696 Brady and Norman — Monograph of the Marine and Freshwater Ostracoda 



secondary branch of the antennae are of nearly equal length, and about two-thirds 

 the length of the principal seta. 



Dr. Clans records the occurrence of this species at Capri and in the Atlantic ; 

 lat. 34°, 18' N., long. 15° 34' W. 



Genus 3. Conchcecetta, Claus. 



Shell much elongated, in the female about thrice as long as high, hinder 

 margin meeting the ventral obliquely, without sculpture, without hinge-teeth ; 

 glands of the dorsal margin wanting. Tooth ridges and chewing-edges of the 

 mandible separate, both portions toothed on their free edges, the four hooked 

 teeth largely developed. 



1. Conchcecetta acuminata, Claus. 



1890. Conchcecetta acuminata^ . Claus, " Die Gattungen und Arten der mediter- 



ranen und atlantischen Halocypriden," p. 16. 



1891. ,, ,, . . Claus, " Die Halocypriden des atlantischen 



Oceans und Mittelmeeres," p. 67, pi. xiii. and 

 pi. xiv. 



Dorsal margin of the shell much longer than the ventral, and terminating in a 

 spinous process, not always found on both valves. Rostrum in the female acutely 

 pointed, in the male rounded off. Length of female, 3'2-3"4 mm. ; male, 2*3-2'4 

 mm. ; height of female, 1*2 mm. Frontal tentacle of the female straight and 

 elongated, very slender, acuminate at the apex ; that of the male stout, bowed, 

 and bent at a right angle. Antennules of the female (exclusive of setae) reaching 

 scarcely more than half the length of the tentacle; terminal seta beset with 

 hairs, and almost three times as long as the four sub-equal adjacent setse. In the 

 male the antennules reach as far as to the bend of the tentacle, the terminal 

 seta bearing twenty-four pairs of rectangularly bent, hook-like spinules, the two 

 adjacent setse about equally long. 



In depths of 500 to 1000 mfetres from the following Atlantic stations : — off 

 Cape Finisterre, between Teneriffe and Grand Canary ; and in lat. 34° 18' N., 

 long. 15° 34 W. ; also at the surface in the neighbourhood of Puerta Orotava. 



Genus 4. Conchcecilla, Claus. 



Shell much elongated, gaping, without hinge-processes, with a long, acute 

 rostral prominence, and a long spine-like prolongation of the hinder extremity ; 

 surface marked more or less with diagonal ribs or reticulations ; a patch of gland- 

 cells near the ventral margin of the right valve ; instead of the group of gland 



