CETTSTACEA. 265 



the- daotiyli well developed and impinging against the produced 

 scabrous infero-distal lobe of the preceding joint. The postabdomen 

 (in the female) has on its left side three appendages, articulated 

 with as many membranaceous dorsal plates, and each terminating 

 in four filaments or flagella, which are clothed with long hairs. The 

 uropods on one side are imperfect, their rami are margined with 

 rather long hairs ; the segment with which they are articulated has 

 a longitudinal groove on its dorsal surface. The coloration (which 

 is probably faded in both the specimens examined) is yellowish or 

 whitish, with very faint pink reticulations in the larger specimen ; 

 the chelse are pink, the eye-peduncles bordered on the sides with 

 broad longitudinal bands of brownish pink; the under and inner 

 surfaces of the last two joints of the second and third legs are of 

 the same colour. The length of the carapace (in the larger speci- 

 men) is about 1 inch 5 lines (37 miUim.), the length of the third 

 (right) leg exceeds 3| inches (90 millim.) ; but the specimen being 

 dried, its exact dimensions cannot be given. 



Of this species a rather small adult female was taken in the 

 Arafura Sea, 32-36 fms. (No. 160). A much larger female, in mu- 

 tilated condition, wanting the postabdomen, is among the Banksian 

 specimens in. the British-Museum collection, from which the descrip- 

 tion is mainly taken. 



This species resembles Glihanarius, and differs from most species 

 of Pagurus in the subpqual spinulose chelipedes ; in the structure 

 of the ophthalmic segment of the eyes, the absence of a rostrum, 

 and in other points it is a true Pagurus. In P. ]platyihorax, Stm., a 

 species with equal chelipedes, the chelae and legs are not spinulose. 



The Pagurus minutus, Hess {vide HasweU, Cat. p. 156), from 

 Sydney, is too briefly described for certain identification, but seems 

 to be distinguished from P. rubrovittatus by the shorter antennal 

 appendages and tuberculated non-spinuliferous chelipedes. 



8. Clibanarius tseuiatns. 



Pagurus clibanarius, Qmy Sf Oaimard in Voy. de V Uranie, Zoologie, 



Crust, p. 529, pi. Ixxviu. fig. 1 (1824). 

 Pagurus tssniatus, M.-Edwards, Ann. Sd. Nat. s6r. -3, Zool. x. p. 62 



(1848). 

 Clibanarius tseniatus, Stimpsoh, Proc. Acad. Nat. Sd. Philad. p. 235 



(1858). 



A single male was obtained at Port MoUe, inhabiting a shell of a 

 species of Purpura. Another specimen, presenting a precisely 

 similar system of coloration, is in the British-Museum collection 

 from Shark Bay (F. M. Rayner, H.M.S. ' Herald '). 



These specimens agree with the figure of Quoy and Gaimard, and 

 differ from 'the specimens referred to C. vulgaris in the collection of 

 the British Museum, in having the carapace (as well as the ambu- 

 latory legs) marked with longitudinal pale lines bordered with red : 

 in the specimens referred to P. vulgaris this coloration does not exist 

 upon the carapace; the eye-peduncles are somewhat longer and 



