126 MOLLUSCA. 
Hab. E. Mexico: environs of Vera Cruz (Berendt and Strebel 1-*). 
W. Guaremata: district of Cholhuitz, in the Costa Cuca, Pacific slope, on the 
ground, in the woods (Stol/). 
Cenrrat Costa Rica: Tierra Blanca, on the southern slope of the Volcan de Irazu 
(Biolley). 
3. Pseudohyalina cidariscus, sp. n. (Tab. VII. figg. 1, 1 a-d.) 
Testa perspective umbilicata, subdepressa, costulis sat confertis, paullum obliquis sculpta, albida; spira pro- 
minula, subgradata; anfr. 4, valde convexi, ultimus rotundatus, basi convexus ; apertura lunato-rotundata, 
peristomate simplice, margine basali valde arcuato. 
Diam. maj. 24, alt. 2, apert. 1 millim. 
Hab. 8.E. Mexico: Palenque, in the forest (coll. Morelet). 
Near the preceding (P. elegantula), but with the upper whorls very distinctly 
elevated above the last one, the sculpture rather more strong. 
B. Whorls 63, subangulated, rising one above the other. (Pycnoeyra, Strebel.) 
4, Pseudohyalina berendti. 
Helix berendti, Pfr. in Malak. Blatt. viii. p. 72, t. 1. figg. 9-12 (1861)?; Monogr. Helic. Vivent. 
v. p. 155%. 
Helix (Microphysa) berendti, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 226, t. 10. figg. 6, 
6a, 6°. 
Pycnogyra berendti (Pfr.), Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. p. 20, t. 4. fig. 5 
(shell), t. 9. fig. 12 (radula) *. 
Hab, E. Mexico: environs of Jalapa; Hacienda de Mirador (Sartorius, Berendt, and 
Strebel !—4) ; Coatepec, Consolapa, and Dos Arroyos (£. Salas *). 
Fam, AULACOGNATHA. 
Jaw more or less distinctly ribbed, its cutting-edge crenulated. All the teeth of 
the radula rather subquadrate ; no spiniform marginals. Shell generally more solid, 
sculptured and coloured, of very various form. 
PATULA. 
Patula, Held, Isis, 1837, p. 915. 
Euryomphala, Beck, Ind. Moll. p. 8 (1838). 
The normal forms of this genus are characterized by a sculptured, opaque (not glossy) 
shell, a wide umbilicus, and a thin-edged aperture. The jaw has many, not very 
prominent, ribs; the teeth of the radula are all subquadrate; no spiniform laterals. 
No dart-sac; no vesicule multifide ; no flagellum. 
Geographical distribution nearly cosmopolitan, but chiefly in temperate climates. 
