68 OLIVELLA. 



(fig. 86), with two revolving series of maculations, often seen 

 upon immature specimens, 0. myriadina, Marrat, not Duclos 

 (fig. 81), 0. miliacea, Marrat (fig. 88), and 0. lactea, Marrat. 



O. MYRIADINA, Duclos. PI. 15, fig. 90. 



Spire prominent, showing six whorls ; pure white. 



Length, 3-4 mill. 



Panama. 



This is the smallest of the Olivellas, yet the number of whorls 

 and form of the shell indicate maturity. Duclos gives no localit} r , 

 but I venture to identify with his species the unfigured O.incort- 

 spicua, C. B. Ad., from Panama; a species which has been mis- 

 understood by Marrat and Kiister as has also been myriadina. 



0. JASPIDEA, Gmelin. PI. 15, figs. 91-94. 



Yellowish white, closely fasciculated with dark chestnut at the 

 sutures, and frequently above the fascicle also ; intermediate 

 surface closely reticulated and punctated, fasciole strigated with 



bright chestnut. Length, 12-18 mill. 



West Indies. 



0. piperita, Marr. (figs. 93, 94), is based on water-worn 

 specimens. 



O. TEHUELCHANA, d'Orb. PI. 15, figs. 95-91 ; PJ. 16, fig. 1 ; PI. 1 , 



fig. 6. 

 Pellucid white, with an opaque zone at the suture. 



-Length, 12-15 mill. 



San Bias, Patagonia. 



With this I unite 0. bullula, Reeve (fig. 1), said to be West 

 Indian, and 0. pur a, Reeve (fig. 97). 



O. FLORALIA, Duclos. PL 15, fig. 98; PI. 16, figs. 99, 100,2,3. 



Shell narrow, with acuminated spire ; spire yellowish- or 

 chestnut-tipped, body-whorl white, or with nearly obsolete, 

 distant chestnut zigzag markings. Length, 8-10 mill. 



West Indies. 



Distinguished from 0. jaspidea and 0. nivea by its narrow 

 form and elongated spire. It is the 0. oryza of Duclos, not 

 Lamarck, and 0. alba (fig. 98), and 0. plongata (figs. 99, 100), 

 of Marrat. 



