288 SPIROSTEMMA. 



Length 17, diam. 2.8 mm. ; whorls 



engt , am. 2.8 mm.; whorls 12% 

 Length 15.3, diam. 2.7 mm. ; whorls 10% j ( 

 Jamaica: Interior of the parishes of St. Catherine at Bog- 

 walk (Johnson and Fox, Henderson), and Watermount (Jar- 

 vis) ; Clarendon, at Teak Pen (Jarvis) ; St. Elizabeth at 

 Stanmore (Jarvis). 



Cyl dunkeri PFR. in Philippi, Abbild., ii, p. 51, pi. 2, f. 9 

 (Oct. 1845). C. dunkeriana PFR., Monogr., ii, p. 383; iii, 

 580; iv, 711; vi, 359. SOWERBY, Conch. Icon., xx, species no. 

 69, pi. 8, f. 79. JOHNSON & Fox, Nautilus v, p. 34. GLOYNE 

 J. de Conch., 1875, p. 122 (St. Anne). C. rubra C.B.Ad., 

 HENDERSON, Nautilus viii, p. 19, no. 96 (Bogwalk). 



This species differs from U. princeps by its straighter axis 

 and less projecting basal keel, and by the scarcely produced 

 last whorl, which in princeps is built forward, carrying the 

 aperture free of the preceding whorl. 



Figures 64, 65 are copies of the original figures in Philippi 's 

 Ablildungen; 62, 63 are figures subsequently published by 

 Pfeiffer. Figures 67-71 represent specimens from Bogwalk. 



2. S. ALTA (Sowerby). PL 36, fig. 66. 



" Shell narrow, elongated, red, very slowly attenuated; 

 whorls raised smooth, very straight, the last rather convex, 

 keeled below, excavated under the keel ; aperture perpendic- 

 ularly ovate. A narrow shell with straighter whorls than 

 C. carinata, with the keel on the last whorl less prominent. " 



Cyl. cylindrus Chemnitz, SOWERBY, Conch. Icon., xx, pi. 8, 

 f. 68 (1875) =C. alt a SOWERBY, Index to Monogr. of Cylin- 

 drella. 



The synonymy given by Mr. Sowerby betrays some lack of 

 that punctilious regard for accuracy which should character- 

 ize the monographer. The figure reminds me of the Bogwalk 

 form of S. dunkeri. 



3. S. BELLEVUENSIS Pilsbry, n.n. PI. 34a, figs. 7, 8. 



" Shell rim ate, cylindrical, nearly white, under a light 

 brown epidermis, which becomes paler towards the apex; the 

 spire widens very gently from the base of the penult, whorl 



