STREPTOSTYLA. 93 
Var. ventricosa. 
Streptostyla shuttleworthi, var. y, Fischer & Crosse, loc. cit. p. 42, t. 2. fig. 3°. 
Streptostyla shuttleworthi, var., Strebel, loc. cit. iii. t. 8. fig. 9a". 
Hab. E. Mexico: Orizaba (Sailé®); Nautla, near the sea-shore, dead specimens 
(Strebel *). 
Var. similis. 
Streptostyla similis, Strebel, loc. cit. iii. pp. 19, 50, t. 8. fig. 8, t. 12. fig. 7°. 
Hab. E. Mextco: Misantla (Strebel 8); Orizaba (Botteri ®); Vera Cruz (Shuttleworth, 
in mus. Berol.®). 
S.W. Mexico: Juquila (Hége). 
Var. quirozt. 
Streptostyla brevispira, Strebel, loc. cit. iii. p. 21, t. 8. fig. 3°. 
Hab. EB. Mexico: Tezuitlan and Misantla (Hége); Coatepec (Quiroz °); Miahuatlan 
(Dota Estefania °); San Antonio del Monte (Strebel). 
Rather variable in size and form, but constantly of a brilliant reddish-fawn-colour ; 
vertical streaks faint or wanting; columella rather thin and slightly twisted. Large 
specimens approach G. delattret, var. sallat. 
Spirawis bullacea, Pfr. [Malak. Blatt. xiii. p. 84 (1866); Monogr. Helic. Vivent. Vi. 
p. 196], from Tabasco, is according to the original specimen (Tab. V. fig. 11) very 
probably only the young state of this species. 
9. Streptostyla cylindracea. (Tab. V. fig. 13.) 
Achatina cylindracea, Pfr. P. Z.S. 1846, p. 31°; Monogr. Helic. Vivent. ii. p. 269°; Reeve, Conch. 
Icon. vi., Achatina, t. 18. fig. 91°. 
Spiraxis cylindracea (Pfr.), Shuttl. in Bern Mittheil. 1852, p. 206 (Diagn. no. 2, p. 26) *; Pfr. 
Monogr. Helic. Vivent. iii. p. 475°. 
Streptostyla cylindracea (Pfr.), Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 30°; Angas, 
P. Z. 8. 1879, p. 482”. 
Spiraxis shuttleworthii (Pfr.), Tristr. P. Z. S. 1861, p. 230°. 
Hab. E. Muxico: Cordova (Jacot-Guillarmod * ®). 
N. Guatemata (Salvin §). 
?S.E. Costa Rica (Gabb*). 
Ceytrat America: Tortilla (ubi?: coll. Cuming 1 ?*). 
The suture itself is whitish and below it a fine white spiral line is to be seen, which 
is not impressed, and appears on closer examination to be produced by an internal 
thickening of the shell in the uppermost part of the lumen within each whorl. 
The specimen marked “ Spiraxis cylindracea” in Pfeiffer’s collection, now in the 
possession of H. Dorhn in Stettin (fig. 13), exceeds remarkably the dimensions given in 
