NEW MARINE ISOPODS MENZIES 123 



Family PARASELLIDAE 

 Group lANlRlNl Hansen, 1916 



The group lanirini is represented in northern California by a num- 

 ber of genera. This report includes only the species belonging to a 

 new genus Janiralata^ although remarks are necessary concerning cer- 

 tain related genera. 



Many of the northern California representatives of the group lani- 

 rini were previously placed in the genus lolella Richardson. Al- 

 though I consider lolella ^ a valid genus, so far as I know it is not 

 represented on the Pacific coast of North America. The records of 

 species of Janira (auct. lanlra) from the Pacific coast of North 

 America and Canada are also subject to question. The species re- 

 corded as Janira occidentalis Walker by Richardson (1905b, p. 472 

 and synonyms), Stafford (1913, pp. 183-185), and Hatch (1947, p. 

 172) belong in the new genus described in this paper. The speci- 

 mens reported by Hatch (1947, p. 171) as the European species Janira 

 maculosa Leach have been personally examined and in my opinion 

 belong in the genus laniropsis G. O. Sars. The same is probably true 

 of specimens reported by Fee (1926, p. 21) as Janira maculosa Leach, 

 although I have not seen Fee's specimens. As yet I have seen no 

 representatives of the genera lolella or Janira, and I consider the 

 Pacific coast species referred to those genera, by earlier writers, as be- 

 longing in the genus Janiralata. 



Owing to the inadequacies of the descriptions of many of the de- 

 scribed species it has naturally been impossible for me to assign with 

 certainly all the species herein referred to Janiralata. Certain spe- 

 cies have doubtfully been placed in Janiralata because they seem to 

 fit the diagnosis of that genus better than that of any other genus 

 with which I am acquainted. 



A key to the species here assigned to Janiralata appears on pp. 

 137-138. 



JANIRALATA, new genus 



Genotype, — Janiralata davisi, new species. 



Generic diagnosis. — Janiridae in which the first, second, and third 

 segments of the maxilliped palp are as wide as the endognath. Max- 

 illiped with two or three coupling hooks. Dorsal surface of body 

 lacking lobes or spinelike lobes. Epimera ^ distinct on somites 2-7 

 and visible in dorsal view. Eyes present, dorsal but near lateral 

 margins. Second antenna with a conspicuous antennal scale. First 

 male pleopods with tips laterally expanded as in laniropsis, but 



1 See "Remarks Concerning Hansen's Concept of Janira Leach" on p. 138 of this paper. 

 - Those of first peraeon somite frequently indistinct. 



