BY C. HEDLEY 97 



behind the aperture to a few crowded riblets. Base flattened . 

 Umbilcus narrow, semicircular, deep, oblique, bounded by a heavy, 

 outstanding, obliquely-entering funicle. Aperture very oblique, 

 ovate. Lip thickened within. Columella united to the umbilical 

 funicle and spreading above a callous pad on the preceding whorl. 

 Major diameter 6, minor 5, height 2 mm. 



Hab. — Port Darwin; one specimen, collected from the beach 

 by Mr. Spalding, was communicated to me by Mr. J. Brazier. 

 Two young shells dredged in 1 1 fathoms off Bet Island, Torres 

 Straits, by Mr. Brazier appear to belong to the same species. 



Type to be presented to the Australian Museum. 



In the last volume of these Proceedings (p. 433) I described as 

 Teinostoma starkeyce the first Australian member of the subgenus 

 Soluriorbis. Professor Tate immediately followed with a second 

 one named Gyclostreraa caperatum (Trans. Roy. Soc. S.A. 1899, 

 p. 216, pi. vii. figs. la-b). The present is the third. Its affinities 

 are with T. starkeyce, from which it differs by spiral sculpture and 

 greater size, opacity and solidity. 



Notarchus glaucus, Cheeseman. 

 (Plate iv.) 



About five years ago I collected from time to time, at the edge 

 of a Zostera flat on the west side of Rose Bay, near Sydney, 

 several examples of the species now depicted. Most of them 

 were rolled up dead or dying from the injurious effects of the 

 volume of fresh water which heavy rains had poured into the 

 Bay. One, however, was found in a healthy and expanded con- 

 dition; from it my drawing was immediately made. 



I have referred, but not with certainty, the species to Aclesia 

 glauca, Cheeseman, judging it from the account given in the Proc. 

 Zool. Soc. (1878, p. 277, pi. xv. fig. 4). Further information is 

 required upon several points not notieed there; to supply which 

 I have endeavoured without success to procui'e specimens from 

 New Zealand, where I am told the species is rare. 

 7 



