696 STUDIES ON AUSTRALIAN MOLLUSCA, xiii., 



It is hoped that the figures of the four species concerned, now 

 placed side by side for comparison, will relieve the misunder- 

 standing that has hitherto prevailed. 



TUGALIA INTERMEDIA Reeve. 



(Plate lii., fig.44.) 



Parmophorus infermedius Reeve, Conch. Syst., ii. 1842, p. 22, 

 PL cxxxix., figs. 5, 6; Id., Reeve, Proc. Zool. Soc, 1842, p. 50; Id., 

 Hutton, Proc. Linn. Soc. N. S. Wales, ix., 1884, p.371. Sub- 

 emargiynila intermedia Suter, Man. N.Z. Moll., 1913, p. 102, PI. 8, 

 fig. 6. Tngalia cinerea Sowerby, Thes. Conch., iii., 1863, p. 221, 

 PI. 249, fig. 15. Tugalia pannophoridea Sowerby, Thes. Conch., 

 iii., 1863, p. 221, PI. 249, fig. 16; Id., Sowerby, Conch. Icon., xvii., 

 1870,Pl.i.,fig.4a,not4b; M, Hutton, Man.N.Z. Moll., 1880, p.l06. 

 Subemarginula parmophoidea Harris, Cat. Pert. Moll. Brit. Mus., 

 i., 1897, p. 290. Tttgali elegans Gray, in Diefienbaoh, Travels in 

 N.Z., ii., 1843, p.240; Id., Revue Zool., 1844, p.355; M, von 

 Martens, Crit. List N.Z. Mollusca, 1873, p. 35. N ot Parmophorus 

 elegansGra,j, Annals of Philos., ix., 1825, p.l40( = Scutus unguis 

 Linn.). 



Hitherto, this species has not been clearly differentiated from 

 T. par7nophoidea. 1"he New Zealand foi'm is readily distinguish- 

 able by having the apex considerably nearer to the margin than 

 has the Australian shell. In T. intermedia, the sculpture is 

 finer, the shell is not so tall, and has a more marked sinus at 

 the anterior margin. Otherwise the two are much alike in size, 

 shape, and general appearance. The pair represent one another 

 on each side of the Tasman Sea, which neither crosses. 



In T. elegans, the concentric sculpture is described as forming 

 arched ribs across the radial striae, a point which, supported by 

 an exact locality. Great Barrier Island, fixes the identity of the 

 species. On the Banner Island shell, Gray founded a new genus, 

 which he spelt Tugali, apparently a misprint later corrected by 

 himself to Ihigalia.* 



* Gray, Guide to the Systematic Distribution of Mollusca in the British 

 Museum, Part i., 1857, p. 163. 



