86 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



striae extending nearly to the centre ; aperture narrowly linear, 

 wide below, outer lip slightly twisted and posteriorly produced, 

 inflected and angled in the centre ; inner lip anteriorly, with a 

 strong fold. 



Length, 3 lines ; breadth, 1| lines. 



Hab. Darnley Island, Torres Straits, 30 fathoms, sandy mud ; 

 Cape Grenville, North-East Australia, 20 fathoms, sandy mud. 



This species is like a miniature Atys elongata. Some speci- 

 mens have an opaque appearance at the back of the aperture, 

 others very thin and transparent. 



46. — Atys pulchra, n. sp. 



Shell cylindrical, white, thin (under the lens), longitudinally 

 closely plicated, and transversely very finely striated, giving the 

 shell a rugose appearance, very minutely umbilicated at both 

 ends ; aperture rather narrow, wide below ; outer lip thin, re- 

 flected inside, slightly posteriorly produced ; columella with a 

 slight curve, minutely expanded and reflected, leaving half the 

 umbilicus covered. 



Length, 3 lines ; breadth, 1| lines. 



Hab. Darnley Island, Torres Straits, 30 fathoms, sandy mud. 



A pretty little species, having the whole surface of a rugose 

 appearance, the transverse sculpture being quite distinct. In 

 some specimens the columella is sometimes straight and not 

 curved. 



47. — Atys densa, n. sp. 



Small, oval, thick, dirty white shell, finely plicated, strongly 

 transversely striated ; interstices with finer lines (as seen under 

 the lens) ; aperture narrow, wide below ; outer lip regularly 

 arched, posteriorly produced, anteriorly twisted and produced, 

 partly covering the umbilicus. 



Length, 2 lines ; breadth, 1% line. 



Hab. Darnley Island, Torres Straits, 30 fathoms, sandy mud. 



48. — Atys dubiosa, n. sp. 

 Shell small, oval, white, thin, shining, umbilicated at both 

 ends, the one at the base the largest, transversely very finely 



