378 A HISTOEY OF RECENT CEUSTACEA 



the second pleopods. la-nthe specwsa, Bovallins, is by" 

 Hausen identified both generically and specifically with 

 the earlier Janira spinosa, Harger. Janira abyssicola,. 

 Beddard, was obtained among the Fiji Islands, from a 

 depth of 1,350 fathoms ; Janira laciniata, Sars, from 

 400 fathoms on the west coast of Norway. Janira tricornis 

 (Kroyer) comes from Greenland. 



Trichopleon, Beddard, 1886, has a rudimentary exopod 

 on the second antennae, the limbs of the perason with the 

 seventh joint simple, the uropods with the outer branch 

 one-jointed, the inner two-jointed. The type is Trichopleon 

 ramosum from the Philippines. 



lathrippa, Bovallius, 1886, was instituted to receive the 

 New Zealand species, Janira lonc/icauda,Ghi\ton, the genus 

 being distinguished from Janira chiefly by the two 

 branches of the uropods being long, laminar, and lanceo- 

 late, instead of narrow and stiliform. 



lais, Bovallius, 1886, is distinguished by having the 

 terminal joint of the limbs ' tritmguiculate.' It has two 

 elongate laminar branches to the uropods. The type is 

 lais Hargeri from the Strait of Magellan. 



[Acanthoniscus], Sars, 1879. differs from Janira in 

 having ' the first legs not subchelate, the rest with the 

 seventh joint simple, and the uropods stiliform with very 

 short branches.' The type species, Acanthoniscus typhlops, 

 is blind. Dr. Bovallius having pointed out that the name 

 Acanthoniscus is preoccupied, it may be changed to Acan- 

 thaspidia. 



lanthopsis, Beddard, 1886, was instituted to receive 

 lanthe Bovallii, Studer, from Kerguelen. It is allied to 

 the preceding genus, but distinguished from it by having 

 eyes, a rudimentary flagellum to the first antennas, and 

 bifid fingers on the limbs of the person. All the limbs 

 are similar to each other in both sexes. The uropods have 

 a long peduncle and two branches, of which the inner is 

 the larger. 



lolanthe, Beddard, 1886, is described as most nearly 

 allied to the two preceding genera. It has no eyes, and 

 the lateral margins of the head and the segments of the 



