152 RECORDS OF THE AUSTRALIAN MUSEUM. 



Thais ambustulatus, sp. nov. 

 (Plate xliv., fig. 37). 



Shell of a medium size, very solid, biconical. Colour cream, 

 stained with chocolate ou the peripheral projections. Whoils 

 seven. Sculpture : six prominent perpendicular ribs appear on 

 the periphery, but fade away above and below, on the spire these 

 are represented by peripheral knots. Dense spiral threads 

 surround the shell at the rate of about fourteen on the penultimate 

 and thirty-two on the last, a pair at the periphery and two or three 

 below much exceed the rest in size. AH these are overrun by 

 small close scales. Columella, broad and smooth. Outer edge 

 of lip wrinkled by external sculpture, deeper within lie four small 

 tubercles. Behind the short and broad canal is variously 

 developed an axial cavity. Length, 33 ; breadth, 22 mm. 



No other Australian shell seems close enough to be worth 

 comparison with this. Under my manuscript name this s))ecies 

 is included in a list of additional Queensland species by Mr. J. 

 Shirley.*^ I may take this opportunity to suggest that though 

 much valuable information is conveyed in this list, yet in many 

 cases Mr. Shirley has been misled by correspondents who furn- 

 ished him with foreign shells. From Torres Strait especially 

 several exotic species are noted, among which the European 

 Gibhula inagus is a glaring example. Our surprise at finding 

 Cyjircea onyx in an Australian Catalogue is not lessened by 

 observing that it is reported from an inland locality — Burketown. 

 By restricting his records to his own experience Mr. Shirley 

 might have avoided adding a fresh water shell, Neritina 

 pulligera, to the marine fauna ; or a synonym for an additional 

 entry, as Austriella sordida, Teuison Woods, for Lncina contigata, 

 Deshayes. 



Hab. — Caloundra, Queensland, on rocks (Kesteven and 

 Shirley) ; Ballina, N. S, Wales (Hedley), and Trial Bay (Laseron). 



Cassidula nucleus, Martyn. 



Limax nucleus, Martyn, Universal Conchologist, 1784, pi. 67, 



outer figures. 

 The identity of this species has been the subject of debate. 

 Dr, von Martens made a critical examination*" of Martyn's work 



*5 Shirley— Proc, Roy. Soc. Q'land., xiii., 1911, p. 102. 

 *« Martens— Malak. Blatt., xix., 1S7'2, p. VI. 



