128 DISCOVERY REPORTS 



St. 55. Entrance to Port Stanley, East Falkland Island, 10-16 m., i specimen. 



St. WS 85. Falkland Islands, 52'" 09' S, 58° 14' W, 79 m., sand and shell, i forma falklandica, 

 I forma hahni. 



St. WS92. Between Falkland Islands and Strait of Magellan, 51° 58' 30" S, 65°oi'W, 145- 

 143 m., I specimen, intermediate between iornva falklandica and forma hahni. 



St. WS 776. South-east of Cape Tres Puntas, Argentina, 47° 49' 37" S, 63°42|' W, 106-113 m., 

 I specimen. 



St. WS 798. Off Cape Tres Puntas, Argentina, 47° 32' S, 65° 02' W, 49-66 m., i specimen. 



St. WS 807. East of Porto Santa Cruz, Argentina, 49° 50^' S, 65° 03' W, 125-126 m., i specimen. 



St. WS 847 A. East of Porto Santa Cruz, Argentina, 50° 15!' S, 67° 57' W, 51-56 m., 3 specimens. 



St. WS 847B. East of Porto Santa Cruz, Argentina, 50° i8|' S, 67° 44' W, 56-84 m., 3 specimens. 



St. WS 849. Falkland Plateau, 50° 56I' S, 60° 58' W, 137 m., i specimen. 



Ganeria robusta Perrier is apparently typical G. falklandica, while G. papulosa, 

 founded on a single specimen, may well represent an individual variant of forma 

 falklandica. G. hahni is distinguished particularly by its slender rays, rather than by 

 peculiarities in number and disposition of spines, since the latter characters are repeated 

 in certain broad rayed specimens referable to iorma falklandica. The type of G. hahni is 

 probably sui ge?ieris rather than the representative of a natural forma, although I have 

 used the name in the record of specimens. 



G. falklandica is decidedly variable but the amplitude seems to be less than in 

 Cycethra verrucosa. Among the specimens of the latter from St. 55 is a curious variant 

 discussed in connection with examples believed to represent Perrier 's Lebrunaster. This 

 specimen has the proportions of forma hahni, the rays being narrow. The actinal surface 

 is clearly that of Ganeria. The marginal plates are small ; the tabula are well spaced one 

 from another, and carry 7 or 8 spines in the equivalent of 2 series after the manner of 

 some variants of Ganeria. Some of the proximal marginals are more paxilliform and not 

 very different from those of Cycethra, having very small marginals. But the abactinal 

 skeleton is more like that of Cycethra than Ganeria. The surface is uniformly covered 

 with spaced, small, fasciculate groups consisting of 3 or 4 cylindrical, blunt, upright 

 spinelets. One may safely say the animal is rather more than half Ganeria. 



Type locality. Falkland Islands. 



Distribution. Falkland Plateau and the region of the Strait of Magellan ; shallow 

 water to 137 m. 



Genus Cycethra Bell 



Cycethra Bell, Proc. Zool. Soc. Loud., 1881, p. 96. Type C. simplex Bell. 

 Lebrunaster Ferrier, 1891, p. 116. Type L. paxillosus Peiner. 



Under Cycethra verrucosa will be found notes on several aberrant specimens from 

 Sts. 55 and WS 85 which are considered to represent Perrier 's Lebrunaster, known only 

 by the type specimen. These specimens combine certain characters of both Cycethra and 

 Ganeria in such an unstable manner as to suggest that they may be hybrids. 



Antarctic specimens of Cycethra verrucosa are peculiar and probably constitute a 

 distinct race which shows close similarity to Perknaster densus as well as to typical 

 Perknaster, such as P. fuscus. 



