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



and behind, greatest height somewhat less than half the length and situated in the 

 middle ; superior margin nearlj^ straight ; inferior moderately arcuate ; posterior 

 extremity obtusely rounded, prominent in the middle, obtusely angulated above, 

 rounded o£E below ; anterior extremity more than usually prominent below the 

 rostrum, which is sub-acuminate and deflexed, antennal sinus narrow and directed 

 forwards. Seen from above the outline is almost equally broad at both extremities, 

 greatest width much less than the height, and equal to about one-third of the 

 length, extremities obtusely acuminate. Valves delicately striated (Sars), 

 but not reticulated ; colour, pale yellowish. Frontal tentacle sublanceolate, 

 capitulum more dilated than that of 0. elegans. Antennules as in C. elegans. 

 Swimming branch of the antennae eight- jointed, the last joint very small. 

 Caudal laminae small, like those of C. elegans, except that the seven claws gradu- 

 ally decrease in length backwards. Male unknown. Length of the female, 2 mm. 



Very rare at the head of the Fekke Fiord, Norway, in rather shallow water ; 

 and in Trondhjem Fiord in 40-50 fathoms. 



Professor Sars has kindly supplied us with a few specimens of this very scarce 

 species, but not in a condition to allow of their being accurately figured or of 

 the soft parts being fully made out. We have therefore transcribed his original 

 description, giving only two outline figures drawn from the best preserved of our 

 specimens. The second figure does not quite accurately agree with the description 

 of Professor Sars, but this may perhaps arise from a slight gaping of the valves. 



In a more recent work Sars has expressed the opinion that this species ought 

 to be transferred to the genus Halocypris, a view which we ai'e unable to adopt, as 

 it seems to diverge in many important points from the character of that genus, 

 as indicated by himself and Dr. Claus. 



The shell is not very short nor rounded, nor is the rostrum particularly short 

 or obsolescent as in Halocypris ; the female antennules agree with those of 

 Conchmcia ; the basal parts of the antennae and of the mandible-palps ai'e as long as 

 those of the similar organs in Conchoecia, and not very short as they ought to be 

 in Halocypris. Lastly, a striking character given by Dr. Claus as belonging to 

 Halocypris is here absent, namely, the lancet-shaped dilatation of the principal 

 seta of the secondary branch of the antenna. 



Genus 2. Paeaconchcecia, Claus. 



Shell scarcely different from that of Conchoecia, but very delicate, much com- 

 pressed, and usually furnished with a spinous projection at the hinder end of the 

 rio'ht valve ; chewing portion of the mandible forming a triangular-toothed plate, 

 which extends over the entire width of the limb, the four hooked teeth depi'essed 

 towards the side, and enveloped in a more or less dense tuft of setae. 



