43 Bulletin 39 ago 



Indian Corius Agassizi Dall, is abundant along the Banana 

 River and elsewhere in Costa Rica. 



Gatuii Stage: Banana River, Zone 6 Red Cliff Creek, C. R. 



Conus cf. interstinctus Guppy Plate 3, figure 12 



Conus interstinchis Guppy, 1866, Quart. Jour, GeoL Soc. London, vol. 

 22, p. 28S, pL 16, fig. 3. 



A single specimen from Hill i, of the Banana River, agrees 

 closely with Gupp5:''s figure of this Jamaican species. The shell 

 measures 39 by 20 mm. The spire is moderate in height, with 

 a slightly concave profile. The spire-whorls are smooth between 

 the sutures but also show a slight coronation. The last whorl 

 carries about 15 narrow, widely spaced, spiral cords which an- 

 teriorly are slightly beaded. 



Dr. Maur\' unites interstinchis, with Sowerby's catenatus', 

 but that species is based on a very young and scarcely distin- 

 guishable specimen. We therefore prefer to compare the Costa 

 Rican shell with Guppy' s larger and well-figured interstiyidus. 



Gaiun Stage: Banana River, Hill No. i. 



Conus cf. Sewalli Maury 



Conus Sewalli Maury, 1917, BulL Amer. Pal., vol. 5, . 201, pi. 5, fig. 3, 

 pi. 6, fig 3. 



The collection contains 2 young shells which may belong to 

 this Dominican species. They differ from the preceding inter- 

 stinctus in being shorter and broader, and the spire-whorls in 

 place of being smooth are marked with 5 or 6 strong spirals. The 

 last whorl is sculptured with 15 or more widelj' spaced beaded 

 spirals. The dimensions of the largest shell are: Length or 

 height 30, breadth 19 mm: 



Gatun Stage: Banana River. 



Conus ioroensis n. sp. Plate 2, figure 7 



Shell of medium size, with a conic spire a little more than 

 yit, the length of the aperture; the whorls of the spire numbering 



