190 



not one of them will exclude it from Sipho, though the facies is 

 not proper to this genus ; here I tentatively place it, awaiting 

 fuller material to determine its proper classiticatory position. 



Columbella (Mitrella) vineta, smc. nov. PI. i., % ii. 



Shell small, narrowly oval, shining light-horn (dead shells 

 wdiite) w^ith a revohing red or hroivn hand next to the anterior 

 suture. Nuclear wdiorls one and a-half, smooth, globose, with a 

 small blunt tip. Spire-wdiorls five, very slightly convex (abruptly 

 but feebly so at the posterior suture). Aperture oval, outer lip 

 7-dentate within. 



Dimensions. — Height, 9*5 to 10 ; diameter, 4-25. 



Localities. — Fowler and Streaky Bays, Middleton, and Cape 

 Northumberland, S. Australia ; also north coast of Tasmania. 



This species in respect of coloration is readily recognised by 

 its brown l^and, which though of variable width is always mar- 

 gined w^ith white at the posterior suture ; the band is usually 

 uninterrupted, but is occasionally scalloj)ed at its posterior mar- 

 gin, or at both margins on the body-whorl. In shape and size it 

 is near C. dictua, Ten.-Woods, but is narrower, and the whorls 

 are not so flat ; also near C. lineolata, Pease, but is much 

 narrower. The proportion of height to width is, in C. vineta, 

 100 to 45 and 42-5 ; in C. dictua, 100 to 47. 



Cepithiopsis marmorata, -^pec. nov. 



Shell elongately acuminated, marbled with white and brown, 

 encircled by rounded cinguli and axially striated in the intervals. 

 On the posterior whorls there are four cinguli ; five on the 

 penultimate ; five on the body-whorl posterior to the periphery, 

 with or without a slender one interposed between the first and 

 second from the suture ; the base wdth one cingulus in front of 

 the periphery. 



Dimensions. — Height, 15 (estimated) ; width, 3'25. 



Localities. — Head of Great Australian Bight, Streaky and 

 Fowder Bays, St. Vincent Gulf, Middleton, Cape Northumber- 

 land. 



Affinity. — This species is more elender than C crocea, and 

 stouter than C. purpurea, but with a distinctive coloration. 

 In ornament it approximates to C. crocea, but appears to have 

 more cinguli on the body-wdiorl. 



Bittium estuarinum, s/?ec. nov. PI. v., fig. 12. 

 B. pyramidale,* Tate, m.s. 



* As the name pyramidale is already occupied in some closely-related 

 genera, e.g., Potamides and Cerithium, I have thought it safer to select 

 that of estuarinum, which is not in use for any species of the Family 

 Cerithiidfe, and thus avoid the possibility of duplication. 



