28 Bulletin 29 193 



whorls this shell recalls T. amitra Dall from Potrero, Rio Am- 

 ina; but it can be instantly differentiated from that shell by the 

 absence in amitra of any definite sub-sutural band and sulcus. 



Indeed T. Cambiarsoi is quite distinct from any of the many 

 Terebras in the Cornell Museum; but its sharply biplicate col- 

 umella and deep sulcus beneath the sub-sutural fasciole place it 

 in the T. bipartita group of which so many of the Santo Domin- 

 go Terebras are representatives. 



This species is named in honor of Senor Rodolfo D. Cambi- 

 arso, of Santo Domingo City, a most ardent student of the nat- 

 ural history and archaeology of his native island. 



Locality. — (Exp'd '16). A single specimen was found in 

 Bluff 3, Cercado de Mao. 



Terebra amitra Dall 

 Plate 3, Figure 21 



Terebra (Oxymeris) amitra Dall, Proc. U. S. Nat. Mus., vol. 18, no. 

 io 35) P- 39, !895; Trans. Wagner Inst. Sci., vol. 3, pt. 6, pi. 59, 

 fig. 19, 1903. 



We unfortunately did not collect any specimens of this rare 

 little Terebra, of which there is a single shell in the National 

 Museum. It measures 9.5 mm. in length and was collected at 

 Potrero, Rio Amina. 



Terebra protexta Conrad 

 Plate 4, Figure 1 



Cerithium protextum Conrad, Proc. Acad. Nat. Sci. Phila., vol. 3, p. 



26, 1845. 

 Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc, vol. 15, p. 



225, 1873. Not dislocata Say. Exclude synonymy. 

 Acus protextus Dall, Rep. Blake Gastr., Bull. Mus. Comp. Zoology 



Harvard Coll., vol. 18. pp. 63, 65, 1889. 

 Terebra {Acus) protexta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, 



p. 25, 1890. 



Shell small, slender, elongate, whorls sculptured with about 



