BU1.LKTIN 39 



330 



Indian Conus Agassizi Dall, is abundant along the Banana 

 River and elsewhere in Costa Rica. 



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



Coeius cf. interstinctus Guppy Plate 3, figure 12 



Conus interstinctus Guppy, 1866, Quart. Jour. Geol. Soc. London, vol. 

 22, p. 2SS. pi. 16, fig. 3. 



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

 closely with Giippy'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-v;horls are smooth between 

 the sutures ljut also show a slight coronation. The last wdiorl 

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

 teriorly are sliglitly beaded. 



Dr. Maur\' unites interstinetiis, w'ith Sowerby's catenatus, 

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

 guishable specimen. We tlierefore prefer to compare the Costa 

 Rican shell wnth Guppy' s larger and well-figured i7iterstinctiis. 



Gati(7i Stage: Bajiana River, Hill No. i. 



Conus cf. Sewalli Maury 



Conus Se'cvalli 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- 

 sti7ictus in being shorter and broader, and the spire-whorls in 

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

 last whorl is sculptured with 15 or more wideh* spaced beaded 

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

 height 30, breadth 19 mm: 



Gatim Stage: Banana River. 



Conus ioroensis n. sp. 1 late 2, figure 7 



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

 y2 the length of the aperture; the whorls of the spire numbering 



