PSEUDOSUBULINA.—SPIRAXIS. . 305 
The first two whorls are smooth, the third and fourth comparatively large, sub- 
globose, and provided with strong, but narrow coste (fig. 20@); on the fifth whorl 
commence the broad and flat coste, with very narrow interstices, the sculpture being 
similar on all the following whorls. The whorls are very feebly convex, rather flat, 
chiefly the lower ones; the last whorl, seen from the dorsal side, is two-sevenths of 
the whole length of the shell. The aperture is small, the columellar margin very 
concavely arcuated. The two examples from Livingston, on the Atlantic coast, are of 
larger size than those described by Morelet, and Fischer and Crosse, viz. :— 
Specimens from Peten...... Whorls 9-10: length 12-13, diam. 3; apert. long. 23, diam. 1} millim. 
Specimens from Livingston .. am 114: ,, 15, 4, 34; ” 3, » 1d 5 
Nevertheless, the specimens from Livingston agree so well with Fischer and Crosse’s 
figure of Subulina lirifera that I do not think they can be separated, not even as a 
variety. The very concave shape of the columellar margin gives the species somewhat 
the facies of Tornazis. 
9. Pseudosubulina (?) salvini, sp.n. (Tab. XVII. figg. 21, 21 a, d.) 
Achatina trypanodes, Tristram, P. Z. 8S. 1863, p. 411 (mec Pfr.) *. 
Testa subulato-turrita, rimata, perpendiculariter confertim striatula, nitida, albida; anfr. 84, eonvexiusculi, 
sutura sat profunda, primus subglobosus, papilliformis, sat magnus, ceteri regulariter crescentes, ultimus 
basi celeriter angustatus ; apertura subperpendicularis, trapezoidea, margine externo subrectilineo, basali 
anguste rotundato, columellari obliquo, in medio protuberante, prope basin oblique subtruncato. 
Long. 10, diam. 24 ; apert. long. 13, diam. 13 millim. 
Last whorl, seen from the dorsal side, to the whole length as 1: 34. 
Hab. N. Guatemata: Vera Paz (Salvin '). 
A comparison of our figure of this shell, drawn from Salvin’s specimen, with fig. 16, 
taken from the type of P. trypanodes (Pfr.), will show the differences between these 
two forms. It is somewhat strange that this species should not be found amongst the 
numerous Guatemalan shells described by French authors, but I cannot identify it 
with any of those enumerated in Fischer and Crosse’s work; the nearest seems to be 
P. sargi, from which the present species may be known by the less convex whorls, the 
stronger sculpture, and the different form of the outline of the columellar margin. 
The last-mentioned character makes it even doubtful whether this shell belongs really 
to the genus Pseudosubulina. 
SPIRAXIS. 
Spiraxis, C. B. Adams, Contrib. Conch. no. 6, p. 87 (1850). 
Spiraxis, Sect. II. Bulimiformes, Shuttleworth, in Mittheil. nat. Ges. Bern, 1852, Diagn. neuer 
Moll. no. 2, p. 27; Pfeiffer, Monogr. Helic. Vivent. ii, p. 469. 
Spiraais, sect. Euspirazis, Pfeiffer, Zeitschr. f. Malak. 1855, p. 166 ; Albers, Die Helic. ed. 2, 
p. 34, 
- BIOL. CENTR.-AMER., Terr. and Fluviat. Mollusca, April 1898. 39 
