OF CONCHOLOGY. 171 



3. LuTRARiA COSTATA, Tryon. — Plate 16, fig. 6. 



Description. — Shell elongately ovate, rather arcuate, middle 

 surface compressed, broadly rounded at the end margins, irreg- 

 ularly concentrically ribbed, thin, white. 



Length 27, width 52 mill. 



^a5.— Senegal.— Dr. R. E. Griffith. 



Remarks. — This shell is most nearly allied to L. inipar, Des- 

 hayes, from Australia, which has the same concentric wrinkles 

 or ribs, more prominent at the ends, but that species is wider 

 and the ends are truncately squared. 



TELLINID^. 



4. HiATULA NiTENS, Tryon. — Plate 16, fig. 9. 



Description. — Shell ovately transverse, somewhat inequila- 

 teral, convexly flattened over the umboes, sides and ventral 

 margin well rounded, thin, purple, with a very thin shining horn- 

 colored epidermis, purple within. 



Length 26, width 50 mill. 



ffab.—New Zealand.— Dr. T. B. Wilson. 



Remarks. — We possess a single specimen of this beautiful 

 species. It has some of the characteristics of H. nitida, Gray, 

 from the same locality, but is more swollen, and is not angled 

 and acuminated posteriorly. 



5. Sanguinolaria Robertsii, Tryon. — Plate 16, fig, S. 



Description. — Shell ovately transverse, rather thin, swollen, 

 impressed flexuously from the umboes to the posterior ventral 

 margin ; beaks prominent, narrow. White, tinged with delicate 

 rose color under an extremely thin, fugatious horn-colored 

 epidermis. 



Length 24, width 37 mill. 



Hah — Philippines. 



Remarks. — This species is nearly related to S. sanguinolenta, 

 of the West Indies, but is smaller, more delicate and more con- 

 vex. 



PECTINID^. 



6. Pecten Ruschenbbrgerii, Tryon. — Plate 14, fig. 1. 

 Description. — Shell suborbicular, somewhat inequilateral, 



