STOMAPODA. 425 



These minute and ilclicate Crustacea are peculiar to tlie Atlantic Ocean and the Indian Seas. Tlie fingers of tlie 

 large claw-leg-s are not toothed. The second joint of the ocular peduncles is raucli larger than tlie basal joint, and 

 in the form of a reversed cone. The eyes themselves are large, and nearly globular. The appendages of the 

 swimming or hii-feet resemble those of the SqnUld;. 



Erichllms, Latr. (Smerdis, Leach), has the basal joint of the ocular peduncles short, and the caraija.\ dilated at 

 the sides. Type, E. ciiveus, Latr. 



Alima, Leach, has the hasal joint of the ocular peduncles much longer, the hody much narrower, with the sides 

 of the carapax not dilated. Each of its angles forms a spine, of which the two posterior are the most acute. Type, 

 A. /n/ali/ia, Latr. 



[SqiiilU-riclkiis, Edwards, has the claws of the great feet armed with spines.] 



THE SECOND FAMILY OF STOMAPODA,— 

 BiPELTATA, Latr., — 

 [Comprises (lie Glass-Crabs, wliich] have the carapa.t divided into two shields, the anterior of which 

 is very large, more or less oval, composing the head, and the second, corresponding with the thorax, is 

 transverse and angulatcd in its outline, and hears the foot-jaws and the ordinary feet. 

 Tliose feet, with the exception of the posterior pair, as well as the last pair of foot- 

 jaws, are slender, filiform, and for the most part very long, and accompanied by a 

 lateral, ciliated [short and slender] appendage. Tiie four other [anterior] foot-jaws 

 are very minute and conical. The base of the lateral antennae is not furnished with 

 a scale, and the intermediate ones are terminated by two filaments. The ocular pe- 

 duncles arc very long. The Iiody is very flat, membranous, and transparent, with the 

 abdomen small, and without spines to the posteiiiu" swimmeret. lu respect to their 

 nervous system, they ajipear to Ije intermediate between the preceding and following 

 Crustacea. 



This family comprises only the single genus P/ii/No.^-oma, Leach, of which all the species are inhabitants of the 

 Atlantic and Eastern (tceans. [M, Gucrin has published a monograph of this geuus, with figuies of all the species, 

 in his ^lagasin de Zoolofjie.] 



[^L Edwards has I'ecently added another genus, Amphlou, differing from Phyllo.^oma in its narrower body, and 

 in the carapax extending behind over the whole body, thus rendering LatreUle's name, liipidtala, inapplicaljle.] 



Those Malacostiiaca which have the eyes sessile and immoveable, form the second 

 general subdivision, [and have been collectively named Edriopthalma by Leach] . 



The [Branchiopodous genus] Branchlpus comprises the only Crustacea which remain 



to be noticed, having the eyes placed on long footstalks ; but in them the peduncles are 



j neither articulated nor lodged in cavities expres.sly for their reception, and they are 



I not only destitute of a carapax, but difter in maiay other natural characters [from the 



Podopthalmous iMalacostraca] . 



All the I\'Ialacostraca of the present [sub] division are equally destitute of a carapax. 

 i The body, following the head, is composed of a series of articulations, of which each of 

 the seven anterior ones is generally provided with a pair of feet, and of which the 

 following and terminal segments (not exceeding seven in number) form a kind of tail, 

 terminated by a swimmeret, or appendages in the shape of styles. The head is 

 furnished with four antenna, of which the two intermediate ones are sttperior ; two 

 eyes, and a mouth composed of two mandibles, a tongue, two pair of maxilla;, and a 

 sort of lip formed by the two foot-jaws, which correspond with the fourth [or inner] 

 pair in the Decajioda ; as in the Stomapoda there is no flagrum. The four outer foot- 

 jaws are transformed into feet, sometimes simple, sometimes terminated in a claw, 

 but almost always with a single finger. According to MJNl. Audouinand Edwards, the 

 two ganglionated nervous cords are perfectly symmetrical and distinct throughout their 

 entire length, and from the observations of Cuvier the Oiiisci only difter in those corda 

 not presenting the uniformity in all the segments of the body, and that there are fewer 



