156 RKCORDS OF THE AUSTRALIAN MUSEUM. 



Prof. E. Forbes confirmed the identity of H. cyclostomata, 

 H. strangulata and H. tuckeri, he added a fresh habitat, Sunday 

 Island, a few miles west of Sir C. Hardy Island. ^^ 



Mr. E. A. Smith gave an obscure figure of II. cyclostomata, 

 reported it from Blackwood Bay, Cape York, and added as 

 synonyms, H. tiickeri, Pfr. and H. strangulata, Hombron and 

 Jacquinot. ^^ But in his subsequent report on the land shells 

 collected by Prof. A. C. Haddon in Torres Strait, he altered his 

 opinion and without explanation separated H. cyclostomata from 

 H. tuckeri, attaching H. strangulata to the latter. "° 



Those who united these three names paid no regard to the 

 discrepancy in the sculpture assigned to each ; H. cyclostomata 

 with elongate pa{)illse, H, tuckeri with short scattered bristles 

 and H. strangulata with numerous regular transverse striae. I 

 find that H. cyclostomata has a wide range both geographically 

 and in variation. It inhabits all the islands of Torres Strait 

 and both coasts of Cape York Peninsula. On Naghir Island I 

 collected specimens in which tiie grain sculpture had almost 

 disappeared, instead were fine radiating thread riblets, thus 

 showing that the II. strang^data sculpture is within the variation 

 range of H. cyclostomata. PfeifFer's definition " breviter et sparsim 

 pilosa " does not apply to any specimens that I have examined, 

 possibly he mistook the grains for bristles. Since, however, he 

 withdrew H. tuckeri as a synonym of H. cyclostomata, and 

 Macgillivray, who collected it agreed, I am content to accept 

 their judgment. 



Another form has been confused with the foregoing species. 

 I propose now to distinguish it as — 



Planispira truculenta, sp. nov. 



Planispira tuckeri, PiLsbry {non Pfeiflfer), Man. Conch., 2nd 

 ser., ix., 1894, pi. xix., figs. 18, 19. 



In shape, size and colour it agrees with P. cyclostomata, but it 

 is without the grained surface, has a more open umbilicus and 

 possesses a tubercle on the inner base of the aperture. Its 

 habitat is Port Curtis, Queensland, twelve degrees south of the 

 locality of the otlier species. An excellent figure of it has been 

 given under the title of Planispira tuckeri, Pfr., I)y Pilsbry. 



«8 Forbes— Voy. " Rattlesnake," ii., 1852, p. 370. 



B» Smith— Zool. "Erebus" and " Terror," Moll., 1874, p. 2, pi. iv.,fig. 13. 



«o Smith— Proc. Roy. Dublin Soc, 1890, p. 10. 



