404 GASTROPODA. [Pectinibranchia. 



Diameter, 11 mm. ; height, 24 mm. 



Animal unknown. 



Type in the collection of the J. de Conch.. Paris. 



Hah. A single specimen, found at Waikanae Beach by Mr. T. W. 

 Kirk, is in the Dominion Museum. Australia and Tasmania. 



Fossil in the Pliocene. 



This is Typhis zealandica, Huttou (C. Tert, M. : 2). Adult speci- 

 mens have the canal partly closed. 



Var. eos, Hutton. 1873. 



Murex eos, Hutton, C.M.M., 8 ; J. de Conch., xxvi. 12. M. Anqasi, C'rosse : 

 Hutton, M.N.Z.M., 47 ; not of Oosse. 



Distinguished fiom the species by its more robust and solid habitus, 

 its bright yellowish-pink colour, and the somewhat larger size it attains. 

 The base is always distinctly spirally unequally lirate, a character 

 much less prominent and sometimes obsolete in the species. 



Diameter, 10-5 mm. ; height. 25-4 mm. (type). Diameter. 14 mm. ; 

 height, 27 mm. (large specimen). 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



Hob. Bay of Islands (C. Traill). 



Remarks. This shell is not identical with M. Angasi, Crosse, but 

 the differences are, in my opinion, not sufficient to entitle M. eos to 

 specific rank. Since its discovery by the late Mr. C. Traill it has 

 been found by many other collectors, and Mr. C. Cooper, of Auckland, 

 was fortunate enough to find a live specimen. 



Genus 2. TROPHON, Montfort. 1810. 



Trophon. Mtft., Conch. Syst., ii, 1810, 482. Type : Buccinum Geversianum, 

 Pallas. Muricidea, Swainson, 1840 (in part). 



Animal having the foot elongated oval, tentacles subulate, with 

 the eyes near the base. Radula the same as in Murex. 



8hell more or less fusiform, with numerous lamelliform or laciniated 

 varices, the interstices smooth or spirally ribbed : spire prominent : 

 aperture ovate ; canal open, usually turned to the left, moderately 

 long ; columella smooth ; outer lip simple, with a tubercle close to 

 the canal. Operculum shows in the larger species the peculiar rotating 

 imprint on the proximal face which is usually regarded as charac- 

 teristic of Purpura, but smaller species with thin opercula do not 

 always develop this marking ; the nucleus is on the outer side, between 

 the middle and lower angle, with a callus around the inner margin. 



The species of the genus are found in austral and boreal seas. The 

 latter show more variety, and have developed several types among 

 themselves, all different from the antarctic group. 



Fossil in the Upper Tertiary. 



