OF THE KERGUELEN REGION OF THE GREAT SOUTHERN OCEAN. 40:5 



LIST III. 



' ]\Ietazoa procured by the Challenger in Intermedl-^te Depths between 1 50 

 AND 1000 Fathoms, in the Kerguelen Region. 



Returniug now to the region in the Southern Indian Ocean traversed by the 

 Challenger during the cruise from the Cape of Good Hope to Australia, which is the 

 special subject (jf this paper, we proceed to complete our review of the marine 

 fauna of this Kerguelen Region by giving a list of the s^aecies taken by the 

 Challenger in depths less than 1000 fathoms. We give in the first place a list 

 of the species taken in moderate depths (between 1000 and 150 fathoms), reserving 

 for a future list (List IV.) the essentially shallow- water species taken in depths less 

 than 150 fathoms in the same region. There were only three drcdgings taken in 

 intermediate depths between 150 and 1000 fathoms, viz., at Station 145a, near Marion 

 Island, in 310 fathoms, and at Stations 148 and 148a, near the Crozet Islands, in 

 210 and 550 fathoms; the trawl was not used at any of these Stations. The species 

 known only from these dredgings are indicated by an asterisk *. 



Monaxonida : 



Axinella evecta (Carter). 

 ^Esperiojjsis symmetrica,^ Ridley and Dendy. 



(idlms carduus,' Ridley and Dendy. 



fophon clielifer,'' Ridley and Dendy. 

 * ,, laminalis* Ridley and Dendy. 



1 Esperiopsis symmetrica is a very remarkable sponge, the most noticeable feature in whicli is the raJiately sym- 

 metrical arrangement of the skeleton. — (Ridley and Dendy, Zool. Chall. Exp., part 59, j). 78.) 



* Gdlius cardmis is readily distinguished by its very characteristic e.vternal form, the surface resembling that 

 of a large thistle-leaf, whence the specific name. The shape of the skeleton spicules is also very characteristic. . . . 

 The variety magellanica is a very interesting geographical variety from the Strait of Magellan. The main features in 

 which it differs from the type specimens concern the o.xeote spicules which, in the variety in cpiestion, are much more 

 l)ointed and a good deal shorter than in the type. — (Ridley and Dendy, Zool. Chall. E.cp., part 59, pp. 39, 40.) 



2 Three specimens of this interesting species \Iophon cliclifer] are present ; two are fairly large, but broken into 

 fragments, the other is small, and occurs encrusting a branched Polyzoon. The latter is in all probability a young 

 form, and differs in several minor respects from the larger specimens. . . . The species differs very decidedly from 

 all described forms in the large si;!e and also in the degree of elaboration of the bipocillate spicules. The othci- 

 spicules are also larger in almost every case than the corresponding forms in other sjiocies of lophon ; loplion (Ahhion) 

 piceim, Vosmaer, from Barents Sea, approaches it the most nearly in this respect.— (Ridley and Dendy, Zool. Chall. 

 Exp., part 59, pp. 119-120.) 



* Only one siiecimen, broken into fragments, of this interesting species [lophon laininalis] was obtained. In the 

 fine state of development of its bipocillate microsclera it approaches lophon chelifcr, a specimen of which was obtained 

 at the same Station ; while in e.xternal form it probably comes near lopihon picciim, Vosmaer, from Barents Sea. The 

 species to which it is perhaps most nearly related is, however, lophon cylindrii-uf: (from off Ca]ie Howe), wliich, like it, 

 has the stylote spicule smooth. — (Ridley and Dendy, Zool. Chall, Exp., part 59, p. 121.) 



