of the North Atlantic and of North- Western Europe. 697 



cells at posterior angle of right valve there is a similar group near the front of its 

 ventral margin ; the dorsal gland-cells are wanting, but there are groups of such 

 sacs (two on the right valve and three on the left), close to the posterior spinous 

 extremity of the shell ; abdomen conically elongated ; armature of mandible as 

 in Conchoecia, but with an unusually large transverse toothed ridge, and four 

 long curved teeth. 



The few specimens which we have seen, belonging to this genus, were in poor 

 condition, and did not admit of our verifying some of the characters ascribed to it 

 by Dr. Claus, more particularly those relating to the gland cells, which we have 

 not seen. But the very characteristic and remarkably formed shell is of itself 

 sufficient to constitute a good generic feature. 



1. Conchoeeilla daphnoides, Claus. 

 (PI. Lxiv., fig. 22.) 



1890. Conchoecilla daphnoides, . Claus, " Die Gattungen und Arten der mediter- 



ranen und atlantischen Halocypriden," p. 18. 



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



Oceans und Mittelmeeres," p. 68, pi. xv. 



Shell almost flat dorsally, much elongated, height very small, but valves 

 outstretched and almost wing-like ; ventral margin arched, bending upwards 

 behind, and meeting the dorsum at an acute angle ; anterior margin narrow, 

 convex, and forming a sharply angular sinus at its junction with the long rostrum, 

 which is longer on the left valve than the right ; each valve bears at the long, 

 pointed, posterior extremity a series of marginal spinules, the right valve being a 

 good deal the longer of the two. Length, 2'85 mm. 



We found a single specimen of this species amongst material taken by 

 Professor Haddon in the deep tow-net (200 fathoms) 40 miles ofP Achill Head, 

 Ireland. This specimen we have here figured, but our descriptive details are 

 taken from Dr. Claus's monograph. 



Distribution. — Young specimens were taken by Claus in lat. 37° 45' N., 

 long 13° 38' W., and in lat. 34° 18' N., long. 15° 34' W. 



2. — Conchoecilla lacerta, nov. sp. 



(PI. Lxn. fig. 1-4; Lxv., fig. 1-10.) 



Shell, seen from the side, much compressed and greatly elongated ; greatest 

 height situated in the middle, and equal to one-fifth of the length ; anterior 



