GLANDINA. 65 
18. Glandina turris. 
Achatina (Glandina) turris, Pfr. Symb. Hist. Helic. iii. p. 91 (1846) '. 
Achatina turris, Pfr. Monogr. Helic. Vivent. ii. p. 288°; Reeve, Conch. Icon. vi., Achatina, t. 13. 
fig. 45°; Carpenter, Cat. Mazatlan Shells, p. 175‘; Tryon, in Am. Journ. Conch. ii. p. 227, 
t. 16. fig. 8°; Binney, Land and Freshw. Shells of N. Am. i. p. 19 (1869) °. 
? Glandina turris, Strebel, Beitr. Mex. Land- und Siissw.-Conch. iii. p. 46, t. 12. fig. 4’. 
Hab. N.W. Mexico: Mazatlan‘? ; Presidio de Mazatlan (W. Richardson). 
The aperture is comparatively broader below than in most other species of Glandina. 
I have seen no specimen so large as Pfeiffer’s typical one (48 millim.), which is probably 
also that figured by Reeve. Mr. Richardson’s example is only 38 millim. long, but it 
so closely resembles Reeve’s figures in its general features that I have no doubt about 
its identity with G. turris, Pfr. Also the measurements given by Carpenter are not so 
large, long. 1°2 inch=55 millim. 
Concerning the specimen in the Berlin Museum, described and figured by Strebel’, 
locality unknown, I am rather doubtful whether it may not be an elongated variety 
of G. albersi. 
19. Glandina mazatlanica, sp. n. (Tab. IV. figg. 2, 2a, 3.) 
Glandina turris, collect. 
Testa subcylindrica, solidula, confertim costulato-striata, corneo-fusca; anfr. 64, convexiusculi, apice obtuso, 
sutura subangulata, leviter marginata, vix crenulata; apertura dimidiam longitudinem fere attingens, 
lanceolata, margine externo arcuatim producto; columella subrecta, abrupte truncata. 
Long. 30-82, diam. 114-13; apert. long. 15-16, lat. 6-63 millim. 
Var. abbreviata. (Fig. 3.) 
Spira abbreviata, anfractu penultimo turgido. Long. 30, diam. 12, apert. 15 millim. 
Hab. N.W. Mexico: Mazatlan (Forrer; mus. Berol. no. 35386); Tres Marias Is. 
(Forrer) ;—var., also Tres Marias Is. (Forrer). 
This species is somewhat intermediate between G. pseudoturris and G. albersi; the 
colour and the suture is as in the former, but the form is less elongated. 
G. turris of Strebel, Beitr. Mex. Land- und Siissw.-Conch. ii. p- 47, & i. t. 9. 
fig. 11, locality unknown, is similar, but somewhat larger and with the aperture pro- 
portionately much shorter. . 
20. Glandina pseudoturris. (Tab. IV. figg. 4, 4a.) 
Achatina turris, Deshayes, in Férussac’s Hist. Nat. Moll. Terr. ii. p. 186, t. 134. figg. 1, 2’. 
Glandina pseudo-turris, Strebel, Beitr. Mex. Land- und Siissw.-Conch. ii. p. 47, t. 6 a. figg. 41, 41a, 0. 
Oleacina (Giandina) pseudoturris (Streb.), Pfr. Monogr. Helic. Vivent. viii. p. 329°. 
Hab. S.W. & S. Mexico: Tierra Colorada, State of Guerrero (Z/.. H. Smith); Juquila, 
State of Oaxaca ** (mus. Berol.; Strebel). 
BIOL. CENTR.-AMER., ‘l'err. and Fluviat. Mollusca, Apri/ 1891. 9 
