192 REV. T. K. E. STEBBING ON TWO 



Inner plate o£ first maxillse small, with only two apical setse. Inner plate o£ 

 second maxillae shorter and narrower than the outer, not setose along the 

 inner margin. First and second gnathopods with fifth joint longer than 

 sixth. Perseopods 1-5 long and slender, with second joint narrow. Third 

 uropods with short peduncle and long rami. Tel son deeply emarginate. 



The name is derived from that of the Eussian author Lepechin, who in 

 1780 described and figured Oniscus cuspidatus, from the White Sea. Though 

 that species is involved in some obscurity, it no doubt belongs to the genus 

 FarampJiithoe, and is in point of time the earliest member of the present 

 family. 



Lepechinella chrysotheras, sp. n. (Plate 27.) 



The head has an acute horizontal rostrum, reaching about halfway along 

 the first joint of the first antennee. The first perseon segment is furnished 

 with two upstanding dorsal processes, each succeeding segment with one such 

 process, an additional little process preceding the principal one on the sixth 

 and seventh segments. On each of the first three pleon segments two small 

 processes precede the principal process, which points backward on the second 

 and downward on the third segment. The fourth segment has a large single 

 process and the fifth a minute one. All these processes are attended by 

 several pliant setse, a sort of streamers, perhaps designed to attract, and at 

 any rate in the dead specimen successfully retaining^ much disguising refuse. 

 The side-plates of the perseon present considerable variation in shape, that of 

 the first segment forming two subacute lobes directed much forward, that of 

 the second having a single lobe prolonged sharply downward. The three 

 following pairs are bilobed, with the front lobe the longer and somewhat 

 acute. The side-plates of the seventh segment have a little tooth directed 

 backward. The first three pleon segments have the postero-lateral angles 

 acute, those of the second and third segments being upturned. 



No eyes could be perceived. The first antennre have the first joint 

 moderately long and stout, the second longer and much more slender, the 

 third less than half as long as the first; the flagellum a little longer than the 

 peduncle, eigh teen-jointed. The secondary flagellum is very small, one- 

 jointed, half as long as the first joint of the principal. The second antennae 

 are a little longer than the first, the gland-cone small, the fourth joint equal 

 to the second joint of the first antennae, the fifth considerably longer, 

 somewhat longer than the ten-jointed flagellum. 



The lips were not successfully dissected, so that it is uncertain whether 

 the median part of the lower lip was bilobed, or only one-lobed as given in 

 the figure. 



The mandibles are normal, the cutting-edge dentate, the accessory plate, as 

 usual, more strongly dentate in one member of the pair than in the other ; 



