58 PTEROPODA. [Thecosomata. 



Animal with a small lobe on the dorsal margin of each fin. 



Type (?). 



Rob. Lyall Bay, in shell-sand (Miss Mestayer). 



Remarks. The type is from Cape Horn (Souleyet). The species 

 has a wide distribution round the South Pole. Living specimens were 

 obtained by the " Challenger " from Marion Island to Crozets, at 

 Kerguelen Island, Heard Island, and in the vicinity of antarctic ice, 

 in latitude 63 30' S. 



The specimen from Lyall Bay was identified by Mr. C. Hedley, 

 of Sydney ; I have not seen it. 



LITERATURE. 



Boas, D>. J. E. V. " Spolia atlantica." 1886. 



Eydoux et Souleyet. Descr. sommaire de plus. Pteropodes nouv., 



destines a etre publies dans le Voyage de la " Bonite." Rev. 



Zool. 1840. pp. 235-39. 



Forbes and Hartley. Hist, of Brit, Moll., ii, 1853, pp. 377-86. 

 Gegenbaur, C. ' Untersuch. iiber Pteropoden und Heteropoden." 



' 1855. 

 Huxley, Th. H. " Anatomy of certain Heteropoda and Pteropoda 



collected during the Voyage of the ' Rattlesnake.' ' Philos. Trans., 



cxliii, 1853, pp. 39-44. 

 Lesueur. Mem. s. quelques nouv. esp. d'auim. mollusques, &c, 



Nouv. Bull. Soc. Philom. Paris, iii. pp. 281-85. 

 Miiller, Joh. Bemerk. aus d. Entwicklungsgesch. d. Pteropoden. 



Monatsber. Berlin. Akad., 1857 (1858), pp. 180-204. 

 Pelseneer, P. ' Challenger ' Reports," Zool., vols. xix, xxiii. 

 Peron et Lesueur. Hist, de la fam. des Moll, pteropodes. Ann. Mus. 



Hist. Nat, Paris, xv, 1810, pp. 57-69. 

 Pfeffer, G. ' Die Pteropoden des Hamburger Museums." Naturwiss. 



Verh. Hamburg, vii, 1880, pp. 67-99. 

 Rang. Descr. de deux genres nouv. Pteropodes. Ann. Sci. Nat. (1), 



xii. 1827, pp. 320-329. 

 Rang and Souleyet. Hist, Nat, d. Moll. Pteropodes. Monographic. 



Paris, 1852. 

 Troschcl. Beitrage zur Kenntniss d. Pteropoden. Archiv f. Natur- 



gesch., 20 Jahrgang, 1854, pp. 196-241. 



