38 MOLLUSCA. 
92. Helicina oweniana. (Tab. I. figg. 11, 12.) 
a. genuina : subelate conoidea, pallida, peristomate aurantio; subinde unifasciata (fig. 12). 
Helicina oweniana, Pfr. in P. Z. S. 1848, p. 128'; Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, 
Helicina, no. 48, p. 40, t. 7. figg. 35, 36°; Monogr. Pneum. Vivent. i. p. 373° (excl. var.) 
& ii. p. 199; Gray, Cat. Phaneropn. p. 270°; Sow. Thes. Conch. iii. p. 287, t. 272. figg. 
241, 242°; Reeve, Conch. Icon. xix., Helicina, t. 16. figg. 144°. 
Hab. S.E. Mexico: Chiapas (Ghiesbreght 1234); Teapa in Tabasco (H. H. Smith). 
b. coccinostoma: globoso-conoidea, alba, citrina vel fulva absque fasciis, peristomate coccineo. 
Helicina coccinostoma, Morelet, Test. Noviss. i. p. 19 (1849)"; Sow. Thes. Conch. iii. p. 289, t. 273. 
figg. 295, 296°; Reeve, Conch. Icon. xix., Helicina, t. 20. fig. 173 (magnified) °*. 
Helicina oweniana, var. 6, Pfr. Monogr. Pneum. Vivent. i. p. 373°; Gray, Cat. Phaneropn. 
p- 270". 
Hab. N. Guatemata: Province of Peten 4! (Morelet 7 1°). 
c. anozona : subglobosa, rubescens vel fulvescens, zona suturali pallida, peristomate luteo (fig. 11). 
Helicina oweniana, Tristr. in P. Z. 8. 1861, p. 233. 
Helicina anozona, v. Mart. in P. Z. 8. 1875, p. 649. 
Hab. N. AND CenTRAL GUATEMALA: Coban (Salvin 1213) ; Cubilguitz, Northern Vera 
Paz (Champion) ; Teleman, in the valley of the Polochic River (Stol/). 
These three forms can be well distinguished in the majority of specimens ; but there are 
_ also some others which are intermediate between them, either in colour or in shape. 
All those I have seen have a similar fine sculpture. 
23. Helicina notata. 
Helicina notata (Sallé), Pfr. in P. Z. S. 1856, p. 328, t. 35. figg. 18-20"; Monogr. Pneum. Vivent. 
ii. p. 203°; Sow. Thes. Conch. iil. p. 287, t. 272. figg. 2389, 240°; Reeve, Conch. Icon. xix., 
Helicina, t. 81. fig. 276 *. 
Hab. E. Muxico: Cordova, State of Vera Cruz (Sallé1?); Atoyac (Hoge); Mexico 3 4, 
Easily recognizable by a peculiar dark red spot on the back of the penultimate 
whorl above the suture, the rest of the shell being unicolorous yellow. The specific 
name probably refers to this mark; but it is not even mentioned in Pfeiffer’s descrip- 
tion, although visible in the specimens in his collection. The malleated surface is 
somewhat like that of many specimens of H. tenuis; the spiral ridges bring it near to 
HH. succincta. 
24. Helicina flavida. 
Helicina flavida, Menke, Synops. Moll. ed. 1, p. 79 (1828) *, ed. 2, p. 182 (1830)?; Sow. Thes. 
Conch. i. p. 9, t. 3. figg. 117, 184°, & iil. p. 287, t. 272. figg. 283-236'; Pfr. in Martini & 
Chemnitz, Syst. Conch.-Cab. ed. 2, Helicina, no. 52, p. 42, t. 1. figg. 31, 82, & t. 5. fige, 28- 
