ORTMANN: CRUSTACEA OF SOUTHERN PATAGONIA. 645 



In the female the claspers are very short, stout, straight, slightly taper- 

 ing and suddenly truncated at the end, with the outer margin produced 

 into a short spine. Ovisac very long, two thirds as long as the abdomen, 

 reaching to the penultimate abdominal segment; its end pointed. 



Caudal appendages, in both sexes, rather long, about twice as long as 

 the terminal segment. 



Length of body (in male and female), about 15 mm. 



Remarks. — I had drawn up the above description, before I became 

 acquainted with von Daday's paper. After having seen the latter, I was 

 at once convinced that our specimens belong to this species, although my 

 description does not agree completely with that given by von Daday, 

 But this seems to be due to a different interpretation we have given to 

 the microscopic image, and after a renewed examination, I do not see 

 any reason why I should alter my original account. 



The description of B. iheriugi, given by Lilljeborg, applies in some de- 

 gree, as far as it goes, to our species. Lilljeborg says that there are a few 

 small spinules on the inner side of the first joint of the male claspers, and 

 that the second joint has, at the apex, a tubercle on the posterior margin, 

 and a tuberosity on the anterior side. While this structure appears to be 

 similar to that found in our species, the spinules of the first joint are, in 

 the latter, represented rather by a denticulate crest, and, further, Lilljeborg 

 does not mention the peculiar laminate form of the second joint, which, in 

 our species, has no tubercles or tuberosities at the apex, but rather lamel- 

 liform lobes. (The peculiar shape of this joint is, in my opinion, not quite 

 correctly understood by von Daday.) Finally B. iheyingi is smaller than 

 our species, only 8 mm. the 9, 1 1 nim. the cj^, while B. gyamdosa attains, 

 according to our material, 15 mm., and according to von Daday 15-18 

 mm. Thus B. granulosa seems to be different from B. iJieriiigi, although 

 closely allied to it. 



Order ISOPODA. 



Family JANIRID^ Sars. 



LVIS Bovallius. 



Iais pubescens (Dana). 



1891 /. /., Dollfus, in: Miss. Cap Horn, v. 6, p. 70, pi. 8, f 13. 

 1900 /. /., Stcbbing in : Pr. Zool. Soc, p. 549, pi. 38. 



