ALASKAN ISOPiins. 



217 



process which extends outward and downward and in the last segment is triangularly produced at the 

 posterior extremity, the epimeron in each segment occupying the posterior portion of the segment. 



Tin- abdomen is composed of a single segment whose posterior margin lias a widely rounded 

 median expansion with an acutely pointed lateral expansion on either side. The uropoda are about 

 equal to the abdomen in length; the outei branch is slightly shorter than the inner; the basal joint 

 is equal in length to the outer branch. 



The legs arc all furnished with biunguiculate dactyli. The first pair is prehensile, the carpus 

 being very large and armed w itli spines along the inner margin; the propodus is serrulate along the 

 inner margin of the proximal end. 



Two specimens, both females, urn- taken by the Albatross at station 4253, Stephens Passage, 

 Southeast Alaska, and station 42l's, vicinity of Naha Bay. Behm Canal. Southeast Alaska, Depth, 

 41-lss fathoms. Type in the I". S. National .Museum, Cat. No. 29249. This species is named for Dr. 

 Samuel J. Holmes, who has done much work <>n the Crustacea of the Pacific coast. 



Fig. 5.— Tbte holmesi Richardson, new species, a. General view, ■ 11!; b, leg of first paii, female, x 33. 



ONISCOIDEA. 

 Family 0N1SCIM. 



Porcellio scaber Latreille. 



Porcellio scaber Latreille, Hist. Crust. Ins., VII. p. 45; Gen. Crust., I, p. 70. Budde-Lund, Trust, tsop. Terrestria, 1885, pp. 

 129-131. (See Budde-Lund for synonymy, i 



Localities.— Vancouver Island, British Columbia, near Union Wharf, along the shore; Taylor Day, 

 Gabriola Island, British Columbia, on the shore. 



