THE MARINE FAUNA OF THE FALKLAND ISLANDS. 79 



V. Lagisca magellanica M'Intosh, Challenger, Vol. XII., p. 82. 



Habitat; Strait of Magellan, 175 fath. Kerguelen, 127 



fath. 



The genus appears to belong to the southern hemisphere, being 



widely distributed in that region, and in the tropics. It occurs also in 



the northern hemisphere, but is rare. 



There were also present in the collection some fragmentary specimens 

 belonging to the genera Terebella and Cirratulus, but they were too 

 badly preserved for identification. 



Gephyrea. 



Phascolosoma capsiforme Baird, Proe. Zool. Soc., 1868, p. 83 ; 

 Selenka's Sipunculiden, p. 27, 

 Numerous specimens of this species were found on roots of basket 

 kelp after storms. 



This species is peculiar to the Falkland Islands. The genus is cos- 

 mopolitan in shallow to very deep water. 



Mollusca. 



Out of 45 species of Mollusca from Lively Island, Falklands, which 

 Mr. Standen 1 has identified, 4 occur in the tropics as well as in the 

 southern hemisphere ; one ranges through the southern hemisphere, 

 the tropics and the northern hemisphere, Crepklula dilatata, which 

 extends all along the west coast of America from Patagonia to Alaska, 

 and also occurs in Kamtschatka ; 40 are found only in the southern 

 hemisphere, 29 of which occur only in South America and the Strait of 

 Magellan, whilst 5 are peculiar to the Falklands. 



Echinoidea. 



Goniocidaris canaliculata Agassiz, Revision of Echini, p. 395. A 

 single, young, somewhat damaged specimen. 

 This species has an extensive distribution. Southern oceans. 1,600- 

 1,975 fath. Sandwich and Navigator Islands. Natal. Falklands, 5-12 

 fath. 



It ranges along the southern extremities of all the southern con- 

 tinents and extends north of the equator to Japan. 



1 Melvill, J. C , and Standen, R., " Notes on a Collection of Marine Shells 

 from Lively Island, Falklands" (Journ. Conchol,, IX., 4). 



