39 MOLLUSCA. 
which exists here * in every adult specimen of this species being thus enlarged toa 
distinct notch; also the projection of the lower end of the columella is somewhat 
stronger than in normal specimens, perhaps increased by new secretion during the 
restoring process. Surely it is neither an Alcadia, nor belongs to 1. tenuis. 
H. turbinata is also quoted by Tate (Am. Journ. Conch. v. p. 159) as found in 
Nicaragua at Toro Rapids: 1 suppose this is an erroneous determination, as this 
Mexican species has never been found even in Guatemala, which has been explored 
by so many collectors; perhaps it was the common ZH. tenuis (vernalis). 
9. Helicina sinuosa. 
Helicina sinuosa, Pfr. in Zeitschr. f. Malak. 1850, p. 191°; Martini & Chemnitz, Syst. Conch.-Cab. 
ed. 2, Helicina, no. 94, p. 70, t. 10. figg. 7, 8°; Monogr. Pneum, Vivent. i. p. 369°; Gray, 
Cat. Phaneropn. p. 267 *. 
Hab. Mexico #4 (coll. Cuming } ?). 
Not again found ; perhaps only an aberrant variety of the preceding. 
10. Helicina deppeana. (Tab. I. fige. 7; 8, var.) 
Helicina turbinata, var., Pfr. in Martini & Chemnitz, Syst. Conch.-Cab, ed. 2, Helicina, no. 46, 
p. 40, t. 8. figg. 1, 2°. 
Helicina deppeana, v. Mart. in Monatsb. d. Berl. Akad. Novemb. 1863, p. 540°; Malak. Blatt. xu. 
p- 6, t. 1. figg. 11, 12 (1865) *°; Pfr. Monogr. Vivent. iii. p. 229 *. 
Helicina cordillere (part.), Sow. Thes. Conch. iii. t. 273. fig. 270°. 
Hab. E. Mexico: Mexico 5, without nearer indication (Deppe??*); Jalapa (IZ. Trujillo); 
Soledad (Hoge); Yalalag, south of Villa Alta, State of Oaxaca (Hége). 
Distinct from H. zephyrina by its broader, conical, subangulate form, and the some- 
what more prominent basal tubercle of the columella, by which the adjoining part of 
the lower edge of the aperture appears slightly notched. ‘The typical specimens 
collected by Deppe are unicolorous, somewhat worn (fig. 76); fresh ones from Yalalag 
are pale rose-colour, with white, more or less reticulated, lines and two rows of some- 
what darker spots, one below the suture, and one above the angle of the last whorl 
(fig. 8). 
11. Helicina cordillere. 
Helicina cordillere (Sallé), Pfr. in P.Z. 8. 1856, p. 823*; Monogr, Pneum, Vivent. ii. p. 193°; 
Sow. Thes. Conch. iii. p. 288, t. 272. figg. 264, 265 (not t. 278. fig. 270)? ; Reeve, Conch. 
Icon. xix., Helicina, t. 16. fig. 143* & t. 17. fig. 149. 
* Sowerby, Thes. Conch. iii. t. 268. fig. 96, and Reeve, Conch. Icon. xix., Helicina, t. 3. fig. 20, represent, 
under the name of H. sinwosa, a distinct angulate shell with coarser sculpture, which is perhaps a similar 
deformity of another species. 
