OF THE KERGUELEN REGION OF THE GREAT SOUTHERN OCEAN. 413 



Gellius glacialis, var. nivea, Ridley and Dendy. 

 Haliclwndria panicea, Johnston. 



sp.(?). 



*Iophon abnormalis, Ridley and Dendy. 

 Latrunculia apicalis? Ridley and Dendy. 



* ,, bocagei, 1 Ridley and Dendy. 

 *Myxillafusca, Ridley and Dendy. 



,, mariana, Ridley and Dendy. 

 * Pacliychalina (?) pedunculata, 2 Ridley and Dendy. 



* Petrosia hispida, Ridley and Dendy. 



,, similis, 3 Ridley and Dendy. 

 Stylocordyla stipitata (Carter), var. globosa, Ridley and Dendy. 

 Suberites antarcticus, Carter. 



,, caminatus* Ridley and Dendy. 



* ,, microstomas, Ridley and Dendy. 



Tetractinellida : 



^Cinachyra barbata," Sollas. 



the Arctic Sea, though the exact locality is unknown. Having regard to the want of definite characters in this species 

 other than the form of the sigmata, we cannot further insist on the strong resemblance which this form bears to our 

 species, as its locality is so far removed from that of Gellius flagellifer. — (Ridley and Dendy, Zool. Chall. Exp., part 59, 

 p. 43.) 



1 As regards external form it will be seen that Latrunculia bocagei is almost indistinguishable from the Kerguelen 

 specimen of Latrunculia apicalis, and correspondingly different from Latrunculia brevis [Station 320, off the Rio de la 

 Plata, 600 fathoms] ; but in this case we are not inclined to set much value on external form as a specific character, 

 for we have already seen that the specimens of Latrunculia apicalis from Kerguelen and from Station 320 respectively, 

 differ in external appearance ; indeed, to judge from the Challenger series of specimens of the genus, it would seem 

 that external appearance depends on the locality, and that all the species from the same locality tend to have a similar 

 external form. — (Ridley and Dendy, Zool. Chall. Exp., part 59, p. 239.) 



2 Pacliychalina (?) pedunculata resembles in several respects Vosmaer's Pacliychalina caulifera (from the Arctic Sea), 

 but it is cylindrical instead of flattened, and the shape of the spicules is different, being slender instead of broadly 

 fusiform. The fibres in Pacliychalina caulifera appear to contain a good deal more spongin than in the present species ; 

 indeed, it is only doubtfully that we include the latter in the genus at all ; it forms another connecting link between 

 the Renierinae and Chalininre, and shows how little value can be placed upon the amount of spongin present for 

 purposes of classification. — (Ridley and Dendy, Zool. Chall. Exp., part 59, p. 25.) 



3 No doubt the Kerguelen specimen [of Petrosia, similis] forms a connecting link, but we think it advisable to 

 distinguish between two closely allied species, Petrosia subtriangularis and Petrosia similis, the former characteristic of 

 West Indian seas, and the latter of the seas south of the Cape. Two well-marked varieties of the latter are described 

 below [one from near the Falklands, the other from the Philippines]. — (Ridley and Dendy, Zool. Chall. Exp., part 59, 

 p. 11.) 



4 The single specimen [of Suberites caminatus] in the collection is attached by a broad base to an empty Brachio- 

 pod shell, and terminates in a singular oscular projection at the apex. . . . This is a very pretty and interesting little 

 sponge ; it may be recognised by its external form, and more especially by the projecting, well-marked osculum. . . . 

 We have from Station 320 an interesting series of specimens which should perhaps be considered as belonging to a slight 

 variety of the above species ; they do not, however, appear to be distinct enough from the type to justify us in giving a 

 varietal name. They occur, for the most part, encrusting dead branches of a Sporadopora, on which they form colonies, 

 the different cushion-like individuals being united together by their bases. . . . The sponge is further remarkable 

 as forming colonies by continuous gemmation, in a manner very rare in silicious sponges. — (Ridley and Dendy, Zool. 

 Chall. Exp., part 59, pp. 198-9.) 



5 Over sixty specimens of this remarkable sponge [Cinachyra barbata] were dredged off the shores of Kerguelen. 

 They vary considerably in shape ; the smallest is a prolate ellipsoid, the next a little larger is egg-shaped, both are 



