206 L. A. BORRADAILE, 
(v) The chelipeds of the adult male are almost absolutely equal. Transverse squamiform 
markings are almost wanting. The upper side of the hand is covered with rounded granules, 
but on the inside squamiform markings remain. 
(vi) There are about 10 spines on the hinder edge of the last propodite. 
Length of longest specimen (¢’), 13 mm. Breadth of same specimen, 17 mm. 
Colour in spirit, sandy mottled with reddish. 
Taken in Minikoi, sheltering under stones on the reef. This species is transitional to 
Charybdis (Goniosoma), but is separated from that genus by having only five side-teeth. 
The outward trend of the antero-lateral edge is a character which makes its position in 
the genus Thalamita somewhat doubtful. 

Fic. 37. Thalamita cooperi; a. outside of chela. 
13. Thalamita cooperi n. sp. 
Closely allied to J. invicta Thallw. 18901, of which it is possibly only a variety. It 
differs from Thallwitz’ species however in the following points: 
(i) The fourth side-tooth is wanting, and not merely vestigial as in invicta. 
(ii) The outer side of the hand bears the usual five spines, instead of only three. 
The front is lobed (excluding the orbital lobes), the middle lobes being the widest and 
somewhat recalling the frontal lobes of 7. admeta. There are four side spines including the 
orbital angle, the fourth of those usually present being lost. The antennal ridge is granular. 
On the outside of the hand are the usual five spines and three granulated ridges. The 
fingers are shorter than the hand. The last propodite bears about half-a-dozen spinules. 
1 Thallwitz, Abh. Zool. Mus. Dresden, 1890—1891, No. 3, p. 46. 
