HYALINIA. 115 
A. Species of the usual form and sculpture. (HyYAtInta, sensu str.) 
1. Hyalinia nitidopsis. (Tab. VI. figg. 9, 9 a-c.) 
Helix nitidopsis, Morelet, Test. Noviss. ii. p. 8 (1851)*; Pfr. Monogr. Helic. Vivent. iii. p. 68°. 
Zonites (Hyalinia) nitidopsis, Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 173°. 
Hab. Cuyrrau Guatemana: Salama, very rare (Morelet 1-3). 
I give here a figure of this species, from a specimen lent me by A. Morelet. On 
microscopical examination, under a magnifying-power of £°, a very faint, close, spiral 
striation is visible on the surface, no trace of which is to be seen under an ordinary 
lens. 
2. Hyalinia glomerula, sp.n. (Tab. VI. figg. 14, 14 a-d.) 
Testa anguste umbilicata, subdepresse globulosa, levissime striatula, nitida, albida, diaphana ; anfr. 4, tumidi, 
sutura profunda discreti, ultimus supra et infra subequaliter convexus, antice modice deflexus; apertura 
paullum obliqua, lunato-subcircularis, marginibus ad insertionem inter se remotis, columellari arcuato, 
latiusculo. 
Diam. maj. 5, min. 43, alt. 3; apert. diam. 2, alt. obliqua 2 millim. 
Hab. N. GuatemaLa: San Luis, Peten (coll. Morelet). 
Somewhat like the preceding, but distinct by its more globular form, deeper sutures, 
different colour, and smaller size. Even under a magnifying-power of §°, no trace of 
spiral strize can be perceived. 
3. Hyalinia hoffmanni, sp. n. (Tab. VI. figg. 11, 11 ac.) 
Testa late umbilicata, conoideo-depressa, striatula, nitidula, pallide virescens, concolor ; anfr. 44, convexiusculi, 
sutura sat profunda, ultimus rotundatus, antice non deflexus, infra excavatus, sensim in umbilieum fere 4 
diametri equantem transiens; apertura paullum obliqua, emarginato-subcircularis, marginibus remotis, 
columellari distincte ascendente. 
Diam. maj. 6, min. 53, alt. 33; apert. diam. 24, alt. obliqua vix 2 millim. 
Hab. Costa Rica: Quebrada Honda, on a stem of fern (C. Hoffmann, in mus. Berol.) ; 
San José, among moss on the trunks of trees and below dry leaves (H. Pittier) ; 
Hacienda El Roble, between the Volcanos Irazu and Turrialba (P. Biolley). 
Has the general appearance of H. nitida, Mill., but is distinct from it by the less 
swollen last whorl and the wider umbilicus. From /H. nitidopsis it differs also by the 
width of the umbilicus, as Morelet says that this is narrower in his species than in 
H. nitida. No spiral striz can be detected, even under a magnifying-power of 4°. 
H. tehuantepecensis of Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. p. 18, t. 4. 
fig. 4, from Pacho and Mirador, E. Mexico, probably belongs to the same species; it 
differs very considerably from the shell so named by Crosse and Fischer. 
15* 
