41 



Port Jackson, to which on the label has been added " S. 

 Australia." 



Cominella Adelaidensis, Crosse !, is not separable specifically 

 from C. alveolata. It may, however, be regarded as a local 

 race. 



Columbella semiconvexa, Lamarck !, is correctly identified. 

 C. Torkensis, Crosse !, is a unicolorous variety, and C. infumata, 

 Crosse !, is a mere micromorph. 



Ancillaria marginata, Lamarck !, is rightly named. 



Cancellaria laevigata, Sowerby !, v. C. pur pur cef or mis, Valenc. 

 The type-specimens of the former are somewhat rolled, but one 

 large one is without costation. The British Musuem examples 

 of the latter are smaller, spirally lineated, and the spire-whorls 

 not costate. The absence or presence of costation on the pos- 

 terior whorls is thus not constant, and the absence of spiral 

 striation in C. laevigata may be due to obliteration by erosion. I 

 regard the two as conspecific, and would employ the name C. 

 purpur^eformis as the anterior of the two. 



Natica umbilicata, Quoy and Gaimard !, and Nactina picta, 

 Reeve !, are conspecific, as already suspected. The shell may be 

 located in the subgenus Stigmaulax, Morch, 1852, of Natica: 

 whilst Naticina nitida, Reeve, another South Australian shell, 

 becomes a Eunaticina, Fischer, 1885 Naticina, Gray, 1842 (non 

 Guilding, 1834). 



Thylacodes sulcatus, Lamarck. 



The South Australian vermitiform shell, thus named, agrees 

 with the type of Serpula sulcata, Lamk., and S. sipho of that 

 author is the same ; Vermetus arenarius, Q. and G. ! (non. Lk.) is 

 another synonym. 



Tryon (Man. Conch., VIIL, p. 179, t. 53, f. 64, 1886) rejects 

 the Lamarckian name in favour of V. novce Hollandice, Rousseau, 

 because " one of the three types of that species [S. sulcata] is a 

 fossil and different, the other two appear to be V. sipho." From 

 a personal inspection, I assert with confidence that the above 

 statement is not true ; S. sulcata and S. sipho are separately 

 labelled, though I regard them as one species ; it is true 

 Lamarck adds a note under S. sulcata, " se trouve fossile dans la 

 Touraine," but the fossil is not among the recent types. I regret 

 not being able to consult Vaillant's paper. 



The animal of our common tubiculate gasteropod exhibits the 

 same characters as described by Quoy and Gaimard for their 

 V. arenarius. But I may add that the oval egg-cases to the 

 number of 50 or 60 are attached by glutinous threads to inner 

 shell-wall ; about 20 matured embryos are contained in each 

 capsule. 



Turritella oxyacris, Tate, nom. mut. 



T. acuta, Tenison- Woods, 1876 (non Mayer, 1868). 



