41 G DR MURRAY ON THE DEEP AND SHALLOW-WATER MARINE FAUNA 



^Pteraster 1 affinis, Smith. 



„ rugatus, Sladen. 



* ,, semireticulatus, Sladen. 

 *Retaster peregrinator, Sladen. 

 *Solaster sitbarcuatus,' 2 Sladen. 



Ophiuroidea : 



*Amphiura angularis, Lyman. 



,, antarctica (Ljungman). 



,, studeri, Lyman. 



* „ tomentosa, Lyman. 

 Astrotoma agassizii, Lyman. 

 Gorgonocephalus pourtalesii, Lyman. 



*Ophiacantha imago, 3 Lyman. 



,, vivipara, Ljungman. 



*Ophiocoriis antarctica, Lyman. 

 Ophiocten amitinum, Lyman. 

 ,, sericeum, Ljungman. 



*Ophioglypha ambigua, Lyman. 



* 



5J 



brevispinuf Smith 



55 



deshayesi, Lyman. 



55 



hexactis, 5 Smith. 



5) 



intorta, Lyman. 



IINOIDEA : 





Echinus magellanicus, Phil. 



,, .oncirgaritaceus, Lamarck. 

 Goniocidaris canaliculata, Agassiz. 

 Hemiaster cavernosas (Phil.). 

 Schizaster moselcyi, Agassiz. 



1 With the exception oi' two Atlantic species, Pteraster caribbceus [from the West Indian area] and Pteraster sordidut 

 [from the " Talisman " or " Travailleur " dredgings], all the members of this genus are confined to the colder temperate 

 and frigid zones. Notwithstanding its wide range of distribution the genus appears to show only a comparatively small 

 amount of morphological plasticity. — (Sladen, Zool. Chall. Exp., part 51, p. 470.) 



2 Solaster subarcuatus is nearly allied to Solaster endeca [from the Arctic and North Atlantic], of which it is perhaps 

 the southern representative. — (Sladen, Zool. Chall. Exp., part 51, p. 457.) 



3 Ophiacantha mayo represents in the Antarctic zone the Arctic Ophiacantha anomala, from which it differs in 

 having a minute slender tentacle scale and only five arms.— (Lyman, Zool. Chall. Exp., part 14, p. 187.) 



4 Several species inhabiting the seas of the North bear a superficial resemblance to this form [Ophioglypha 

 brevispina] : — such are 0. albicla, Forbes, 0. robusta, Ayres, and 0. nodosa, Liitken. And besides these 0. Lymani, 

 Ljungman, from Patagonia, is very like it. — (E. A. Smith, Phil. Tram., vol. 168, p. 281.) 



5 In colour and general appearance it [Ophioglypha hexactis] approaches 0. sarsii, Liitken, of the Greenland coast, 

 which seems to be its nearest ally ; but these species are so different from one another in detail, that it is needless bo 

 specify their distinctions. — (E. A. Smith, Phil. Trans., vol. 168, p. 280.) 



The Challenger series [of Hemiaster cavenwsus] is so extensive, and shows such a range of variation both in form 

 and in the structure of the petals according to age" and sex, that I am quite convinced it is impossible to define the 



