HELICINA. 30 
NicaRacua (Janson: young specimens). Probably also Toro Rapids, in the woods 
(Gabb: H. turbinata, Angas, Am. Journ. Conch. v. p. 159). 
Costa Rica (Gadd 23). 
This species has a wider geographical distribution than most others of the genus 
Helicina. It is easily recognizable by the thin shell and the sharp tooth-like projec- 
~ tion at the base of the columella. In size and colour it is variable. Most specimens 
are unicolorous—pale yellowish, greenish, or reddish ; but many have two reddish-brown 
bands, one near the suture, and one below the periphery. More variegated specimens, 
speckled with white, are before me from Teapa in Tabasco, and Cerro Zunil, Las 
Mercedes, and Chacoj in Guatemala. Sometimes the apex is vividly rose-coloured. 
In Guatemala Mr. Champion captured examples of it on both the Atlantic and 
Pacific slopes, at elevations from a little above the sea-level to 4000 feet; also at 
' Totonicapam, in the Los Altos region, at a much greater altitude. 
15. Helicina fragilis. 
Helicina fragilis, Morelet, Test. Noviss. ii. p. 17 (1851)*; Pfr. Monogr. Pneum. Vivent. i. p. 368’, 
& ii. p. 195°; Gray, Cat. Phaneropn. p. 266°. 
Var. Helicina elata, Shuttl. in Bern. Mittheil. 1852, p. 304 (Diagn. no. 3, p. 44) °; Pfr. Monogr. 
Pneum. Vivent. ii. p. 201 °. 
Var. Helicina merdigera (Sallé), Pfr. in P. Z.S. 1855, p. 1027; Monogr. Pneum. Vivent. ii. p. 202 ° ; 
Sow. Thes. Conch. iii. p. 287, t. 272. figg. 243, 244 (magnified) °; Reeve, Conch. Icon. xix., 
Helicina, t. 16. fig. 140". 
? Helicina, nov. spec., Strebel, Abhandl. Geb. Naturw. Ver. Hamb. vi. 1, p. 19, t. la. figg. 12, 
12a, & t. 2. figg. 12, 12a”. 
Hab. E. Mexico: Cordova, State of Vera Cruz (Jacot-Guillarmod®*°); Vera Cruz 
(Sallé7 8); Vera Cruz, dead specimens found on the beach (Strebel 11) ; Mexico 9 1°. 
W. Mexico: Omilteme in the Sierra Madre del Sur, State of Guerrero, 8000 feet (#7. 
H. Smith). 
N. GuateMa.a : Province of Peten 24, in the woods, under decayed leaves (Morelet ') ; 
.Teleman, in the valley of the Polochic (Stoll, Champion); Purula 4000 feet 
(Champion). 
I have compared Shuttleworth’s typical specimen of H. elata, from Cordova, with 
Stoll’s Guatemalan example, and the only differences I can find are, that the latter is 
a little larger, more intensely coloured, and has a somewhat broader peristome. 
This species resembles H. tenuis, but is much smaller. From H. flavida it is distinct 
by the dentiform prominence at the base of the columella, resembling that of Z. tenuis. 
Strebel’s unnamed species !! is closely allied, but somewhat larger and less elevated ; 
the drawing of the base of the columella, seen from below, agrees exactly with Shuttle- 
worth’s and Pfeiffer’s specimen of H. elata. 
5* 
