3*9 Dominican Fossils — Maury 155 



abounds on the Monte Cristi beach, showing many variations. 

 Locality.— (Exp'd '16) Bluff 3, Cercado de Mao. (Not 

 rare). 



Astralium Karlschmidti, n. sp. 

 Plate 24, Figure 18 



Shell high, trochiform, imperforate, whorls about five, slight- 

 ly concave, carinated at the periphery which bears about thirteen 

 short, dentate spines. Surface of whorls sculptured with many 

 close-set, very regular, fine, oblique threads, cut by three or four 

 impressed spiral lines near the margins of the whorls. Under 

 surface of shell with very numerous, fine spiral threads crossed 

 by still finer radial striae. Altitude of largest shell 15, greatest 

 diameter 18 mm. 



Localities. — (Exp'd '16) — Bluff 3, Cercado de Mao; Zones 

 H and I, Rio Cana at Caimito. 



Genus Caluostoma Swainson 



Calliostoma Grabaui, n. sp. 



Plate 24, Figure 19 



Shell pyramidal, pearly and iridescent beneath the surface, 

 whorls eight, ornamented with four or five stronger, sharply cre- 

 nate, spiral threads and among them two or three much finer, 

 beaded lines; whorls slightly convex, excavated a little at the 

 suture so that the sides of the shell do not not form an uninter- 

 rupted line from the base to the apex; periphery rounded, base 

 convex, perforate, ornamented with ten narrow, spiral ridges, 

 the wider interstices being strongly sculptured by lines of growth. 

 Altitude 18, diameter 19 mm. 



This rare and handsome Calliostoma is named in honor of 

 Professor Amadeus Grabau of Columbia University as a token of 

 regard. 



Localities. — (Exp'd '16) The Samba Hills, about halfway 



