198 EUGLANDINA. 



" Rather near to G. simplex, but distinct by the nearly 

 straight columella. " Prof, von Martens' figure of the type is 

 reproduced. 



54. E. EXCAVATA (v. Martens). PL 23, figs. 42, 43. 



Shell subcylindric, closely striatulate, the striae lighter and 

 more irregular on the last whorl, spiral sculpture scarcely vis- 

 ible under the lens, rather glossy. Whorls 6, the first obese, 

 slightly convex, the penultimate and last nearly flat; apex 

 obtuse ; suture nearly simple, whitish or pale gray. Aperture 

 piriform-lanceolate, scarcely half the length of the shell, the 

 outer border nearly perpendicular, slightly arching forward ; 

 columella excavated-arcuate in the middle, laminiform below, 

 spirally twisted and transversely truncate. Length 31, diam. 

 11.5, aperture 16x6 mm. (Martens). 



Northwestern Mexico: Mazatlan( ?). 



Glandina albersi Pfr., W. G. BINNEY, Land- and Fresh- 

 water Shells of N. A., i, p. 18, fig. 9 (not the description). 

 Glandina excavata MARTS., Biologia, p. 67, pi. 4, f. 9, 9a. 



"I have three specimens before me two from Prof. W. 

 Bunker's collection marked G. turris, Mazatlan (fig. 9), and 

 one from Mr. Patel's collection labeled G. albersi, Peru; the 

 real habitat of G. excavata is therefore quite uncertain. 

 Nevertheless, I do not like to omit this species, as it is very 

 similar in its general form to G. pseudoturris, but quite dis- 

 tinct by the columella and also by color. 



"The figure given by Binney represents G. excavata rather 

 well, both in the general shape and in the peculiar conforma- 

 tion of the columella. It is said to have been drawn from 

 an authentic specimen of G. albersi in Cuming's collection; 

 but it does not agree with the original description by Pfeiffer, 

 who says 'testa ovato oblonga' and 'columella substricte de- 

 scendens, ' or even with that of Binney, which is a translation 

 of that given by Pfeiffer" (Martens). 



55. E. CYLINDRACEA (Phillips). Vol. I, p. 41. 



Glandina (Achatina) cylindracea PHILLIPS, Proc. Acad. N. 

 S. Phila. 1846, p. 67, pi. 1, fig. 33 (issued 'between July 1st 



