CRTISTACEA OF THE MEEGUI ARCHIPELAGO. 11 



antero-lateral spine, whicli in the typical specimen is the same 

 size as the third, and in which it is directed slightly forward and 

 upward. I, however, regard this small difference only as sexual, 

 local, or individual. 



As regards Doclea Jiyhridoida, Blkr., I suppose it to be a mere 

 variety of Doclea hylrida, characterized by the rudimentary state 

 of the tubercles o£ the branchial regions. 



Doclea Jiyhrida having been recorded also from the coast of 

 Coromandel, would appear to inhabit the north-eastern part of 

 the Indian Ocean. 



2. Doclea Andeesoni, n. sp. (PL I. figs. 1 &2.) 



A single adult specimen was collected at Sullivan Island, 

 together with the preceding species. 



This new species closely resembles the Doclea figured by Seba 

 (Thesaurus &c. t. iii. p. 41, tab. xvii, fig. 4), and I suppose it to 

 be the same. The specimen from Sullivan Island, however, 

 does not agree with Bleeker's description of Doclea Selan, Blkr., 

 a species founded upon the same figure, as its upper surface 

 is not armed with spines. Bleeker has pointed out that whereas 

 the specimens he referred to D. Sehce had spines, these structures 

 are not found in the figure given in the ' Thesaurus.' 



The cephalothorax is 29 millim. long (without the rostrum and 

 the posterior spine) and 30 millim. broad (without the lateral 

 spines). Presenting thus the same circular form as Doclea hylrida, 

 our species at first sight may be distinguished by its much lower, 

 less convex, more depressed cephalothrax. The cephalothorax, 

 which in D. liyhrida is semiglobular, in our new species is more 

 disk-shaped. The whole (upper and under) surface is densely 

 covered with a short woolly down. The rostrum has the same 

 form and size as that of D. liyhrida, extending as much forwards. 

 The antero-lateral margins are armed with four rather acute short 

 spines, which are arranged in the same manner as in the pre- 

 ceding species ; the three anterior ones are nearly equally long, 

 viz. 2-2| millim., but the posterior tooth is a little longer (3j 

 millim.) and directed slightly forward and upward. This latter 

 spine measures about half the breadth of the base of the rostrum 

 (the transverse line that unites the internal angles of the supra- 

 orbital fissures). The posterior margin of the carapace is armed 

 with a median acute spine, directed backward and slightly upwards, 

 which is nearly as long as the last antero-lateral spine. Though 



