I. '08. 



116 



of the merus, while the carpus and propodus are about equal. 

 The dactykis is short and claw-like and less than one-fifth the 

 length of the propodus. 



The branchial formula appears to differ from that of L. 

 Paulsoni in the occurrence of an epipod on the second maxilli- 

 pedes. 



■ 



VU. 



VIII. 



IX. 



X. 



XI. 



XII. 



XIII. 



XIV. 



Podobrauchiae, 



ep. 



ep. 





... 



i 







... 



Arthrobranchiae, 



... 





1 







... 







Pleurobranchiae, 





... 





1 



1 



1 



1 



1 



In the female the endopod of the first pair of pleopods (fig. 

 15) is narrow ; it is less than one-third the length of the exo- 

 pod and bears no setae on its margins. In the male (fig. 14) 

 the endopod is longer and w'ider, internally concave and 

 beset wdth setae on its posterior margin ; on the rounded 

 proximal portion of its anterior edge it bears a few short but 

 stout spines, while nearer the apex is a papilla furnished with 

 minute hooks. In the remaining pairs of pleopods the endo- 

 pod is only slightly shorter than the exopod and bears the 

 usual appendix interna at its base. 



Both uropods extend a trifle beyond the apex of the telson. 

 The outer (fig. 16) is slightly longer than the inner and is 

 about three and a half times as long as wide. It bears a 

 series of spines (seventeen in the type specimen) on the distal 

 two-thirds of its margin and thus bears in almost every 

 feature an exceedingly close resemblance to the antennal 

 scale. 



Size. — Tiie three specimens examined all measure about 

 21 mm. in length ; Stebbing mentions a specimen of L. Paul- 

 soni 46 mm. long. 



Colour hi life. — No notes w^ere taken at the time the speci- 

 mens were caught, but as far as recollection goes, they were 

 ivory white ^ith jet black eyes. 



Only two species of this highly specialized genus are known. 

 They may be readily distinguished thus : — 



L. Paulsoni. 



2 



Rostrum with e + g teeth. 



Third abdominal somite 

 produced posteriorly as a 

 dorsal spine. 



Eyes smaller. 



Terminal spine of outer 

 margin of antennal scale 

 reaching as far forward as- 

 lamellar portion. 



L. lar. 



Rostrum with 



9 to 10+3 to 4 



teeth. 



9-13 



Third abdominal somite 

 not produced posteriorly. 



Eyes larger. 



Terminal spine of outer 

 margin of antennal scale not 

 reaching as far forward as 

 lamellar portion. 



