88 AET. II. — A. IZUKA : 



Habitat :—Sagami Ba}^ 31-150 fatlioms ("Albatross"); Shi- 

 kanosliima in Prov. Chikuzeii ; Misaki in Prov. Sagami. 



Genus Sthennlepis Willev. 



Both the genera Thalenessa and Leanira are cliaraeterised by 

 tlie presence of a very small tentaculum inipar growing directly 

 from prostomium without a ceratophore. The compound bristles 

 of the former belong to a variety of falcigerons type with biden- 

 tate appendages ; those of the latter are spinigerous. 



Whereas, Sthenelals and Sthenolepis are both characterised by 

 the presence of a long tentaculum impar borne upon ceratophore 

 which is provided with a pair of spatulate appendages. The 

 compound bristles of Sthenelais are falcigerons like those of Thale- 

 nessa, while those of Sthenolepis are spinigerous as in Leanira. 



Sthenolepis japoniea (Mcintosh). 

 PI. X, figs. 3—7. 



1885. T.eanirn japonica Mcintosh. "Challenger " Annel., p. 154. PI. XXII, 



fig. 3; PL XIYa, fi-s. 1, 2. 

 1905. Sthenolepis japonica, Willey, Ceylou Pearl Oyster Fisheries. 8nppl. 



Report. XXX, p. 259, PI. II, fig. 49. 



l>ody 40-55 mm. long and 3.0-3.5 mm. (bristles incl.) broad. 



Prostomium I'clatively large, and pale reddish-brown for the 

 greater part. Two xqyj conspicuous, round, black eyes situated 

 near front of prostomium just l)ohin(l tentacle ; a pale band behind 

 each eye. Anothei- pair of much smaller eyes on anterior surface 

 of snout beneath tentacle ; the pigment mass somewhat crescentic 

 in shape, prol>ably owing to the presence of a lenticular structui'o ; 



