311 



NOTES ON SOME MAEINE SHELLS FROM NORTH-WEST AUSTRALIA, 

 WITH DESCRIPTIONS OF NEW SPECIES. 



By EDGA.R A. Smith, P.Z.S., etc. 



Read U'h May, 1899. 



1. Cancellakia E-EEVEAifA, Crosse. 



Hah. — Eoebuck Bay, I^orth-west Australia (J. J. Walker). 



A single specimen from this locality, collected by Mr. J. J. Walker, 

 of H.M.S. "Penguin," is interesting on account of the total absence 

 of colour, being snow-wbite both externally and within the aperture. 

 In form and sculpture it is quite normal. The typical form occurs at 

 the Philippines and Japan. Mr. Tryon, in his monograph of this 

 genus, placed this species as a variety of C. asperella, Lam., and also 

 included under that species C. Sinensis, Eeeve, and C. melanostoma, 

 Shy., from Aden.^ 



Although they exhibit a general resemblance to one another, 

 I certainly think these forms may be separated. The distinction 

 between C. asperella and C. Reeveana has already been pointed out 

 by Crosse,* and C. melanostoma has differences of form, sculpture, and 

 colour. C. Sinensis is very unsatisfactory, being founded on a single 

 distorted shell in the Cuming Collection. It certainly very closely 

 approaches C. melanostoma in many respects, but has not the 

 characteristic brown callus on the columellar side of the aperture. 



2. CoRALLiOBiA FiMBEiATA, A. Adams. Fig. II. 



Concholepas (^CoraUiohia) fimhriata, A. Ad. : Proc. Zool. Soc, 1852, 



p. 93. 

 Magilus fimhriatus (A. Ad.): Sowerby, Conch. Icon., vol. xviii, pi. iii, 



figs. 9«, b. 



Sab. — Mindanao, Philippines (Cuming); Mauritius (Bobillard) ; 

 Macclesfield Bank, China Sea, 30-50 fathoms (Bassett-Smith). 



A specimen from the last-named locality is of interest as showing 

 the character of the upper whorls and only very little of the 

 cancellation, which is characteristic of the typical specimens. The 

 spire consists of four very small whorls, of which the apical one is 

 smooth and globose, the second has a single keel or angle, whilst the 

 third and fourth have two spiral ridges. The body-whorl, which is 

 enormous in comparison with the spire, spreads out into a subcircular, 

 much flattened disc, and is very finely radiately striated, only the first 



1 Smith: Proc. Zool. Soc, 1891, p. 410. 



2 Journ. de Conch., 1861, p. 237. 



