310 MR. BELL, HOILE CARCINOLOGICLE ; 



A close examination of the specimen in the British Museum, described by Messrs. 

 Adams and White as " Iphis," has fully confirmed the impression I had received from 

 their figure that this is a true Arcania. Its general form is that of this genus, differing 

 greatly from that of Iphis ; and its resemblance to A. undetim-spinosa of De Haan is very 

 close. In fact it scarcely differs excepting in the number of spines. 



Arcania septem-spinosa, mihi (Tab. XXXIV. fig. 7). Testa globulosa, paulb latiore 

 quam longiore, tuberculata, spinis septem tuberculatis armata, laterali utrinque reli- 

 quis longiore. 



Hab. ? Mus. Brit. 



Approaching Iphis in form, particularly in the transverse diameter of the carapace a 

 little exceeding the longitudinal, and being furnished with two lateral spines longer than 

 the others. The spines in this species, as in Arc. tuberculata and Brmaceus, are them- 

 selves tuberculated. The posterior pair of marginal spines, which are flattened, show this 

 character in a very beautiful manner, as is seen in the figure (d). The anterior legs are 

 slender, the arm slightly curved, covered with tubercles ; the hand smooth, swollen at the 

 proximal portion ; the fingers very thin, curved, nearly as long as the hand, toothed, and 

 meeting only at the points. The remaining feet are wanting in the specimen, excepting 

 one, and the rest have been added in outline in the figure, from the nearly allied species. 



Length of carapace 0*4 in. 



Arcania tuberculata, mihi (Tab. XXXIV. fig. 8). Testa paulo longiore quam latiore, 

 omninb tuberculata, margine spinis novem tuberculatis instructo ; brachiis granu- 

 latis, manibus lsevibus. 

 Hab. ad ins. Borneo. Mus. Brit. 



Carapace subglobose, covered with various-sized tubercles ; at the lateral and posterior 

 margin there are nine spines occupying the same situations as those in the larger species, 

 and obviously replacing them ; these spines are themselves tuberculated. The whole of 

 the under surface is granulated, as is the arm ; the hand quite smooth. 

 Length of carapace 04 in. 



Arcania gracilipes, mihi (Tab. XXXIV. fig. 9). Testa granulosa, tuberculis quindecim 



supra, et tribus ad marginem posteriorem instructs ; pedibus anticis tenuissimis. 

 Hab. ad ins. Borneo. Mus. Brit. 



The whole carapace is granulated ; there are fifteen distinct tubercles on the upper part 

 and sides, and three on the posterior margin. The anterior feet are extremely slender, 

 the fingers as long as the hand, and meeting only at the points. 



Length of the carapace 0*3 in. 



Arcania l^vimana, mihi (Tab. XXXIV. fig. 10). Testa granulata, tuberculis nume- 



rosis distinctis, ad marginem spinis novem simplicibus armata ; manibus glabris. 

 Hab. ad insulas Philippinas. Mus. Brit. 



