HOLOSPIRA. 283 ° 
Subgen. Eprrosia, Strebel. 
Cylindrella, subgen. Holospira (part.), v. Martens, in Albers’s Die Heliceen, ed. 2, pp. 39, 40 (1860). 
Cylindrelia, sect. 1, species integre, and sect. 2, species subtruncate, Fischer & Crosse, Miss. Scient. 
Mex., Mollusca, i. pp. 318, 401, 404, 413. 
Epirobia, Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. p. 84 (1880) (mainland species only). 
Shell slenderly turrite, with 17-24 whorls, the first two swollen, smooth, forming a fine papillary tip, 
sometimes lost in the adult shell, the following whorls gradually increasing in diameter, almost always 
preserved in the adult shell, convex, with rather deep suture, and perpendicularly costulated or striated ; 
columellar axis narrowly hollowed, with longitudinal, elevated, opaque white strie (Strebel, loc. cit. t. 14. 
figg. 14, 15, 18); last whorl more or less produced near the aperture, which is round or transversely 
pear-shaped, the pointed end outwards, and provided with a thick somewhat reflexed peristome. Size 
small, 10-18 millim. in length and 2-3 millim. in diameter. Colour generally dull grey; seldom 
bi-coloured. Median tooth of the radula large and very blunt, without lateral points; first lateral 
tooth equal in size to the median, but asymmetrical, with a small outer point; the following teeth 
decreasing in size, but with the outer point becoming gradually stronger (Strebel, loc. cz t. 13. figg. 1, 
2, 4, 5). 
Geographical distribution extending from Eastern Mexico to Guatemala, also in 
Venezuela, but not yet known from Costa Rica or Panama or from the West- 
Indian Islands. 
The Mexican and Guatemalan species left by Fischer and Crosse in the large genus 
Oylindrella, after the separation of Eucalodium, Celocentrum, and Holospira, form a 
peculiar group, distinct from the insular forms chiefly in the preservation of all, or 
nearly all, the whorls in the adult state. The said authors had no opportunity of 
examining the radula of any of them, but the researches of Strebel prove that it is 
much more like that of Holospira than that of the species of Cylindrelia proper. The 
columellar axis, too, is similar in form in Epirobia and Holospira. I therefore once 
more unite them into one systematic division. | 
14. Holospira gassiesi. 
Cylindrella gassiesi, Pfr. Journ. de Conch. xv. p. 438 (1867) *; Monogr. Helic. Vivent. vi. p. 376° ; 
Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 410, t. 17. figg. 17, 17 a, 6 *, 
Hab. S.E. Mexico: Chiapas (Lland *~*). 
15. Holospira apiostoma. 
Cylindrella apiostoma, Pfr. P. Z.S. 1856, p. 322, t. 35. figg. 2,37; in Martini & Chemnitz, Syst. 
Conch.-Cab. ed. 2, Cylindrella, p. 32, t. 8. figg. 83-5°; Monogr. Helic. Vivent. iv. p. 703° ; 
Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 406, t. 17. figg. 15,15 a,b*; Sowerby, 
in Reeve’s Conch. Icon. xx., Cylindrella, t. 15. fig. 129 >. Strebel, Beitr. Mex. Land- und 
Siissw.-Conch. iv. p. 88, t. 5. fig. 6, t. 13. fig. 11 (genitalia) °. 
Hab. ¥. Mexico: Cordova (Sallé1~*) ; Cordova, at the entrance of the cave of Cacahuatl 
(Hoge). 
Columellar axis beset with fine spinules. 
36* 
