NO. 1701. 



NORTHWEST PACIFIC ISOPODS—RICIIARDSON. 



115 



Fig. 36. — Janira ja- 

 ponica. Head and 

 first five seg- 

 ments of thorax. 



X 9§. 



three articles and a flagellum of about ten articles. The second pair 

 of antennae are broken at the end of the third article; there is a 

 scale articulated to the third article. 



The first three segments of the thorax are about equal in length; 

 the fourth and fifth are shorter; the last two are subequal and are 

 the longest. The lateral margin of the first seg- 

 ment has the posterior half produced in a slight 

 rounded lobe; the epimeron is situated on the an 

 terior half of the lateral margin and is in the form 

 of an angular lobe, projecting as far as the poste- 

 rior lobe of the lateral margin. The lateral margin 

 of the second segment is straight, with the ante- 

 rior and posterior angles slightly produced in a 

 lobe ; the epimeron is small, bilobed, and placed be- 

 tween the anterior and the posterior lobes. The 

 third segment has the lateral margin nearly 

 straight, with the anterior and posterior angles 

 also slightly produced in a lobe ; the epimeron con- 

 sists of two rounded lobes placed between the an- 

 terior and the posterior lobes. The fourth segment 

 has the antero-lateral margin produced in a rounded lobe; the 

 epimeron consists of a double lobe placed below this. The fifth 

 segment has the anterior angle of the lateral margin, slightly pro- 

 duced in a lobe; the epimeron consists of a double lobe just poste- 

 rior to the posterior lobe of the segment. The 

 sixth and seventh segments have the anterior part 

 of the lateral margins produced in a large lobe, 

 with the epimeron double and placed on the poste- 

 rior half of the lateral margin. 



The abdomen has the posterior margin broadly 

 triangular, the median angle and the lateral 

 angles rounded. The uropoda are about as long 

 as the abdomen. The branches are almost equal in 

 length, the outer one being but slightly shorter 

 than the inner. They are about one and a half 

 times longer than the peduncle. The first pair of 

 legs are prehensile ; the following six pairs are am- 

 bulatory and furnished with biunguiculate dactyli. 

 Only one specimen, a female, was collected at 

 station 4915, 10 to 20 miles southwest of Koshika Islands, Eastern 

 Sea, at Tsurikake Saki Light, N. 62° E., 14.8 miles (lat. 31° 31' N. ; 

 long. 129° 25' 30" E.), at a depth of 427 fathoms in gray globigerina 

 ooze and broken shells. 



Fig. 37. — Janira ja- 

 ponica. Last two 

 segments of 



THORAX AND ABDO- 

 MEN. X 91. 



Type-specimen.— Cat. No. 39520, U.S.N.M. 



