Pacific Coast of North America. 



173 



Fig. 7. 



All the epimera are long and narrow and more or less rounde 1 

 posteriorly; they extend fully to the posterior angle of their 

 corresponding segments, a character 

 not found in any other species of the 

 genus. 



The first abdominal segment is 

 partly covered at the sides by the 

 last thoracic segment. The first five 

 segments are about equal in length 

 and width. The terminal segment 

 is slightly wider than long, equal in 

 length to the other abdominal seg- 

 ments taken together, is impressed at 

 the base, and posteriorly rounded. 

 The uropoda are longer than t!ie last 

 abdominal segment. Both branches 

 are similar in shape and size ; they 

 are oar-like, witli truncately rounded Anilocm occidentalis. x 4. 

 extremities. 



The legs increase slightly in length. The basis of all the 

 legs is carinated on the inferior margin. 



Colour a light brown, marked witli numerous black dots 

 over the whole surface of the body, with the exception of the 

 posterior half of the last abdominal segment and the ianer 

 branch of the uropoda, which are a light clear yellow without: 

 spots. The outer branch of the uropoda, which is almost 

 black, contrasts in a marked degree with tlie light inner 

 branch. In the caudal segment the change from the darker 

 to the lighter half is graduated, making the contrast less 

 marked. 



Two individuals of this species were taken: one by the 

 U.S. Fish Commission steamer 'Albatross,' station 3138, at 

 a depth of 19 fathoms, and one by Dr. D. S. Jordan, both at 

 Monterey Bay, California. One was imperfect. 



Type. No. 22567, U.S. N. M. Monterey Bay. Depth 

 19 fathoms. 



When compared with A.lcevis, Miers^, from Peru, this 

 species diifjrs in the shape of the anterior portion of the head, 

 which in A. Icevis is narrowed and rounded, while in A. occi- 

 detitalis it is truncate; in the greater length of the first 

 thoracic segment and the equality in length of the succeeding 

 segments in A. occidentalis, while in A. luivis the sixth seg- 

 ment is the longest, the others being of nearly equal length; 

 in the length of the epimera, which in A. occidentalis attain 



• Proc. Zool. Soc. London, 1877, p. 672, pi. Ixviii. fig. 6. 

 Ann. (Sc Mag. N. Hist. Ser. 7. Vol. iv. 13 



