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



extremity joroduced into a very long, slightly curved, slender, acutely pointed 

 rostrum, at tlie base of which is a distinct, though shallow sinus, which passes at a 

 right angle into the narrow anterior margin ; the posterior extremity is formed by 

 a long spine-like projection, which is wide at the base, and acutely pointed 

 behind, rectilinear above and continuous with the dorsal margin below, passing 

 by a gentle curve into the ventral margin ; dorsal margin slightly curved towards 

 the front, having a distinct median indentation, but otherwise almost straight ; 

 ventral gently and evenly arcuate as far as its juncture with the posterior spine; 

 margins of the valves entire, except round the produced posterior extremity, 

 which is armed, especially on its ventral edge, with numerous adpressed, back- 

 ward-pointing spines. Surface of the shell marked, chiefly toward the hinder 

 extremity, with faint decussating striae, which form a scale-like reticulation. 

 Seen from above, the outline is much compressed, width and height about equal, 

 produced in a cuneate fashion in front, and into a long attenuated spine behind. 

 The antennule bears in the female (PI. lxv., fig. 5) one long terminal seta, and 

 four very short sub-equal sensory filaments; in the male (PI. lxii., fig. 1), are 

 three long setse, the proximal one being much longer than the rest ; two very 

 short, straight filaments, and a third, which is hook-like and curved backwards ; 

 the long, proximal seta is beset from the middle nearly as far as the base, with a 

 series of very fine, closely packed, recurved hairs (PI. lxii., fig. 2). Frontal 

 tentacle in the female very slightly clubbed, a little hispid, its tip slightly 

 produced and pointed ; in the male the capitulum is curved, blunt, and slightly 

 bulbous at the apex, dilated and truncated at the base. The basal joint of the 

 secondary branch of the antenna in the male (PI. lxii., fig. 3) has an angularly- 

 bent hook. Basal joint of the mandible-palp (PI. lxv., fig. 7) about equal in 

 length to the three following joints. Apical setse of the first foot (PL lxv., fig. 8) 

 in the female nearly equal : the last foot (PL lxv., fig. 10) has one very long 

 seta, and another about half as long. Length, 4"73 mm. 



Of this remarkable species we have seen only two or three specimens, which 

 were taken by Dr. John Murray, in H. M. S. " Triton," in 1882, lat. 60° 31' N. ; 

 long. 7° 34' W., in 580 fathoms; and in lat. 60° 20' N., long. 7° 55' W., in 200 

 fathoms, these stations being in the cold area east of the Faroe ridge in 200 

 fathoms, August 20, 1882. The size of the specimen and their general con- 

 figuration lead to the suspicion that they may, perhaps, belong to the adult form 

 of C. daphnoides, of which species no fully grown specimens have (as Dr. Glaus 

 thinks), yet been seen. But without further evidence we should scarcely be 

 justified in uniting the two forms under one specific name. 



