1282 



CRUSTACEA. 



Family CYPRIDiE. 



The two subfamilies of Cypridae, Cyprinas and CytTwrince, are 

 mentioned on page 1280. Although agreeing in the general character 

 of the antennae, the maxillae, and the mandibles, and thus distin- 

 guished from the Halocypridae, they have many important points of 

 distinction. Part of these have already been mentioned. The cha- 

 racters of the genus Cythere will be gathered from figures 9 a to 9 I, 

 Plate 89, and those of Cypris, from Plate 90. 



In Cythere, the superior antennae are only five-jointed, and they are 

 furnished with a few naked setae. In the species examined by the 

 author, they were used somewhat like feet. The second pair are 

 more decidedly pediform, and instead of having hair-like setae at apex, 

 there are two stout finger-like spines, lying side by side, besides 

 another shorter below. The organ has four distinct joints, besides 

 the terminal spine ; and as the outer of these spines appears to have 

 an obsolete joint near its base, it probably corresponds to two normal 

 joints, like the finger in Corycaaus. In this way the full number of 

 joints, six, is made out. The spiniform lateral appendage proceeds 

 from the apex of the second joint, and therefore corresponds normally 

 to the second branch ; it is as long as the rest of the organ, and has a 

 joint towards its extremity. Very near the apex it is abruptly nar- 

 rowed, as shown in figure 9 a. The mandible is closely alike in Cypris 

 and Cythere. The palpus in each is four-jointed, and bears a branch 

 from the first of these joints, this being normally the second joint of 

 the organ, as the mandible is properly the first joint. 



Naturg., vi. 186, 1840. "Testa bivalvis corpus abscondens antice subtusque in- 

 cisa. Antennas duse simplices, apice penicillatus. Oculi duo. Pedes 4, compressi 

 subfoliacei. Fila peculiaria ad retinenda ova. Cauda compressa uncinis plunbus ter- 

 minata." This description, in the eyes, the antennae, legs, and caudal extremity, agrees 

 with the species of Cypridina, as observed by the writer ; and where it differs from the 

 description of Edwards, as in the caudal extremity, that description appears to be incor- 

 rect. The species was obtained by Philippi, at Naples, and is named A. elliptica. 



