202 L. A. BORRADAILE. 
which recall 7. admeta, var. granosimana on the one hand, and 7’. sima on the other. From 
the latter species, however, as well as from 7. chaptali, T. poissoni is sharply distinguished, 
as yet, by the presence, on the hinder edge of the propodite of the last leg, of several 
spinules, of which there is no trace in Z. sima or YT. chaptali. From T. admeta it is 
sundered by its much smaller size. 
At present, therefore, it is necessary to keep separate the four forms of Thalamita 
known as 7. admeta, T. sima, T. poissoni and T. chaptali; but it is far from impossible that 
they may eventually prove to be all varieties of one species, perhaps in process of separation 
as independent species. 
Dredged in Suvadiva, South Nilandu, Mulaku, Addu, Haddumati, Miladumadulu, Fadifolu, 
Kolumadulu, and Minikoi, on all kinds of bottoms, in from 7—43 fathoms. Elsewhere has 
generally been taken on the shore, but the same remarks apply here as in the case of 
T. sima. 
9. Thalamita admeta (Hbst.), 1803. 
T. admeta and T. quadrilobata, Alcock, Iv. pp. 82—85. 
Among the numerous specimens of this very variable species collected by the Expedition, 
were examples of two varieties hitherto unrecorded. One of these has characters in common 
with both 7. quadrilobata Miers and the type of 7. admeta, having the front of the latter 
but resembling the former in all other respects. I propose the name of intermedia for this 
form, and have also taken the step contemplated by Alcock, of including quadrilobata with 
admeta. The other variety, which I propose to call granosimana, resembles var. savignyi, 
but has the under side of the cheliped granular as in 7. sima, which it also resembles in 
a rather less flattened body and more arched front than those of 7. admeta. 
The following key includes all the varieties of this species at present recorded: 
I. Crest on the basal joint of the second antenna toothed or granular, not spinose, 
1. Space between the two lower ridges of the hand (propodite of cheliped) smooth or 
only very sparsely granular. Fingers shorter than the palm, dactylopodite hooked. At least 
the big chela of the male deep and full in shape. Median cleft of the front always deep. 
Fourth side-tooth of carapace usually quite vestigial. 
i. Outer surface of hand more or less granular; ridges strongly developed. 
Var. A, admeta (Herbst.), 1803. 
ii. Outer surface of hand smooth; ridges slight. 
Var. B, edwardsi Borradaile, 1900. 
2. Space between the two lower ridges on the hand strongly granular. Fingers as long 
as palm, straight. Chelae slender in shape. Median cleft of the front often shallow. Fourth 
side-tooth of carapace small, but not vestigial. 
i. Under side of hands smooth. 
Var. C, savignyi A. Milne-Edwards, 1861. 
u. Under side of hands granular, 
Var. D, granosimana n. 
