94 . MOLLUSCA. 
the original description, measuring 18 millim. in length, 8 in breadth, and 14 in length 
of the aperture, instead of 13, 54, and 10} respectively ; the subsutural white line is 
seen only on its upper whorls, not on the last. 
c. Coniformes. 
10. Streptostyla coniformis. (Tab. V. fig. 14, young specimen.) 
Spiraxis coniformis, Shuttl. in Bern Mittheil. 1852, p. 206 (Diagn. no. 2, p. 26)*; Notitiz Malae. 
ed. 2, p. 15, t. 5. fig. 6’; Pfr. Monogr. Helic. Vivent. ili. p. 474°. 
Streptostyla coniformis (Shuttl.), Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 48°; Strebel, 
Beitr. Mex. Land- und Siissw.-Conch. iii. pp. 6, 15, t. 8. figg. 6, 6 a, b (shell), t. 9. fig. 12 
(living animal), t. 6. fig. 3 (radula), t. 4. figg. 11-13 (anatomy) °. 
Streptostyla blandina, Crosse & Fischer, Journ. de Conch. xvii. p. 31 (1869) °; Fischer & Crosse, 
Miss. Scient. Mex., Mollusca, i. p. 28, t. 1. figg. 8, 8a"; Pfr. Monogr. Helic. Vivent. viii. 
p. 342°, 
Hab. E. Muxtco: Cordova (Jacot-Guillarmod 1-4, Sallé &*) ; Mirador (Strebel°, Sar- 
torius®, Berendt*); Coatepec (Dona Estefania®); Orizaba (Botteri’). 
Var. pfeifferi : spira elatiore. 
Achatina streptostyla, Pfr. in Zeitschr. fiir Malak. 1846, p. 159°; Monogr. Helic. Vivent. ii. 
p. 269"; Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Achatina, no. 66, p. 338, t. 37. 
figg. 3,4™. . 
Glandina streptostyla (Pfr.), Morelet, Journ. de Conch. iii. p. 41”. 
Spirazis streptostyla (Pfr.), Shuttl. in Bern Mittheil. 1852, p. 206 (Diagn. no. 2, p. 26)”. 
Streptostyla pfeifferi, Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 27"; Pfr. Monogr. 
Helic. Vivent. viii. p. 841 ”. 
Hab. Mexico: without nearer indication of locality (Liebmann °"). 
S. pfeifferi seems at first sight to be fairly distinguished from S. coniformis by the 
length of the spire (aperture to the whole length in S. coniformis=6: 7, in S. pfeiffert 
2:3, according to the original descriptions), the thinner shell, and the presence of dark 
streaks; but if we take into consideration the specimens described and figured by Strebel, 
one of which (fig. 6 6) is in the Berlin Museum, these differences lose their value by 
gradual transitions. The original specimen in Pfeiffer’s collection is really rather thin; 
but the author himself subsequently placed by the side of it, under the same name, a 
quite solid example, which in size and in the comparative length of the spire is inter- 
mediate between S. pfeifferi and S. coniformis, viz. 21 millim. long, 9 broad, aperture 
144 millim. 
ee 
11. Streptostyla conulus, sp.n. (Tab. V. fig. 15.) 
Testa anguste coniformis, solida, levissime striatula, flava, nitida ; spira mediocris, obese conica, apice obtusi- 
uscula; anfr. 7, convexiusculi, penultimus antepenultimo duplo altior, ultimus deorsum angustatus, ad 
aperturam non deflexus ; sutura simplex, fasciola pallide grisea (non sulco) notata; apertura anguste 
