil to the Lesueurii, 

 Imt the specimens were so much injured that it was impossible for 

 me to study their characters. 



Tin- Xehali.-v, which we at first placed in this section, having no 

 natatory appendages under the last segments of their body, and their 

 he'inu- tolerably similar to those of a Cyclops, will pass with the 

 C'ondylura into the order of the Branchiopoda, at the head of which 

 they will stand. The Nebaliae, by their very prominent eyes, which 

 seem to be on pedicles, and by some other characters, appear to con- 

 ii' rt the Sehi/opoda with the Branchiopoda. 



ORDER II. 



STOMAPODA. 



The hranehi;r ot th. Stomapoda are exposed and attached to the 



five pair- iominal appendages, exhibited to us by that part of 



the hody, called tail, in the Decapoda, and which here, as in most of 



fitted for natation, or are fin-feet. Their shell is 



ied into two portions, tin* anterior of which supports the eyes and 



intermediate antennae, or composes the head, without giving origin to 



the foot jaws. These organs, as well as the four anterior feet, are 



frequently approximated to the mouth on two lines that converge 



i/ptofHi D^frtmcii, Latr., from the Mediterranean. 

 VOL. in. P 



