ACHATINA, WEST AFRICA. 9 



1. A. ACHATINA Linne. PL 31, fig. 1. 



Shell very large, acutely ovate, rather thin, yellow varie- 

 gated with red-brown longitudinal streaks often zigzag in 

 places, the upper whorls roseate or whitish. Sculpture of 

 fine, irregular foldlets along growth-lines, cut into long 

 granules by decussating spirals; this sculpture is stronger 

 and coarser below the suture, and becomes subobsolete below 

 the periphery. The spire is straightly conic, whorls about 

 8y 2 , slightly convex, the last whorl inflated. Aperture large, 

 bluish-white within. Columella concave, narrow, and with 

 the entire parietal wall of a deep rose color. Outer lip thin 

 and acute. Length 170, diam. 95, length of aperture 96 mm. 



West Africa: Freetown, Sierra Leone (U. S. exped.). 

 Liberia, not rare, the largest 200 mm. long (Dohrn). Akkra, 

 on the Gold Coast (Buchholz). 



Bulla achatina L., Syst. Nat. (10), p. 728; (12), p. 1186. 

 Cf. Hanley, Ipsa L. Conch., p. 210. GMEL., Syst. Nat. (13), 

 p. 3431. DILLWYN, Descr. Cat., i, p. 494. Buccinum acha- 

 tinum MULLER, Hist. Verm., ii, p. 140. Bulimus achatinus 

 BRUG., Encycl. Meth., i, p. 358. Helix achatina FEB., Hist., 

 pi. 131, f. 1-3; 131 A, f. 1-3; 131 B. Achatina variegata 

 LAMARCK, Syst. An. s. Vert, p. 91 (1801). ROISSY, in Buf- 

 fon, Hist. Nat. gen. et partic. des Mollusques, v, p. 354 

 (1805). REEVE, Conch. Icon., v, pi. 1, f. 3, pi. 5, f. 3&. 

 DESK, in Fer. Hist., p. 155. PFR., Monogr., ii, p. 249; iii, 

 482; iv, 600; vi, 211; Conchyl. Cab., p. 290. PHILIPPI, 

 Abbild., iii, p. 31, pi. 2, f. 4 (young shell). STEARNS, Proc. 

 U. S. Nat. Mus., xvi, 1893, p. 327, no. 47. DOHRN, Jahrb. 

 d. D. Malak. Ges., v, 1878, p. 155. VON MART., Monatsber. 

 K. P. Akad. Wissensch., 1876, p. 257. Achatina perdix LAM., 

 An. s. Vert., vi, p. 127 (1819). Achatina zebra BLAINV., 

 Malacology, p. 456, pi. 40, f. 1. Achatium elegans LINK, 

 Beschreib. Rostock Samml., p. 137 (1807), based upon 

 Chemnitz, Conch. Cab., ix, pi. 118, f. 1012, 1013. Ampulla 

 achatina, bombarda, flammea and lacteae BOLTEN, Mus. Bol- 

 tenianum, p. 110. Chersina tigrina africana HUMPHREY, 

 Mus. Calonnianum, p. 63. 



The largest species and type of the genus Achatina. The 



