BY C. HEDLEY. 481 



are basal. Aperture subquadrate, terminating below in a blunt 

 tubercle. Height, 8; maj. diam , 8; minor diam., 7 mm. 



Adams states that the type was taken by Lieut. J. E. Dringat 

 Cape Upstart, North Queensland, under stones at low water. I 

 h ave taken a variety of this at Sweers Island, Gulf of Carpentaria. 



Cantharidus crenelliferus A. Adams. 



Thalotia crenellifera A. Adams, Proe. Zool. Soc. 1851 (1853), 

 p. 173; Ann. Mag. Nat. Hist. (2), xii. Sept. 1853, p. 204; Brazier, 

 these Proceedings, ii. 1877, p. 43. 



(Plate vii., fig. 5.) 



The British Museum cotype is a small shell, conical, angled at 

 the periphery and flattened on the base, the spire-whorls slightly 

 bulging at their periphery. Whorls nine. Colour rose-red 

 variegated by oblique flames of pale brown. Sculpture : the last 

 and antepenultimate whorls have nine spiral strings, the outer- 

 most larger, apt to run in pairs and separated by spaces broader 

 than themselves. They are crossed at a low angle by fine close 

 threads which in their passage bead the strings and lattice the 

 interstices. Base with half a dozen widely parted spirals ; here 

 the radials are finer and closer and chiefly affect the interstices. 

 Aperture subquadrate, columella abruptly truncate anteriorlj T . 

 "Within the base of the aperture is a bilobed callus ridge, a sort 

 of doorstep, and within the left margin another mass of callus. 

 Length, 10; breadth, 7 mm. 



The original description quotes the species from " Australia." 

 Brazier records it from 25-30 faths. off Darnley Island, Torres 

 Strait. A specimen from New Caledonia agrees well with the 

 cotype before me. This suggests that the unfigured Trochus 

 artensis Fischer* from New Caledonia may perhaps be a synonym. 



* Journ. de Conch. 1878, p. 208. 



