430 Journal of the Asiatic Society of Bengal. [N.S., XTX, 1923.| 
Remarks.—These specimens are in substantial agreement 
with those described by me from Japan and the eastern part 
of China in the essential form and structure of the appendages 
and especially in having accessory vesicles on the branchial 
lamellae. They vary from the typical form in the spinulation 
of the segments of the pleon. There are no spinules on the first 
three somites, two spinules on the fourth, two on the fifth and, 
in the female specimen, one spinule on the sixth somite; in the 
other specimens this somite is without spinules. Thus these 
specimens have fewer spinules on the pleon than those from 
apan. The telson has a single spine at the apex of each lobe 
and one on each lateral margin. There are practically no setae 
or only a very few short ones on the third uropod. These small 
variations come well within the range of that known for other 
species of the genus. 
It isa matter of some interest to find this species at the 
other side of China from the localities at which it was first dis- 
covered. China has not been extensively explored and future 
work will probably show that this Gammarid is widely distri- 
buted in the rivers and streams of the Chinese Empire. 
Gammarus gregoryi, sp. nov. 
Head.—Shorter than the combined length of the first two 
free thoracic somites measured in the mid-dorsal line; lateral 
the length between these two points; no outer row of colour- 
less ommatidia. 
Side plates.—1-4, deeper than the corresponding somites : 
first three rhomboidal in shape with the lower (distal) angles 
rounded ; the first plate with two small notches for the articu- 
lation of minute spinules at each of the anterior and posterior 
angles, the second plate with one anterior and three posterior 
notch of the same kind ; fourth side plate as broad as deep, 
posterior expansion short with the hind margin straight and 
armg about six minute spinules in notches; two similar 
spinules are present on the lower anterior angle of the fourth 
side 
