no. 1701. NORTHWEST PACIFIC ISOPODS— RICHARDSON. 



91 



Twenty-three specimens, both males and females, were collected 

 by the U. S. Bureau of Fisheries steamer Albatross at stations 5023 

 and 5024, off eastern coast, Saghalin Island, vicinity of Cape Pa- 

 tience, in Okhotsk Sea, at Flat Hill, N. 53° W., Cape Patience, 

 S. 77° W. (lat. 48° 43' 30" N.; long. 145° 3' E.), and N. 48° W.; 

 Cape Patience, S. 74° W. (lat. 48° 43' 10" N.; long. 144° 53' 30" E.). 



This species differs from T. alascensis Richardson a in the shape of 

 the terminal segment of the abdomen, which is truncate and not 

 acutely triangular, in the shorter outer branch of the uropoda, in the 

 broader body, and in the tuberculate character of the surface of the 

 body. It differs from T. convexus Richardson b in the position of the 

 eyes, which are placed in the posterior half of the head, and not in 

 the middle as in T . convexus, in the shorter antennas, in the differently 

 shaped abdomen, the broader body and 

 the tuberculate character of the sur- 

 face of the body. It differs from both 

 species in the shape of the eyes, which 

 are semi-lunate or kidney-shaped. 



Type -specimen. — Cat. No. 39505, 

 U.S.N.M. 



Genus SPH^EROMA Latreille. 



SPH^ROMA SIEBOLDI Dollfus. 



Sphceroma siebohli Dollfus, Notes from the 

 Leyden Museum, vol. 11, pp. 93-94, pi. 5, 

 fig. 3a-3b. 



Locality. — Hakodate, J apan. 

 Depth Surface FlG- 16, — Te cticeps renoculis. 



" . Second leg of male. X 14|. 



The type species came from Japan. 

 The specimen, collected by the Bureau of Fisheries steamer Alba- 

 tross, differs from the type as described by Dollfus in the longer 

 first pair of antennse, which have a flageHum of eleven articles 

 instead of eight, and the longer second pair of antennae, which have 

 a flagellum of fifteen articles instead of ten. The tubercles on the 

 abdomen form two longitudinal parallel rows, one on either side 

 of the median line, not divergent rows. The other tubercles on the 

 abdomen do not appear to be arranged in rows. The tubercles on 

 the anterior part of the body are very small, hardly perceptible, 

 and not numerous. 



Hansen c does not mention this species in his list of those belonging 

 to the genus Sphceroma, but it belongs without question to this genus. 



a Bull. U. S. Nat. Museum, No. 54, 1905, pp. 276-278. 

 6 Idem, pp. 278-280. 



c Quart. Joura. Microscopical Science, vol. 49, 1906, pp. 115-117. 



