64 NEW-YORK FAUNA 



CRUSTACEA 



ORDER X. OSTRAPODA. 



Body small, enclosed between two lateral valves. No distinct head. A single compound 

 sessile eye. Feet formed for walking. Mandibles bearing palpi. Antenna long, seta- 

 ceous, and terminated by a fasciculus of hairs. 



GENUS CYPRIS. Muller. Straus. 



Shield opening and closing like the valves of a bivalve mollusk. Tail soft, reflected on itself, 

 and with two filaments at its extremity. Feet three pair. Eye large and spherical. 



Obs. This genus appears to be very numerous, upwards of twenty species having been 

 more or less well characterized. It has also been noticed in a fossil state. 



Cypris HISPIDA. 



PLATE X. FIG. 48, 49 (Magnified). 

 (STATE COLLECTION.) 



Description. Valves, when viewed together, resemble a minute Modiola. Epidermis 

 uniform jet black, and covered with numerous whitish rigid hairs. 



Length, O'09-O-l. 



I have never had an opportunity of examining this species alive. It appears to be allied to 

 the Monoculus puber of Jurine (Hist, des Monocles, p. 171), in its hirsute appearance ; but 

 it has neither the color, nor the two parallel oblique bands attributed to that species. My 

 specimens were obligingly communicated by Dr. Budd, from the neighborhood of Lake Cham- 

 plain. I have seen others from Hoboken, New- Jersey. 



