62 ACHATINA, EAST AFRICA. 



apex a little obtuse. Whorls iy 2t the median ones some- 

 what decussated with spiral lines, submarginate and deeply 

 striate at the sutures, the last whorl a little longer than 

 the spire, smoothish, with a gummy gloss. Columella pli- 

 cate-twisted, abruptly truncate basally. Aperture oblique, 

 nearly oval, lilac within, pearly; peristome simple, brown- 

 edged, the basal margin arcuate. Length 98, diam. 45, 

 aperture 55x28 mm. (Pfr.). 



East Africa: Zomba (Johnston) ; Tette, Mozambique 

 (Peters). 



A. glutinosa PFR., P. Z. S., 1852, p. 86; Monogr., iii, p. 

 485; Conchyl. Cab., p. 360, pi. 44, f. 1. E. A. SMITH, 

 Proc. Zool. Soc. Lond., 1899, p. 589 (including petersi 

 Mart). A. petersi MARTENS, Malak. BL, vi, 1859, p. 214. 

 PFR., Monogr., vi, 213; Novit. Conch., iii, p. 452, pi. 99, f. 

 13-15. 



A thin, dark colored, glossy species, with spaced spiral 

 sulci on the last whorl. Fig. 23 is a copy of one of Pfeif- 

 fer's figures of A. glutinosa, fig. 24 of A. petersi. Neither 

 of these figures sufficiently represent the spiral grooves on 

 the last whorl. 



Mr. E. A. Smith writes as follows: "I am unable to find 

 any distinguishing characters between this species, said to 

 have been originally obtained in West Africa, and A. petersi 

 from Mozambique ; and I am of the opinion that the locality 

 'W. Africa' is one of the many errors of this kind occur- 

 ring in Mr. Cuming's collection. The species is remarkably 

 constant in coloration, but varies somewhat in ventricosity. 

 The type is 97 millim. in length and 49 in diameter, whereas 

 a more ventricose specimen is the same length but 6 millim. 

 broader, a smaller but adult example from Zomba (88 millim. 

 long and 45 wide) is rather more solid than the typical 

 form." 



The wider form, petersi Mart. (pi. 9, fig. 24), was de- 

 scribed as follows: Shell ovate-conic, thin, perpendicularly 

 lightly wrinkled and traversed by a few spiral impressed 

 lines ; nearly uniform fulvous-brown with chestnut variceal 

 streaks, and with a varnish-like gloss. Spire conic, atten- 



