SOUTH AMERICAN OBELISCUS. 251 



tion is probably an error for 14, as that is a/bout the length 

 of his size figure. 



8. 0. SUBULIFORMIS (Moricand). PL 36, fig. 75. 



" Shell turrite, elongate, very narrow, smooth, glossy, 

 white. Whorls flat and numerous, the apex obtuse. Aper- 

 ture ovate, the lip acute. 



' ' This species, which appears to me new, is remarkable for 

 the great number of whorls, 14 in the individuals in my pos- 

 session, which do not appear to be adult, and also for its 

 greatly lengthened shape. It is thin, fragile, of a dirty 

 white color, glossy, almost without striae. The whorls of the 

 spire are nearly flat, the sutures not deep. Length 22, diam. 

 3 mm." (Moric.). 



Brazil: wood of St. Gonsalves, near Bahia (Moricand). 



Helix subuliformis MORIC., Mem. Soc. Phys. et d'Hist. Nat. 

 de Geneve, vii, p. 427, pi. 2, f . 3. Bulimus s., POT. et MICH., 

 Galerie des Moll., i, p. 156, pi. 15, f. 15, 16. REEVE, Conch. 

 Icon., pi. 68, f. 486. PFR., Monogr., ii, p. 155. 



Very distinct by its extremely narrow figure. 



Species of Ecuador and Peru (Subgenus PROTOBELISCUS 



Fife.)- 



So far as I know, the following species belong to the sec- 

 tion Protobeliscus, which differs from Obeliscus by the ab- 

 ruptly truncate columella of the embryonic shell, pi. 37, fig. 

 102, 0. cuneus. It is more globose than the embryo of 

 Stenogyra (fig. 103) or Pseudobalea, and differs from the 

 corresponding stage in Obeliscus (fig. 100) and Neo'beliscus 

 (fig. 99) by its short form as well tas in the columella. Neo- 

 beliscus (fig. 99 natural size) has an enormously larger em- 

 bryo than any of the other groups. Protobeliscus is further 

 distinguished from typical Obeliscus by the rather thin, 

 smoothish shell, not so distinctly striate, and the longer 

 whorls. The type is 0. cuneus Pfr. 



The following key will probably be found of little practical 

 use on account of the variability of the species in size. 



