72 



I think it almost certain that 0. Brazieri, Angas (fig. 41), is 

 merely a larger, less distinctly marked variety of the same 

 species. 



0. TRITICEA, Duclos. PL 17, figs. 42-44. 



Yellowish white, with three revolving rows of chestnut-brown 

 maculations. Length, 10 mill. 



New Guinea (Duclos); Port Jackson, Australia, 



5 fathoms (Ad. and Ang.). 

 0. pardalis, Adams and Angas (fig. 44), is a synonym. 



0. LEUCOZONA, Ad and Ang. PI. 17, fig. 45. 



Yellowish brown, longitudinally reticulated with chestnut, 

 with a bluish white band above the fasciole, tinged with chestnut 



at the base. Length, 15 mill. 



Port Jackson, Australia, 6 fathoms. 



Besides the difference in painting, this species has a longer 

 spire and is larger than 0. triticea. 



O. NYMPHA, Ad. and Angas. PL 17, fig. 46. 



Spire elevated ; semipellucid white, with an opaque white band 

 at the suture. Length, 10 mill. 



Port Stephens, N. 8. Wales, 5 fathoms (Angas); Mauritius 



(B. 8. Lyman); Sydney, N. S Wales, 25 fms. (Brazier). 



O. SIMPLEX, Pease, PL 17, figs. 47, 48. 



Pure white, shining. Length, 4-5 mill. 



Upolu and Tongataboo^ Polynesia. 

 0. nitens, Dunker (fig. 48), is a synonym. 



O. AUSTRALIS, Tenison-Woods. Australia. 



I have not seen the description of this species. It is unfigured. 



Genus OLIVA, Brug. 

 Subgenus Lamprodoma, Swainsnn. 



I commence with this small group rather than with the typical 

 Olives, because it appears to connect the latter with Olivella. 



Seven species are enumerated by Weinkauff, and one only of 

 these has the characteristic numerous transverse ridges on the 

 fasciole ; the others may be referred to Olivella. 0. volutella is 

 found in vast numbers over many acres on the sandy beach west 

 of the city of Panama; most numerous where the beach has a 



