OK rilK KERGUKLEN KEOTON OF THE GKEAT SOUTHERN OCEAN. o.");'. 



LIST I. 



.Mktazoa rKoia'KKi) i;v xiiK Chai.lkngi-u; ix the Deep-watkr Akka of the 

 Keiuuelkn Reuiox, in hki'ths exceeding 1200 Fat>ioms. 



Tliis list contains all the species and varieties of marine Metazoa described and 

 recorded in the Challenger Report irom eight deep-water Stations in the Great Southern 

 Ocean, south of the Indian Ocean, traversed by the Cluillenger during tlie cruise from 

 the Cflpe of Good IIoi>e to the Antarctic Circle and Australia, viz.. Stations Nos. 14G, 

 147, 152, 153, 156, 157, 158, and KiO, lying between latitu.le 42' 42' to 65' 42' S. and 

 longitude 45° 31' to l;M 10' Iv, the depths varying from 1260 fathoms at Station 152 to 

 2600 fathoms at Station 160. Vov the sake of brevity this region has been called the 

 deep-water area of the Kergueleu liegion. At the most southerly Station (No. 153) the 

 dredge was used, the trawl being sent down at the other seven Stations. The species 

 not known to occur outside the region represented by these eight Stations, nor therefore 

 in depths less than 1000 fathoms, are indicated in this list by an asterisk *. 



^loX.WONlDA : 



Axinella erecta ^ (Carter). 

 *Cla(Iorkiza^ moruli/o)-inis;' Ridley and Dendy. 

 * „ (?) triilentata,^ Ridley and Dcudy. 



*EspereUa mammi/orinis,^ Ridley and Dendy. 

 ^Espenopsis'^ profunda,^ Ridley and Dendy. 



' A.tinella (ivctu is a very variable specits. — (IJim.KV aiul 1)kni>v, /ool. Chull. Key., put 5i», \\. \S2.) 



^ Although the ilitTereut sjiocies of Cliidovhi.-.a vary very much in external form, yet tho diU'erent modilicatious of 

 the nmiu skeleton, upon which the external form of the sponge depends, are easily derivable from one common primary 

 type, and atfonl interesting instances of adaptation, — (Rhilky and Dendy, Zool. Vhall. Exp., part 59, p. 8ti.) 



' ChuhxhiM moruliformiii is a iotm of the very greatest interest, and alfoixls a good example of radial symmetry in 

 a Monaxonid Sponge. It was a ipiestiou with ns whether or not this species should foim the type of a new genus, but 

 we tinally decided not, as no essential cliaiiges are necessary to derive it from the more typical species. ... It is, 

 of course, by no means impossible that perfect specimens of Ctadorhixa morutiformin may have a branching stem with 

 a head at tho end of each branch.--(RiDLBY and Dkndy, Zool. ChaU. Krp., pirt 59, pp. 91, 92.) 



* In the arrangement of its skeleton Claitorhhtt tridmtata stands (pute alone in the genus, and as this is generally 

 such a good guide, it seems very doubtful whether it ought to be admitted as a Cludorhixti, but for the sake of con- 

 venience we shall retain it here for the present, placing it at the end as a doubtful species. — (Ridley and Dendy, Zool. 

 ChaU. A'.iy., part 59, p. 9(!.) 



^ Kapei'ella mammifonnis is a very beautiful little s]iecies, and all'onls another good example ol a deep-sea spoiige 

 with a detinite external form. — (Hidlky and Dendy, Zool. CImII. Kip., part 59, p. 03.) 



" Several of the species of the genus EsperiopsU are remarkable for their well-detined external forms, which serve 

 as excellent guides by which to separate them from one another and from others of the genus. , . . The distribution 

 of the genus J'^qhiiopnU is very wide, both vertically and horizontally, but it appears to prefer deep water in temperate 

 or boreal seas.— (Ridley and Dendy, Zool. Clittlt. E.ip., part 59, p. 77.) 



' Kspiriopsis profandu is interesting on account of the great depth (KiOO I'alluMus) lioni which it was obtained, and 

 with this must again be associated the presence of a definite external I'orui.— (Uuu.ey and De.ndv, Zool. Chall E.cp., 

 part 59, p. 81.) 



