280 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Family Asellid^e. 

 Genus Janira, Leach, 1814. 

 Janira occidentalism n sp. PI. XV., figs. 7 — 10. 



Four specimens. Length of female with ova 6'5 mm. 



Head rather larger than the first segment, front 3-lobed, 

 the centre lobe sub-acute, rather longer than the others. 



Side plates produced into lobes on each side projecting 

 as far as the central lobe and edged with short spines. 



First segment with two lateral lobes,* the anterior 

 acute and curved forward. 



Second and third segments 4-lobed.* 



Fourth segment 3-lobed.* 



Fifth and sixth segments 2-lobed,* the anterior much 

 the wider. 



Seventh segment with the marginal lobe acute and 

 directed backwards. 



Telson wider than long, ovate, the lateral margins 

 simple and produced into an acute posterior tooth ; the 

 posterior margin wider than the length of each lateral 

 margin, and having an obtuse central lobe. 



The lateral margins of all the segments are sparsely 

 fringed with rather short setae. 



Inner antennce (antennules) with the first joint large ; 

 flagellum reaching a little beyond the middle of the 

 penultimate joint of the peduncle of the outer antennae. 



Outer antennce as long as the entire animal; a well- 

 developed scale on the 3rd joint ; a group of 3 spines on 

 the middle of the inner margin of the penultimate joint, 

 which is about as long as the last peduncular joint. 



First pair of legs ; propodos rather shorter and much 

 narrower than the carpus ; its hind margin finely serrate 



* It is difficult to distinguish between the lobes of the actual segment 

 and those of the epimeral plates ; I have therefore taken them together. 



