MELVILL AND STANDEN : MARINE SHELLS FROM LIVELY ISLAND. 99 



The genus Lachesis Risso, as restricted, now embraces about thir- 

 teen species, inclusive of a new species (Z. bicolor Melv.) from the 

 Arabian Sea. 1 They are mostly extra-tropical, indeed, the type Z. 

 minima Montagu is a well known inhabitant of our southern British 

 coasts. Besides this, three are Mediterranean, one Japanese, one 

 from the Island of St. Paul, one (Z. sulcata Hutton) from New Zea- 

 land, and another (Z. meridionalis E. Sm.) from the Strait of 

 Magellan. This is a curious species, the longitudinal ribs being 

 quite obsolete on the lower half of the body-whorl ; while, at the 

 periphery, there is one series of revolving tubercles, and the size is 

 only 4 mm. 



Voluta (Cymbiola) ancilla Soland. — One very large dead speci- 

 men. Gould gives a capital figure of the animal, but, like Sowerby 

 and Kiener, describes this species as V. magellanica {iwn Lm.). It is 

 , V. gracilis Wood. D'Orbigny records it from Strait of Magellan, 

 and Paetel from coasts of Patagonia. 



V. (C.) becki Brod. — Two; one quite juvenile (PI. I., fig. n); 

 the other a full-grown specimen, measuring a little over nine inches in 

 length, with, presumably, about an inch of apex missing. It is 

 yellowish chestnut in colour, with longitudinally undulated streaks. 

 In the Philadelphia Academy of Natural Sciences there is a specimen 

 measuring 14 inches in length (Tryon). Hitherto the precise habitat 

 of this large species appears to have been unknown, though generally 

 assigned to Patagonia. Its occurrence in this collection is, therefore, 

 of particular interest. 



V. (C.) magellanica Lm. — One small specimen. Patagonia 

 (Paetel). 



Euthria antarctica Rv. — Two, quite typical. 



E. fuscata Brug. — This species was described originally by 

 Bruguiere as a Buccinum, and recorded as occurring abundantly on the 

 coast of Peru. In Mrs. Blake's collection there are many examples, 

 in all stages, while in the Cobb collection there are but two, both 

 typical. 



E. plumbea Phil. — One rather young example of what appears to 

 be this species, which occurs from Cape Horn to Chili, also Japan. 

 Its synonyms are Fusus rufus Homb. & Jacq., Buccinum magellanicum 

 Phil., B. patagonicum Phil., and, probably, Euthria ferrea Rv., and 

 E. viridula Dkr. 



Trophon albolabratus E. Sm. — One, quite typical, and in good 

 condition. Although Tryon unites this with the very variable 

 T. geversianus Pallas, he seems to have been somewhat hasty in his 

 decision, for he admits that he has never seen the species, which Mr. 



1 Manchester Memoirs ; vol. 42, no. 4, p. 14, pi. 1, fig. 17, 1898, 



