638 Beady and Norman — Monograph of the Marine and Freshtvater Ostracoda 



of the caudal laminae are six, and above two ringed setae take the place of ungues, 

 ranging with the rest. 



We are unable to say in what slight respects the shell of the male differs from 

 that of the female. Among a series of dried specimens of this species from off 

 Valentia, Ireland, was a specimen larger than the rest, and larger than any other 

 that we had seen of the species. On this account, supposing it at the time to be 

 a female, it was macerated and dissected, the shell being destroyed. It was then 

 discovered that the sex was male. 



Habitat. — TheMinch; Oban, 7-20 fathoms; Lamlash Bay, Arran, N.B.; Tober- 

 mory, in the Isle of Mull ; off Valentia, Ireland (A. M. N.). Guernsey (late J. G. 

 Jeffreys, in Mus. Nor.). Ciunbrae (D. Robertson). North East Coast of England, 

 25-35 fathoms (G. S. B.). Scilly Islands ; Mulroy Lough, Co. Donegal ; and Lough 

 Swilly (G. S. B., and D. R.) 



Distribution. — Naples (G. W. Miiller). 



Fam. II.— CYPRIDINID^, Baird, 1850. 



Shell either smooth, hispid, pitted or roughly sculptured, having a deep 

 incision in front for the protrusion of the antennae ; in front of the incision the 

 anterior extremity is projected in rostrate or subrostrate form ; infero-posteal 

 corner often pouting, sometimes produced into a distinct process. Antennae with 

 secondary branch small, sometimes rudimentary in ? , in (? rarely as in the other 

 sex, but usually much larger, and formed for grasping. Mandibular foot five 

 jointed, terminating in ungues. The following limbs maxilliform, the first 

 furnished with three setiferous lobes and a small appendage; last joint of palp 

 terminating in setae and unguiform setae. Second maxilla with setose lobes, one 

 of which is also furnished with an overlapping series of strong teeth, and bevond 

 this a palp, consisting of three or fewer lobes, outside which is a large semicircular 

 setiferous, vibratory lamina. The last of these maxilliform limbs is smaller, 

 composed of setiferous lobes, four in number when all are developed, and a 

 subtriangular seta-margined, thin, vibratory lamina. Vermiform limb as usual in 

 the Myodocopa. No branchiae. Caudal laminae oval or subtriangular, armed 

 with numerous ungues. 



