SCAPHELLA. Ill 



There seems to have been some difficulty in deciding what 

 should be the type species of Scaphella. On reviewing the subject, 

 Professor DalP emends the genus and selects S. undulata, Lamarck ; 

 that species, however, clearly falls in Anioria, Gray,- and is not, 

 therefore, available for a typical Scaphella. In a subsequent work 

 Professor Dall ' quotes Valuta junonia, Hwass, as the type, which 

 species was included by Swainson in his genus, and that view 

 is accepted in this work. 



Ty-}}^- — Voluta junonia, Hwass. 



Scaphella maccoyi, Tcnison-Woods (sp.). 



1877. Voluta m'coyi, Tenison-Woods, Pap. Roy. Soc. Tas. 1876, p. 95. 



1878. Voluta m'coi/i, E. Etheridge, jun., Cat. Aust. Foss. p. 170. 



1888. Voluta agnewi, Johnston, Geol. Tasmania, pi. xxx. fig. 9 {non 1880. 



Pap. Roy. Soc. Tag. 1879, p. 37). 



1889. Voluta m'coi/ii, Tate, Trans. Roy. Soc. South Aust. vol. xi. p. 126, 



pi. ii. fig. 2. 

 1895. Voluta m'coi/ii, Tate and Dennant, id. vol. xis. pt. 1, p. 111. 



This, and S. polita are very distinctive species, differing from 

 all other Australian members of the family here described in 

 being smooth and polished, and in possessing true Scaphelloid 

 protoconchs. S. maccoyi has a thin shell, minutely striated by 

 lines of growth and flatly depressed near the suture ; columellar 

 plications four in number in the brephic and neanic stages, but 

 frequently five in the ephebic, due to the development of a small 

 plication posteriorly ; the plications are more oblique in the young 

 than in the adult forms ; outer margin thickened and reflected 

 outwardly. 



Dimensiotis. — Length 44 mm. ; breadth 18 mm. ; length of 

 aperture 26 mm. 



Form, and Loc. — Eocene : Yictoria. 



G. 4256. Three examples of the adult, one of which is 

 extremely lanceolate and furnished with five stout columellar 

 plications ; from Muddy Creek. Presented hj John Bennant, Esq. 



G. 5487. Three specimens ; from Muddy Creek. Purchased. 



* Bull. Museum Comp. Zool. Harvard, vol. xviii. 1889, pp. 147-8. 



* Proc. Zool. Soc. 1855, p. 64. 



' Trans. Wagner Free Inst. Sci. Philad. vol. iii. 1890, p. 79. 



