118 MOLLUSCA. 
9. Hyalinia paucilirata. (Tab. VI. figg. 12, 12 a-c.) 
Helix paucilirata, Morelet, Test. Noviss. ii. p. 8 (1851) *; Pfr. Monogr. Helic. Vivent. iii. p. 94”, 
Zonites (Hyalinia) pauciliratus, Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 178°. 
Hab. Cextrat GuatemaLa: Salama, not frequent (Morelet 1°). 
The chief peculiarity of H. paucilirata is the “ lineolis remotis irradiantibus utrinque 
lirata.” These are, according to the original specimen kindly lent me by the author, 
impressed radiating lines or indentations, as if cut into the surface of the shell—such 
as are to be found also in the North-American J. indentata, Say, and in H. insecta, 
v. Mart., from Puerto Rico, but somewhat numerous; in the last whorl about thirty 
are present, ten of which are within the last 2 millim. of the aperture, the rest some- 
what more apart one from the other. 
Three species only of this subdivision are known to me, all from North or Central 
America. 
c. Whorls rapidly increasing in size, the last proportionately very large, not descending 
at the aperture ; spire flat or immersed. (AMMoNocERAS, Pfr.) 
10. Hyalinia stolli, sp.n. (Tab. VI. figg. 15, 15 a-—c.) 
Testa latissime umbilicata, depressa, nitida, vix striatula, albido-hyalina, strigis radiantibus albis compluribus ; 
anfr. 33, celeriter crescentes, spira paullum immersa, sutura profunda, ultimus rotundatus ; apertura sat 
obliqua, dilatata, margine supero valde arcuato. 
(2) Diam. maj. 23, min. 2 , alt. 1; apert. diam. 1 , alt. obliqua 1 millim. 
(0) ” 3 oe 23 ” 9 13 9 1 millim, 
Hab. W. Guatemata: Retalhuleu (0. Stol/).—Dimensions a. 
Costa Rica: San José, at 1135 metres above the sea, among moss (P. Biolley).— 
Dimensions 6. 
No spiral strie are to be seen, even under a magnifying-power of £2. 
The representatives of this subdivision are confined to Central and South America; 
some species of much larger size are found in Colombia (1. flora, Pfr.) and Brazil 
(H. euspira, Pfr.). 
GUPPYA. 
Stenopus, Lansdown Guilding, Zool. Journ. iii. p. 527 (1828) (nec Latreille, 1825, Crustacea). 
Guppya, Morch, in Journ. de Conch. xv. p. 256 (1867) ; Tate, in Amer. Journ. of Conch. v. p. 154 
(1870). : 
Habroconus, Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. pp. 154, 171 (1878); Strebel, Beitr. 
Mex. Land- und Siissw.-Conch. iv. p. 28 (1880). 
Shells of small size, shining surface, and trochoid shape, with simple aperture and 
very small or no perforation. Foot with a distinct mucous-pore at the hinder end and 
a longitudinally tripartite sole. Marginal teeth of the radula bicuspid. 
