662 Beady and Norman — Monograph of the Marine and Freshwater Ostracoda 



rostrate manner ; greatest width central, equal to half the total length. Length, 

 2-2 mm. ; height, 1-6 mm. 



The antennules have the extremity of the larger set^e split into two or 

 three lashes. The antennae in the female have thirteen pulmose swimming setae, 

 which are of greater length than usual in this sex ; the appendicular branch 

 (PI. LI., fig 7), has the first joint furnished with four setae situated close together 

 near the base, and a seta at the extremity ; the second joint bears, besides the 

 usual hamate terminal seta, four lateral setae, of which the first and last are 

 longer than the two in the middle Cleft process of mandible unequally divided, 

 the upper and shorter portion setose ; masticating spines, furnished with one 

 strong lateral prong, and two or three other minute spine-like processes on the 

 distal margin; third joint of palp 3-4 times as long as broad. Vermiform Kmb 

 with only about eight spines (fig. 8). Caudal laminae bearing ten ungues, the 

 tenth strongly spined on the edge, the preceding nine finely pectinated ; from 

 near the under side of the base of each unguis there springs a group of about 

 six moderately long simple setae. The male is unknown to us. 



Habitat. — The Minch, 1866; off the South-west of Ireland, in 159, 183, and 

 722 fathoms, "Porcupine," 1869 (A. M. N.). Between Lewis and Skye, 

 70 fathoms (M'Andrew). Oban, and Cumbrae, Firth of Clyde (D. Robertson). 



Distribution. — Off west coast of Morocco, 636 metres (Marquis de Folin). 

 Fosse de Cap Breton, Bay of Biscay, 1880 (A. M. N.). 



6. Philomedes Folini, G. S. Brady. 

 (PI. LI., figs. 9, 10 ; PI. Lvi., figs. 11, 12). 



1871. Philomedes Folini, . . Brady, (i. S., " Review of the Cypridinidae of the 



European Seas," Proc. Zool. Soc, p. 294, 

 pl. xxvii., figs. 1-5, c? , ? . 



1887. ,, ,, . . Sars, G, 0., "Nye Bidrag til Kundskaben oni 



Middelhavets Invertebratfauna : iv. Ostracoda 

 Mediterranea," Archiv. for Mathem. og Natur- 

 vidskab., p. 48, jdI. iii., figs. 3, 4; pl. ix., 

 figs. 1-13. 



Shell of female (Pl. lvi., fig. 11), seen from the side, subrhomboidal ; greatest 

 height central, equal to fully two-thirds of the length; ventral margin equally 

 and moderately arcuate throughout ; dorsal much more boldly arched, the con- 

 vexity being equal from the summit of the rostrate process to the commencement 

 of the hinder margin, where the rounded declivity is more sudden; hinder margin 

 obliquely truncate, without angularity above, infero-posteal corner produced, 



