STOMAPODA. 83 



tion of the abdominal segments, the last ones excepted, are 

 smooth(l). In the 



GoNODACTYLTJS, Lat., 



The groove of the penultimate segment of the large claws is wi- 

 dened at its extremity, presenting neither dentations nor spines. 

 The finger is dilated, or resembles a knot near its base, terminating 

 in a straight or slightly curved compressed point. They are all 

 foreign to Europe(2). 



There, the body is extremely narrow and depressed, and the last 

 segment almost square, entire, and without dentations or spines. 

 The lateral appendage of its last six feet is in the form of an almost 

 orbicular and slightly bordered palette; the antennae and feet are 

 shorter than in the preceding; the penultimate segment of the large 

 claws has its inner margin fringed with numerous cilia in the form 

 of little spines: the finger is falciform. 



Coronis, Latr. 



But a single species is known(3)> 



In the remaining Stomapoda of this family the shell is almost 

 membranous and diaphanous, covers the whole thorax, is curved la- 

 terally beneath, prolonged anteriorly into a spine or ensiform blade, 

 and projects above the base of the mediate antennas and of the eyes. 

 This base or support is susceptible of being curved under and en- 

 closed in the case formed by the curvature of the shield. The pos- 

 terior fins are concealed under the last segment. 



These very small, soft Crustacea are peculiar to the Atlantic 

 Ocean and the Eastern seas. The fingers of the large claws have 

 no teeth; the second joint of the ocular pedicles is much larger than 

 the first, and has the figure of a reversed cone; the eyes properly so 

 called are large and almost globular; the fin-like appendage of the 

 feet resembles that of the Squillas and Gonodactyli. In the 



Erichthus, Latr. Smerdis, Leach, 



The first joint of the ocular pedicles is much shorter than the 

 second; the middle of the lateral edges of the shield has a strongly 



(1) For the other species, see the article Squille, and pi., of the Encyc. 

 Method.; Desmar., Consid. In pi. XLII, he has given a detailed figure of the 

 Squille queue-rude. 



(2) Squilla scyttarus, Fab.; Rumph., Mus., Ill, F;Squilla chiragra, Fab.; 

 Desmar. Consid., XLIII. See the article Squille, of the Encyclopedia Metho- 

 dique. 



(3) See Encyclop. IVfethod., art. Squille. Squilla euseUa? R'issq. 



