﻿MOLLUSCA.-HEDLEY. 



109. 



Capulus calyptra, Martyn. 

 Patella calyptra, Martyn, Universal Conchologist, 1784, 

 pi. 18. 



On previous examination of this South Australian species^ 

 I pointed out that the Patella australiSy Lamarck, was really 

 a Capulus and had been wrongly transferred to Hipponyx by 

 later writers. Placing reliance on Watson's observation that 

 the apices of the two species turned in different directions, I 

 separated C. australis from C. danieli, Crosse { = C- calyptra, 

 Martyn). Further examination indicates that the direction of 

 the apex is not so constant a character. Weight was also 

 attached to the discrepancy of a tropical species occurring as 

 far south as Bass Strait. Since then I have learnt that there 

 is a drift of warm water species from Western Australia round 

 Cape Lewin and across the Bight. By this route it is 

 possible to trace C. calyptra back to the tropics. 



As C. danieli, Prof. R. Tate recorded this from South Aus- 

 tralia as a Tertiary fossil. 2 



Cerithiopsis dannevigi, sp. nov. 

 (Plate xix., figs. 26, 27.) 



Shell small, acicular, translucent. Colour pale buff, the 

 gemmule rows opaque white, apex translucent. Whorls 

 eleven, plus a four or five-whorled protoconch, separated by 

 deep sutures. Sculpture : On the earliest adult whorl are two 

 bead rows, subsequently another row anterior to these 

 develops and becomes fully established about the centre of the 

 shell, on the last whorl a fourth spiral without beads runs 

 along the angle and, as a thread, appears along the suture of 

 the upper whorls. The gemmules amount to about twenty- 

 two on the last whorl, are small and about their breadth apart. 

 Each gemmule of the median row is linked to its neighbour 

 above and below by a perpendicular bar, thus enclosing a deep 

 square pit in the interstice. Whereas the spirals are opaque, 

 the radials are translucent. Protoconch, first whorl smooth, 

 fourth with a median keel, remainder traversed by oblique 

 threads. Base excavate, aperture subquadrate, canal short. 

 Length 5' 5, breadth i mm. 



Named in honour of Mr. H. C. Dannevig, Director of 

 Fisheries, under whose direction these species were obtained. 



Hab. — Several specimens from 100 fathoms forty miles 

 south of Cape Wiles, South Australia. Also taken previously 

 bv Mr. W. L. Ma\ and self in 100 fathoms off Cape Pillar, 

 Tasmania. 



1 Hedley— Proc. Linn. Soc. N.S. Wales, xxvii., 1903. p. 601. 



2 Tate— Trans. Roy. Soc. S. Austr., xvii.. 1893, p. 334. 



