HOLOSPIRA. 285 
17 millim.), the more convex and broader whorls (the visible part of the lower whorls 
23 times as broad as high, instead of 15-13 times, as in H. polygyra), and the distinctly 
transverse pear-shaped or triangular aperture. 
The columellar axis is longitudinally costate, the coste being partly divergent and 
partly forked above; the lower half within each whorl is not particularly swollen 
(see fig. 1). 
21. Holospira morini. 
Cylindrella morini, Morelet, Test. Noviss. i. p. 11 (1849); Pfr. Monogr. Helic. Vivent. iii. p. 5787; 
Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Cylindrella, p. 48, t. 5. figg. 24-26°; Fisch. 
& Crosse, Miss. Scient. Mex., Mollusca, i. p. 412, t. 17. figg. 12, 12a, b*; Sowerby, in 
Reeve’s Conch. Icon. xx., Cylindrella, t. 16. fig. 136 (somewhat magnified) °; Pilsbry, Proc. 
Acad. Phil. 1892, p. 338° 
Hab. S.E. Mexico: mountains of Poana, in the State of Tabasco (Rovirosa ®), 
N. GuatemaLa: Vera Paz, in rocky places in the forest (Morelet1-4); Cahabon 
(Sarg *). 
Var. pulchella. 
Cylindrella (Gongylostoma) pulchella, v. Mart. Sitzungsb. d. Ges. nat. Freunde Berlin, 1886, p. 161’. 
Of smaller size, 103 millim. only in length ; last whorl much produced, with strong keel; aperture 13 millim. 
long, 2 millim. broad. 
Haé. KE. Guatemata: Livingston, in the Bay of Honduras, on the lower surface of 
stones (O. Stoll‘). 
Var. salpinx. 
Cylindrella salpinz, Tristram, P. Z. 8. 1861, p. 231°; Pfr. Monogr. Helic. Vivent. vi. p. 391°; 
Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 415°. 
Hab. N. GuateMata: probably near Coban or Lanquin, in Vera Paz * (Salvin 8-19), 
I have examined the two typical specimens obtained by Mr. Salvin in Guatemala. 
One of these agrees very well with C. morini, only differing from it in having a pure 
white varix on the fifth and sixth whorls before the last, one just above the other, and 
a less distinct varix on the following whorl, immediately below the others ; its general 
colour is a dull ashy-grey. The second specimen is pure white, probably bleached. 
Var. sarg. 
Cylindrella morini, var. B, Fisch. & Crosse, loc. cit. pp. 412, 413”. 
Whitish, the aperture scarcely produced, nearly appressed to the penultimate whorl. 
Hab. N. Guatemata: Cahabon (Sarg 1). 
* The locality is incorrectly given as Duefias by Fischer and Crosse "°. 
