28o Miscellanea. [Vol. I, 1907.] 



a species described from Thenus orientalis from shallow water on the 

 east coast of the Malay Peninsula {Proc. Zool. Soc, 1902, p. 373). 

 As my specimens are evidently immature, I am unable to decide 

 whether they are merely a variety of this species or specifi.cally 

 distinct. The points in which they differ from Lanchester's speci- 

 mens are the following : {a) the penis is extremely short ; (6) 

 the carina extends upwards a little further and is not so markedly 

 produced at its lower extremity ; (c) the tergum is larger, more 

 nearly transverse and not so deeply notched at the point where 

 the occludent segment of the scutum meets it ; (d) the capitulum 

 is more regular in outline and is not produced above the aperture 

 into a lobe ; (e) the valves are transparent and feebly calcified except 

 immediately round the umbones of the scuta and terga ; (/) no 

 chitinous points are visible on the peduncle even under a high 

 power of the microscope. Although these differences are numerous, 

 the majority may be due to extreme immaturity on the part of the 

 specimens from Bathynomus. The depth at which the latter was 

 taken, viz., between 225 and 594 fathoms, is, however, very differ- 

 ent from that at which Lanchester's examples were collected. 



N. Annandale. 



