SUBULINA, WEST AFRICA. 77 



columellar truncation is strong but subvertical, and aperture 

 quite oblique. This form may be readily separated from the 

 S. angustior with which it seems usually to occur, by its more 

 regular sculpture. Like S. angustior, it is oviparous, the 

 eggs noticeably flattened or oblate. 



Var. striata (Lea). PI. 11, fig. 97. 



A set of specimens labelled Liberia consists of paler shells, 

 greenish-corneous, sufficiently transparent to show the eggs 

 plainly through. They are a little wider, length 16, diam. 

 4, aperture 3.7 mm., with 9% whorls. The original descrip- 

 tion follows. 



"Shell somewhat cylindrical, horn-color, thin, longitudin- 

 ally and beautifully striate; sutures impressed; whorls 8, 

 rather convex. Aperture small, elliptical; columella in- 

 curved. This is a beautiful little species, rather larger than 

 the folliculus Lam. In form it resembles Bulimus octoneus 

 Rang (Achatina), but is not quite so large. Its minute and 

 close ribs distinguish it at once, as the octoneus is perfectly 

 smooth. The aperture is about one-fourth the length of the 

 shell, and the strise do not extend below the middle part of 

 the lower whorl. Length .38, diarn. .12 inch. [9.5 x 3 mm.] 

 Liberia, Dr. Blanding." (Lea). 



Achatina striata LEA, Proc. Anier. Philos. Soc. ii, 1841, p. 

 31 ; Observations iv, p. 3. 



Dr.W.H. Ball, who kindly compared the types with specimens 

 of striatella, writes as follows: "I have carefully compared 

 the specimens sent by you with Lea's types of striata, and 

 with specimens named striatella Rang received from various 

 sources. Your shells to my eye are exactly what we have 

 under the name of striatella. Lea's shells are so close to this 

 that I do not think a figure could be made which would 

 enable any one to discriminate them by form or sculpture. 

 There are however the following differences: Lea's shells are 

 all pale greenish-yelloiv like S. octona ; yours and all our 

 striatella are of a ferruginous brown. Specimens can be 

 picked out showing identical sculpture and form, but on 

 the whole there is more of a tendency of the sculpture in 



