214 
CRUSTACEA. 
in a straight or slightly curved compressed point. They are all 
foreign to Europe 
There, the body is extremely narrow and depressed, and the last 
segment almost square, entire, and Avithout 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 figure is falciform. 
CoRONis, Latr. 
But a single species is knoAvn f . 
In the remaining Stomapoda of this family the shell is almost 
membranous and diaphanous, covers the Avhole thorax, is curved 
laterally beneath, prolonged anteriorly into a spine or ensiform blade, 
and projects above the base of the mediate antennae 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 A'^ery small, soft Crustacea, are peculiar to the Atlantic 
Ocean and the Eastern seas. The fingers of the large claAVs 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 Squillse and Gonodactyli. In the 
Erichthus, Lidr. — Smerdis, Leach, 
The first joint of the ocvdar pedicles is much shorter than the 
second ; the middle of the lateral edges of the shield has a strongly 
angular dilatation, and their posterior extremity exhibits tAvo teeth |. 
In 
Alima, Leach, 
The first joint of the ocular pedicles is slender, cylindrical, and 
much longer than the folloAving one ; the body is narroAver and more 
elongated than that of an Erichthus : the lateral borders of the shield 
are nearly straight or are but slightly dilated ; there is a slight 
longitudinal carina on its middle, and each of its angles forms a 
spine, the two posterior of Avhich are the largest §. 
FAMILY II. 
BIPELTATA. 
In this family Ave find the shell divided into tAvo shields, the anterior 
* Squilla scyllariis, Fab.; Rumpli. Mus., Ill, F; — Squillu chirmjra, Fab.; 
Desmar. Consid., XLIII. See the article Squille, of the Encyclopedia Mdtbodique. 
-[■ See Encyclop. Method., art. Squille.- Sqtdlla tusehiu ? Risso. 
t Erichthus vitreus, Lat. See art. Squille, Atl. d’Hist. Nat. of the Encyclop. 
Method., pi. cccliv ; and Desmar. Consid., XLIV, 2, 3. 
§ Alima hyalina, Lat., Encyclop. Mf'thod., art. Squille, and Ibid. Atl. d’Hist. 
Nat., CCCLIV, 8; Desmar., Consid,, XLIV, 1. 
