STROPHOCHEILUS. 123 



A variety minor, alt. 75-80, diam. 45 mill, was found by Dr. Borelli 

 at San Lorenzo, prov. Jujuy. The shell in these specimens has not 

 the extraordinary thickness of some examples from the La Plata val- 

 ley and Uruguay, in which the peristome in particular is extraordi- 

 narily developed. Entre-Rios prov. (Ancey, t. c., p. 12.) 



At Fray Bentos, on the Uruguay river, Dr. W. H. Rush collected 

 the typical large form of oblongus, and also a small, obtuse race, solid, 

 with small aperture and brilliantly colored thick peristome, referable 

 to S. capillaceus intertextus (Nautilus x, p. 78). 



Probably Melania carnatis PERRY, Conchology, pi. 29, f. 3 is 

 identical* with S. oblongus. 



The following varieties of S. oblongus are recognized : 



Var. crassus Albers. Parana region (Orbigny, Giilich) ; Concep- 

 cion, Uruguay (Lorentz ; DOERING, Periodico Zoologico ii, pt. 4, 

 1877, p. 253). 



Var. alba Smith. As large as the type, but pure white, lip rose- 

 pink. Pampa Ruis, Bolivia (Orbigny). 



Var. albolabiatus Smith. Island of Tobago. 



The synonymy of this variety is as follows : Borus oblongus var. 

 albus Miill., W. G. BINNEY, Ann. N. Y. Acad. Sci. Hi, p. 115 (jaw 

 and teeth ; shell not described) Bulimus oblongus var. albolabiatus 

 E. A. SMITH, Proc. Malac. Soc. Lond. i, p. 137 (1894). Stropho- 

 cheilus oblongus var. tobagoemis PILSBRY, Man. of Conch. (2 Ser.) 

 x, p. 30, pi. 14, f. 70 (1895). 



S. CAPILLACEUS var. INTERTEXTUS Pilsbry. Vol. x, p. 32. 



This variety was taken by Dr. Wm. H. Rush at Fray Bentos, on 

 the Uruguay river, with S. oblongus. It is widely separated geo- 

 graphically from S. capillaceus seneri (Jouss.), which has a pale 

 peristome. 



S. SANCT^PAULI v. Iher. & Pils. PI. 20, fig. 63. 



Shell subperforate, much more slender and elongated than S. 

 oblongus, not compressed between face and back; with narrow, pro- 

 duced spire. Whorls 6, the earlier ones sculptured as in S. oblongus. 

 Substance of the shell reddish, with light subsutural band and ill-de- 

 fined yellowish basal area ; cuticle persistent though very thin ; sur- 

 face costulate as in S. oblongus, but the later two whorls have no 

 microscopic granulation. Aperture small, about half the shell's 



