674 THE VOYAGE OF H.M.S. CHALLENGEE. 



This species is much more attenuated in front than Dolabrifcra marmorca, Pease, from the 

 Sandwich Islands, which otherwise it much resembles in form and texture, whilst it is in sculpture 

 much more delicate. Dolabrifera maillardi, Deshayes, from the island of Bourbon (see Moll, de 

 Bourbon, p. 53, vol. vii. figs. 20—22), is much more regular in shape, more like the seed of our 

 common plane (Acer pseudo-platanus), with a regular-shaped wing and a head or nucleus continuous 

 with the body instead of, as here, a fleam-bike blade and distinct handle. 



Family Pleurobranchice, Gray, 1840. 

 Genus Umbrella, Lamarck, 1812. 



Umbrella mediterranean Lamarck. 



Umbrella mediterranea, Lamarck, Anim. s. vert., vol. vi. p. 343, and (ed. Desh.) vol. vii. p. 574, sp. 2. 



„ Deshayes, Encycl. method., vers, vol. iii. p. 663, sp. 2. 



„ Philippi, Enumeratio MolL Sicil.,vol. L p. 113, vol. ii. p. 88, pL vii. fig. 11. 



„ Cantraine, Malacol. Med., p. 92. 



,, Adams, Genera, vol. ii. p. 91, pi. lxi. fig. 3. 

 „ Weinkauff, Conch, d. Mittelm., vol. ii. p. 179. 



„ Monterosato, Enumerazione, p. 53. 



July 28-31, 1873. St Vincent, Cape Verde Islands. Harbour. 7 to 25 fathoms. 

 Habitat. — Mediterranean (Lamarck) ; Madeira (Watson). 



The embryonic apex of this shell is glossy, of a rich chestnut brown. It is placed a little to the 

 left side of the shell, and is directed backwards. Including the whole shell, there are barely two 

 whorls, and these are sinistral. 



Family SiphonariiDjE, Gray, 1840. 

 Genus Siphonaria, Sowerby, 1824. 



Species. 

 1. Siphonaria cancer, Eeeve. 2. Siphonaria (Liriola) tristensis, Sow. 



1. Siphonaria cancer, Reeve. 



Siphonaria cancer, Keeve, Conch. Icon., vol. ix. pi. ii. fig. 7. 



„ Hutton, Cat. Mar. MolL New Zealand, p. 55, No. 261*. 

 „ „ v. Martens, Crit. List., p. 40. 



„ „ Hutton, Manual, p. 36. 



June 26, 1874. D'Urville Island, New Zealand. Beach. 

 Habitat. — New Zealand (British Museum). 



