NEW MARINE ISOPODS^ — MENZIES 137 



Material exanmied.—WASumGTtm ' : Sa^i Juan County, Turn Rock, 

 Turn Island, July 4 and 7, 1940, under rock at low tide (F. A. Pitelka) , 

 2 females, one ovigerous. California «: Monterey County, Point 

 Pinos, Jul'y 4, 1947, under submerged rock (John Davis), 1 ovigerous 

 female. 



OTHER SPECIES ASSIGNED TO JANIRALATA 



In addition to the species already discussed, several others appear 

 from their descriptions also to belong in the genus Janiralata. The 

 s]3ecies for which the generic assignments are fairly certain are lolella 

 alascensis Benedict, 1905 (Richardson, 1905b, p. 464), Tale liohrwsi 

 Richardson, 1905 (as lolella in Richardson, 1905b, p. 4f,5) and 

 lolella sarsl Richardson, 1905b, p. 467. The following species I 

 doubtfully refer to Janiralata: lanthe erostrata Richardson, 1899 (as 

 lolella erostrata in Richardson, 1905b, p. 465), lanthe tnangulata 

 Richardson, 1899 (as lolella in Richardson 1905b, p. 462), and Jamra 

 soldatovi Gurjanova, 1933, pp. 81-82, 90. 



In my opinion, Vanhoffen's placement of the species alascensis, 

 iriangulata, erostrata, holmesi, and sarsi in Beddard's genus Janthop- 

 sis is less warranted than the placement, by other authors, of those 

 species in Janira or even in lolella. lolella {-= lanthe) and Jamra 

 both differ from Janthopsis, as Beddard points out (Beddard, 1886, 

 pp. 14-15), in having uropodal branches subequal in length to each 

 other and to the basal or peduncular joint. In Janthopsis the basal 

 joint exceeds twice the length of the longest uropodal branch. The 

 male first pleopods appear, from the figures I have seen, to differ 

 considerably from those figured for Janthopsis (Beddard, 1886, pi. 5, 

 figs. 6, 7). Further differences do exist (see Nordenstam, 1933, pp. 

 180-183) ; however, it seems unnecessary to enumerate them here. 



A KEY TO THE SPECIES OF JANIRALATA 



a ' Pleotelson witb distinct medially recurved, spinelike posterolateral angles. 

 h \ Cephalon lateral margin with a deep incision — triangulata (Richardson) 

 6 ^ Cephalon lateral margin entire. 



c\ Cephalon anterolateral angles bifurcating holmesi (Richardson) 



c\ Cephalon anterolateral areas blunt or angulate, not bifurcating. 



d\ Cephalon anterolateral areas blunt sarsi (Richardson) 



d '. Cephalon anterolateral areas angulate. 



e\ Cephalon with an elongate pointed rostral projection; spinelike 

 posterolateral angles of pleotelson slightly exceeding the posterior 

 extent of medial posterior pleotelson lobe solasteri (Hatch) 



» Spocimens lent to writer by Dr. Melville H. Hatch, Zoology Department, University of 



WashinRton, Seattle, Wash. rr^^^orcU,- r,f 



• Specimen lent to writer by Dr. Franlc A. Pitelka, Zoology Department, University of 



California. 



