98 Bulletin 29 262 



Strombina caribcea Gabb 



Plate 15, Figure 6 



Strombina caribcea Gabb, Trans. Amer. Phil. Soc. vol. 15, p. 221, 1873. 

 Astyris caribcea Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 6, p. 1584, 

 1903. 



We have a metatype of this unfigured, greatly thickened 

 species, distinguished from the other Dominican Strombinas of 

 similar size by the single hump, the Ranella — like flattening, and 

 the entire absence of longitudinal ribs. The shell occurs also at 

 Bowden. 



Strombina Neustrasenorcs, n. sp. 

 Plate 15, Figure 11 



Shell with seven whorls, the first two smooth, nuclear, the 

 third with minute oblique riblets, the fourth and fifth with verti- 

 cal riblets, sixth and seventh volutions smooth; on the last 

 whorl behind the varix of the lip is an oblique hump and on the 

 left side of the body, opposite to the outer lip, are two longitud- 

 inal wrinkles; at the base of the shell are a number of impressed 

 spiral lines; outer lip with a conspicuous, thickened margin as- 

 cending to the suture, and with six internal denticles; inner 

 lip encrusted with callus; collumella rugose with six short, trans- 

 verse plications; canal short, sharply refiexed. Length 8, width 

 4.50 mm. 



This pretty species is characterized by its curious thickened, 

 ascending outer lip. 



Locality. — (Exp'd '16) Zone G, Rio Guraboat Los Quema- 

 dos. (Rare). 



Strombina divilitus Harris and Maury, n. sp. 

 Plate 21, Figure 12 

 Strombina exilis Gabb, Jour. Acad. Nat. Sci. Phila., vol. 8, new ser. p. 

 356, pi. 46, fig. 41, 1874 — 1881. Not Strombina exilis Gabb, 

 Trans. Amer. Phil. Soc. vol. 15, p. 222, 1873. 

 As noted under Anachis exilis Gabb, two very different 

 shells were named by Gabb Strombina exilis. The Santo Do- 

 mingo shell retains this name and the Pliocene species from Costa 

 Rico we have renamed divilitus. 



