1898.] RICHARDSON — FOUR NEW SPECIES OF ROCINELA. 15 



The specimen described came from Alaska, off Unimak Island, 

 Station 32:55, 85 fathoms (U. S. Nat. Mus., No. 20088). 



Distribuiion. — One specimen was found off San Luis Obispo 

 Bay, California, Station 3195, 252 fathoms; one off Esteros Bay, 

 California, Station 3194, 92 fathoms, and another at Puget Sound, 

 Washington, Station 3067, 82 fathoms. The specimens from the 

 coast of California are smaller in size and of very much lighter color 

 than the other specimens. They are similar in other respects. Dr. 

 Hansen's type specimen is from Acapulco, Mexico, Station 3418. 

 It differs from the specimen herein described in the length of the 

 second pair of antennae, which extend to the middle of the third 

 thoracic segment, while in the specimen we have described they 

 extend only to the middle of the second thoracic segment ; in the 

 broader and longer terminal segment of the body, and in the in- 

 creased number of spines on the propodus, and the decreased num- 

 ber of spines on the merus of the prehensile legs. 



Rocifiela japonica, sp. nov. Fig. 7-9. 



Surface of body punctate and covered with black or brown dots. 

 Color yellow, marked lightly in such a way as to present a mottled 

 appearance. At the base of the terminal segment of the body, there 

 are two small spots of brown, separated by a distance equal to half 

 the width of the segment. Head subtriangular, excavated in the 

 centre between the eyes and havingthe lateral margin in front of the 

 eye produced into a lobe ; the extreme front being trun- 

 cate with rounded angles and curving slightly upward. 

 The lobe in front of the eye extends half way between 

 the eye and the extreme front. The eyes, which are 

 small, are separated by a distance of half the width of j^^^^ '^ ^-^^ 

 the head. The first antenna, with a flagellum of six 

 joints, reaches the posterior margin of the head. The second 

 antenna, with a flagellum of fifteen joints, extends to the posterior 

 margin of the second thoracic segment. 



Tlie epimera of all the segments of the thorax are acute, the pos- 

 terior angles more rounded in the first two, but sufficiently pointed, 

 in the remaining four. The epimera of the last two segments take 

 a more oblique direction than the preceding ones, and extend lat- 

 erally as far as the outer margins of the abdominal segments. 



The first abdominal segment is almost entirely covered. The 

 ■posterior angles of these segments are very acute and are produced 



