708 STUDIES ON AUSTRALIAN MOLLUSCA, xiii., 



tentacles are long and slender, having an ocular bulb at their 

 outer base. From the eye, a crest of muscle runs backward to 

 the shell. In the female(Fig.l9), there is a small lobe and sinus 

 on the right side of this crest. But the male has a large, intro- 

 mittent organ rooted on the median side of the right tentacle, 

 and carried round below the eye to the back of the neck(Fig.l8). 

 There is no epipodium. Outside the mantle-margin there is a 

 peripheral row of longer and shorter papill?e, corresponding to 

 the radials of the shell; on further magnification, these papillae 

 are seen to be beaded. 



Since writing the above, I have gathei-ed P. cinnamomea 

 under stones at the mouth of the Annam River, near Cooktown, 

 Queensland. 



The other Australian members of this genus are: — P. senta 

 Hedley, 1899, Ma.Ych { = P. lingua-viverrce Melvill k 8tanden, 

 1899, July); P. reticulata Thiele, 1909; P. mirabilis Sowerby, 

 1910; P. calva Verco, 1906; P. alboradiata Verco, 1906; P. 

 crenulata Broderip, 1834; and P.galathea Lamk., 1819. 



Patelloida nigrosulcata Reeve. 



Patella nigrosulcata Reeve, Conch. Icon., viii,, 1855, PI. xxx., 

 fig.84. Accrued patellavecta Verco, Trans. Roy. Soc. S.A., xxxvi., 

 1912, p.l95, PI. XV., figs.5-7; PI. xvi., fig.5. 



At the conclusion of an excellent description of this species. 

 Dr. Verco noted that the West Australian material dealt with, 

 resembled P. nigrosulcata, and might eventually prove to be that 

 species. Mr. T. Iredale, under date 13/9/15, writes, "Specimens 

 of Verco's shell have been received at the British Museum, and 

 I compared them, with Mr. Edgar A. Smith's assistance; we 

 agree that the identity is absolute." 



Cerithium mysterium, nom.mut. 



Gerithium tomlini Hedley, Proc. Linn. Soc. N.S.Wales, xxxix , 

 1914, p. 717, PI. Ixxxv., fig.89; not Cerithium tomlini Preston, 

 Journ of Malacology, xii., 1905, p. 3, PI. i., figs. 11, 11a. 



Mr. J. R. le B. Tomlin, to whom this species was dedicated, 

 has reminded me that, in this compliment, I have been antici- 



