OMPHALINA.—HYALINIA. 113 
11. Omphalina sculpta, sp. ». (Tab. VI. figg. 10, 10a, 3.) 
Testa subdepressa, anguste umbilicata, argute striatula et passim impressionibus linearibus brevibus oblique 
descendentibus notata, lurido-flavida, nitida ; spira brevis, obtusa; sutura sat profunda; anfr. 43, con- 
vexi, sat celeriter crescentes, ultimus rotundatus, antice vix descendens; apertura perobliqua, truncato- 
ovata, peristomate recto, tenui, margine columellari ad insertionem triangulariter reflexo. 
Diam. maj. 10, min. 83, alt. 5; apert. diam. 54, alt. obliqua 4 millim. 
Hab. W. Mexico: Omilteme, in the State of Guerrero (H. H. Smith). 
In some specimens there are one or two longer spiral linear impressions on the lower 
side of the last whorl. 
c. Shell keeled, costulate above, smooth beneath. (Patutopsis, Strebel.) 
12. Omphalina carinata. 
Patulopsis carinatus, Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. p. 16, t. 4. figg. 15,15 a, b, 
t. 8. fig. 6 (anat.), t. 9. figg. 8 (radula), 20 (jaw) °. 
Hab. E. Mexico: Wood of Pacho near Jalapa and environs of Coatepec (Strebel ) ; 
Jalapa (Hoge). 
The shell of O. carinata looks somewhat as if it was not fully grown, on account of 
the small number of whorls and the comparatively large size of the first; but I do not 
know any Mexican species to which it can be referred. 
HYALINIA. 
Les Hyalines, Férussac, Tabl. Synopt. Anim. Moll., Prodr. p. 44 (1819). 
Zonites, Gray, in Lond. Med. Direct. xv. p. 286 (1821) (and of many subsequent French and 
British authors) (nec Montfort, 1810). 
Hyalinia (Agassiz), Charpentier, Nouv. Mém. Soc. Helv. i. p. 13 (1837). 
Hyalina, Gray, in Turton’s Man. of Land & Freshwater Shells, p. 168 (1840) ; Albers, in Malak. 
Blatt. iv. p. 91 (1857); v. Mart. in Albers’s Die Helic. ed. 2, p. 67 (nec Schumacher, 1817). 
Polita, Held, Isis, 1837, p. 915. 
Helicelia (Lamarck ?) (Risso, part.), Beck, Ind. Moll. p. 6 (1838). 
Oxychilus (part.), Discus (part.), and Vitrea (one sp.), Fitzinger, Syst. Verz. Weichth. 1833, 
pp. 99, &c. 
Vitrea (Fitzinger), E. Smith, Journ. of Conch. vi. pp. 337-339 (1891). 
Shell shining, smooth, depressed, mostly umbilicated, with simple peristome. No 
mucous-pore at the end of the foot. Jaw smooth, with median projection. Marginal 
teeth aculeate. 
We include in this genus the Mexican and Central-American species of moderate or 
small size with shining surface of the shell, which resemble the European Hyalini@ so 
much as to suggest the probability that the internal structure may be similar. 
BIOL. CENTR.-AMER., Terr. and Fluviat. Mollusca, February 1892. 15 
