CRUSTACEA OF THE MERGUI ARCHIPELAGO. 103 
with those of 7. Callianira, and the under margin of the lower 
finger is minutely granular near the tip. 
The ambulatory legs are unfortunately wanting, except the left 
leg of the last pair; this leg closely resembles the corresponding 
leg of T. Callianira, but the propodite is comparatively a little 
shorter and broader. The dactylopodite is flattened and not 
grooved or ridged. | 
Dimensions :— 
! millim 
iweneth of the cephalothorax ..........-+.:+.- 103 
Distance between the epibranchial teeth ...... 134 
Distance between the external orbital angles.... 113 
Length of the larger hand (fingers included).... 103 
Meiehtiotethe hand: 25. . de4is vee oles cee as 57 
beeadtneoiy te Trot . ../. 0% <..d0 sale t.s b/s ee saat 64 
Genus PinnotHERgEs, Latr. 
65. PinnorHeres Epwarpst,u.sp. (Pl. VI. figs. 6-9.) 
The collection contains one adult female specimen of a Pinno- 
theres, provided with eggs, which was found in an Ostrea at King 
Island Bay. 
I regard this species as new. So far as I know, eight species 
of the genus Pinnotheres, besides the European P. piswm (which, 
according to Heller, occurs also in New Zealand), have been 
described as inhabiting the shells of Mollusca in the Indian Ocean. 
Although the specimen before me agrees in many of its 
characters with the European P. piswm, it appears to be distin- 
guished from it by the shape of its external maxillipeds and by 
the short down with which the whole animal is nearly covered. 
It closely resembles P. piswm in the shape of its cephalothorax, 
but the front is a little more prominent and the carapace is 
somewhat more laterally dilated, the antero-lateral portion of the 
lateral margin making a blunt angle with the postero-lateral 
portion. The upper surface is a little convex, and the grooves 
or depressions by which the gastric, cardiac, and intestinal regions 
are separated from the lateral regions of the upper surface are 
rather deep, whereas in P. piswm these impressions are quite 
indistinct. 
The whole upper and under surfaces of the cephalothorax, the 
external maxillipeds and the abdomen included, appear to have 
