of the North Atlantic and of North- Western Europe. 693 



thick and very long, almost as long as the antenna, in the female twice and 

 a-half as long as the four sense-setae. The principal seta of the secondary branch 

 of the female antenna is scarcely longer than the longest of the four adjacent seta3. 

 The hooked appendage of the right antenna of the male is bent to a right-angle 

 at the base. 



This species is recorded by Claus from Ischia at a depth of 900 metres ; from 

 the Atlantic, lat. M° 18' N., long. 15° 34' W., depth 1000 metres, and from the 

 surface of the sea at Orotava. 



11. Conchoecia porrecta, Claus. 



1890. Conchoecia porrecta, . . . Claus, "Die Grattungen und Arten der medi- 



terranen und atlantischen Halocypriden," 

 p. 12. 



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



Oceans und Mittelmeeres," p. 61, pi. vii. 



Shell elongated, twice and a-half as long as high ; dorsal margin incurved ; 

 posterior rather strongly convex ; rostrum rather short ; no spine at the postero- 

 dorsal angle. Length, 1-6 mm. ; height, 0'65 mm. Frontal tentacle of the 

 female slender, straight and elongated, slightly dilated at the apes, and suddenly 

 tapering to an acute point ; in the male the capitulum is broadly clubbed, much 

 stouter than the peduncle, and bent at an angle. Terminal seta of the male 

 antennule armed with from forty to fifty pairs of booklets, of which the fourteen 

 or sixteen distal pairs are the stouter, and more closely packed ; those towards the 

 base being simple spine-like hairs, and set at wider intervals. Hooked appendage 

 of the right antenna of the male bent at an oblique angle. Setae of the secondary 

 branch of the female antenna short and slender; the principal seta not much 

 longer than the four sensory organs. 



Numerous examples of both sexes were found by Dr. Claus in the Atlantic, 

 from Cape Finisterre to Teneriffe, in depths varying from 1000 to 1600 metres. 



Conchcecia obtusata, G. 0. Sars. 

 (PI. Lxm., figs. 1, 2.) 



1865. Conchoecia oUusata, . . Saes, G. 0., *' Oversigt af Norges marine Ostra- 



coder," p. 118. 

 1890. Halocypris oUusata . . Saes, G. 0., " Oversigt af Norges Crustaceer. 



II. Branchiopoda, Ostracoda, Cirripedia," 



p. 53. 



Shell of the female seen from the side, elongate-ovate, equal in height before 



TKANS. EOT. DT7B. SOC, N.S. VOL. V., PAKT Xn. 5 E 



