ECHINODERMA. 3 



very considerable difference in size. As there is but a single specimen, I thought 

 the question whether or no it is hermaphrodite might be left over for the present. 



The only suggestion that I have to make is that Prof. Ludwig's definition of the 

 genus {up. cit., p. 50) should be altered l)y the omission of tlie words " Sehr wenigen," 

 as applied to the dorsal " Fiisschen." 



As the type of the genus came from Macquarie Island, the two are not widely 

 separated ; no information is given as to the depth of the more northern species ; the 

 Antarctic form was taken at 20 fms., while at Winter Quarters. 



Thyone sp. 

 A young specimen was taken off Cape Adare. 



MeSOTHURIA MAGELLAN!. 



lloluthuria maycllani, Ludwig, Ber. Oberbess. Ties. xsii. (1883), p. 175. 



Mesothuria wagellani, Oestergren, Festskrift fiir Lilljeborg (189f;j, p. 3.50 ; LuJwig, Ergebii. Hamburg. 

 Sammelreise Holotbur. (18',)8), p. 8. 



Two much-injured specimens are assigned to this species ; I was unable to find 

 spicules, but I do not always expect to find specimens taken out of ice-cold water and 

 from 100 fms. equal to the liest products of the laboratories of Naples or Plymouth. 



Coulman Island, 100 fms. 



B -ACTINOGONIDIATA . 



II. CRINOIDEA. 



COMATDLIDAE. 

 Promachocrinus KERGUELENENSIS. 

 (Plate I.) 

 Promachocrinus kerguelensis, P. H. Carpenter, Proc. Roy. Soc. xxviii. (1879), p. 385. 



This is certainly one of the most interesting finds of the ' Discovery,' for the genus 

 was, till the German South Polar Expedition brought l)ack specimens, only known from 

 the collections of the ' Challenger,' which found two species in the Southern Seas, and 

 one a few degrees north of the Equator. The only addition to our knowledge since 

 Dr. Carpenter's report has been the note by Dr. Minckert of Greifswald,* while Dr. 

 Bather has suggested that it may be a " permanent meristic variation."! I give a figure 



* Zool. Anzeig. xxviii. (1905), p. 490. 

 t Treatise on Zoology iii. (1900), p. 195. 



