ORDER STOMAPODA. 
201 
Coronis, Latr . 
But a single species is known, Squilla eusebia ? Risso. 
The other stomapods of this family have the testa, as it 
were membranaceous, diaphanous, covering the whole thorax, 
folded laterally underneath, prolonged anteriorly like a sword, 
or spine, and advancing above the support of the middle 
antennae and the eyes. This support is capable of being 
bent underneath, and of being enclosed in the case formed by 
the curve of the buckler. The posterior fins are concealed 
under the last segment. 
The talons of the great claws have no teeth. The second 
articulation of the ocular pedicles is much thicker than the 
first, in the form of an inverted cone. The eyes, properly so 
called, are thick, almost globular. The fin-like appendage 
of the feet resembles that of the squillae and gonodactyli. In 
Eriohthus, Latr., Smerdis, Leach , 
The first articulation of the ocular pedicles is much shorter 
than the second. The middle of the lateral edges of the 
buckler is much protruded in the form of an angle, and their 
posterior extremity presents two teeth. ( Erichthus vitreus , 
Latr.) 
Alima, Leach. 
The^first articulation of the ocular pedicles is much longer 
than the following, slender and cylindrical. The body is more 
narrow and elongated than in Erichthus, the lateral edges of 
the buckler are almost straight, or but little dilated. Its 
middle is carinatcd longitudinally. Each of its angles forms 
a spine, of which the two posterior are the strongest. ( Alima 
hyalina , Lat.) 
The second family, that of 
