BULIMUS §. 2. 15 



38. B. incomptus (Helix) Sowerby. 



T. imperforata, ovata, tenuiuscula, pailide fuscescens, casta- 

 neo-bifasciata et epidermide fuscidula tenui obducta ; spira conoi- 

 dea, obtusa; anfr. 5 convexiusculi, ultimus spira vix brevior; 

 columella rectiuscula, subdilatata, basi subtruncata , area casta- 

 nea circumdata; apertura late lunato-ovalis; perist. simplex, ex- 

 pansum, margine basali cum columella angulum obtusum formanto. 

 — Long. 29, diam. 18 mill. Ap. intus 14 mill. longa, 10 lafa. 

 (Mus. Cuming.) 



Helix incompta Sow. in Proc. Zool. Soc. 1840. p. 103. 



Bidimus incomptiis Pfr. Symb. IIL p. 85. 

 Habitat in insula Tablas Philippinarum (Cuming). 



39. B. concinnus (Helisc) Sowerby. 



T. imperforata, oblongo-pyramidata, tenuiuscula, pallide 

 fusca, epidermide alba hydrophana marmorata; spira pyramidata, 

 apice obtusa; anfr. 6 planiusculi, ultimus basi subangulatus, 

 "/s longitudinis subaequans; columella incrassata, alba, oblique 

 truncata; apertura subtrapezoidalis; perist. subincrassatum, mar- 

 gine dextro sinuoso. — R. a. = 16 : 21. — Long. 33, diam. 18 mill. 

 Ap. 13 mill. longa, 9 lata. (Coll. Nr. 27.) 



Helix concinna Sow. in Proc. Zooi. Soc. 1841. p. 20. 

 — — Deless. recueil t. 39. f. 2. 



Achatina concinna Pfr. Symb. II. p. .58. 



Bulimus concinnus Pfr. Symb. III. p. 53. 

 Ilabitat in insula Luzon (Cuming). 



40. B. Downesii Gray. 



T. imperforata, ovato-turrita , solida , longitudinaliter rugosa, 

 nitida, alba, strigis obliquis castaneis picta, apice rosea, basi 

 castanea; anfr. 8 planulati, ultimus % longitudinis subaequans, 

 basi obtuse angulatus ; columella acuta, subintorta; apertura lu- 

 nato-ovalis; perist. incrassatum, reflexiusculum, carneum, mar- 

 ginibus callo tenuissimo junctis, columellari tenuissimo, reflexo, 

 appresso. — Long. 62, diam. 27 mill. Ap. intus 23 mill. longa, 

 1i lata. (CoU. N. 28.) 



Bulinus Downesii Gray in Sow. Conch. 111. Bul. f. 99. 



Achatina Downesii Pfr. Symb. I. p. 46. 



— Leaiana Grat. Bord. XI. p. 416. t. 2. f. 7. 



Helix crenata Valenc. in Mus. Paris. 

 Habitat in insula Fernando Po Africae occidentalis (Gray). 



