195 



Dimensions. — Height, 18; basal diameters, 13 '5 and 15. 



A single specimen of what may prove to be a distinct species 

 allied to T. chlorostoma, taken at Geographe Bay, W. Australia, 

 is of a biifi colour, except the red-tinged apical whorls, the 

 oblique stria? are obsolete, and the revolving lire© are replaced by 

 linear sulci. 



Calliostoma spinulosum, s/^ec. nov. Pi. i., fig. 7. 



Shell small, imperforate, broadly conical, pale reddish-yellow 

 with small white blotches ; whorls six and a-half, slightly imbri- 

 cating ; base almost Hat. 



Ornament of penultimate whorl consisting of three spiral lirai 

 crossed by equal-sized, stout, slightly obtuse, oblique ridges ; the 

 interstitial pits deep, rhombic, smooth ; the points of intersection 

 of the spirals and oblique cost?e are produced into spiniform 

 granules. The lirse diminish in size from the anterior to the 

 posterior suture ; the oblique ridges being as stout as the median 

 spiral. The spiral ridges on the body-whorl are increased by a 

 slender lira interposed between the first and the second, and by a 

 subperipheral lira nearly equal in size to the peripheral one, the 

 two together forming a truncated sulcated keel. Base with about 

 six concentric lira?, somewhat depressed, subacute, and showing a 

 tendency to subgranulose, crossed by strong radial growth-lines. 



Dimensions. — ^Height, 5 ; basal diameters, 4 and 4-5. 



Locality. — Moonta Bay ; one living example receive I from the 

 late Mr. McDougall. 



Affinity. — ^This exquisite little shell is readily distinguished 

 from all congeners, except C. ruhrojninctatum, A. Adams, by its 

 clathrate and echinate ornament ; from that species it would 

 seem to differ by its subimbricating whorls and fewer lirse. 



Euehelus fenestpatus, >ipec. nov. Pi. i., fig. 2. 



Shell imperforate, oval-conic, solid, thick ; spire conical, whorls 

 four and a-half, suture canaliculate by reason of the approxima- 

 tion of the infra- and supra-sutural lir^e. Aperture rounded, 

 oblique ; outer margin Urate, basal margin tuberculate. 

 Columella concave, its margin sharp and nearly straight, fur- 

 nished with a sharp tooth at the base succeeded by a deep basal 

 notch ; the first tubercle on the basal margin is equal in size to 

 the columellar denticle. 



Ornament of strong spiral ribs decussated by less elevated 

 oblique ribs, which cut the interstices into rhombic pits ; at the 

 intersections the spiral ribs are subnodulose. On the penultimate 

 whorl there are three lirae, the posterior one of which is much 

 smaller than the others ; the latter by their prominence give the 

 whorl a biangulate section. The body-whorl, the convexity of 

 which is only slightly interrupted, has six lirae, of the three in 



