138 UROCOPTIS OP JAMAICA. 



Length 23, diam. 8.3 mm. ; whorls 7y 2 . Hills behind Blue- 

 fields. 



Length 31, diam. 9.6 mm. ; whorls 9. Mulgrave. 



Length 26.5, diam. 8.5 mm. ; whorls 8. Mulgrave. 



Length 21, diam. 7 mm. ; whorls 7%. 



Jamaica: From the cockpit country in S.-W. Trelawny to 

 the coast in eastern Westmoreland. Chiefly west of the area 

 occupied by the rose-colored forms, and east of that of U. 

 zonata. Map no. 2, area 11. 



Turbo cylindrus CHEMNITZ, Conchyl. Cab., xi, p. 279, pi. 

 209, f. 2061, 2062 (1795). DILLWYN, Descript. Catal., ii, p. 

 862 (1817). Helix cylindrus WOOD, Index Testae., pi. 32, f. 

 113 a (copy from Chemn.). Pupa cylindra GRAY, Ann. of 

 Philos. (N. ser.), ix, p. 413. Pupa cylindrus DESK, in Lam., 

 An. s. Vert, viii, p. 194 (1838), and in Fer., Histoire, ii, p. 

 224, pi. 164, f. 1, 2, 3. Cylindrella cylindrus Chemn., PFR., 

 Symbolae, ii, p. 136 ; in Phil., Abbild., i, p. 185, pi. 1, f . 2, and 

 ii, p. 49, pi. 2, f. 11 (middle figure); Monogr., ii, p. 370; 

 Conch. Cab., p. 6, pi. 1, f. 15-17. GLOYNE, Journ. de Conchyl., 

 xx, p. 35. IPupa purpurea auct. angl., GRAY, Annals of 

 Nat. Hist., v, p. 244, name only (1840). ICylindrella pro- 

 cera Ad., SOWERBY, Conch. Icon., xx, pi. 2, f. 14 (1872). 



This royal species is the first-described member of the group 

 of large forms distributed throughout the interior of the 

 western half of Jamaica. It differs from the large roseate 

 forms chiefly in the stronger basal keel and the color, which, 

 though subject to wide variation, is always more or less purple. 

 The shell, moreover, is ordinarily much thinner, easily broken 

 through with the point of a pen-knife, while the roseate forms 

 are much stronger. 



The figures and description of Deshayes first put the spe- 

 cies upon a scientific basis. Figs. 6, 7 illustrate the typical 

 form, the specimens being from Mulgrave, in N.-W. St. Eliz- 

 abeth (Henderson). Figs. 8, 9 are a slightly more slender 

 form from the hills behind Bluefields, on the south coast of 

 Westmoreland. Shells from Withorn (Henderson coll.) are 

 similar in shape, but of a finer purple color. 



Sowerby's figures of cylindrus (C. Icon., xx, pi. 2, f. 9 a, 

 9 &) are probably U. ambigua magna. 



