198 CLASS CRUSTACEA. 



straight intestine, which occupies the whole length of the 

 abdomen, accompanied on the right and left by glandular 

 lobes, appearing to hold the place of the liver. An appen- 

 dage, in the form of a branch, adhering to the internal base of 

 the last pair of feet, appears to characterize the male indi- 

 viduals. 



The teguments of the stomapods are slender, and even 

 almost membranaceous or diaphanous in many. The testa 

 or carapace is sometimes formed of two bucklers, the ante- 

 rior of which corresponds to the head, and the other 

 to the thorax, sometimes of a single piece, but free be- 

 hind, leaving usually uncovered the thoracic segments, bear- 

 ing the last three pairs of feet, and having an articulation in 

 front, serving as a base to the eyes, and to the intermediate 

 antennae. These last organs are always extended, and ter- 

 minated by two or three threads. The eyes are always inter- 

 approximate. The composition of the mouth is essentially 

 the same as that of the decapods ; but the palpi of the mandi- 

 bles, instead of being couched upon them, are alwaiys raised. 

 The jaw-feet are without any whip-like appendage, such as 

 they present in the decapods ; they have the form of claws or 

 small feet, and in many at least (the squilla)) their external 

 base, as well as that of the two anterior feet, properly so 

 called, presents a vesicular body ; those of the second pair, in 

 the same stomapods, are much larger than the others, and 

 than the feet themselves ; accordingly, they have been con- 

 sidered as genuine feet, and fourteen have been reckoned. 

 The four anterior feet have also the form of claws, but ter- 

 minate, as well as the jaw-feet, in a talon, or by a hook, which 

 is bent at the side of the head, over the inferior and anterior 

 edge of the preceding articulation, or the hand. But in some 

 others, such as phyllosoma, all these organs are filiform, and 

 without forceps ; some of them, like the six last, and equally 

 simple ones of the stomapods, provided with claws, have an 

 appendage or lateral branch. The last seven segments of the 



