20 MOLLUSCA. 
Hab. Honpuras (Dyson 1?34°), 
Remarkable for its slender turreted form and neat coloration variegated with white 
and dark reddish-brown. 
Doubtful Species of Cyclostomide. 
Chondropoma truncatum. 
Cyclostoma truncatum (Wiegm.), Rossm. Icon. vi. p. 49, t. 28. fig. 397 (1839) *; v. Mart. in Malak. 
Blatt. xiii. p. 5 (1865) *. 
Chondropoma truncatum, Pfr. Monogr. Pneum. Vivent. i. p. 293°; Gray, Cat. Phaneropn. p. 208 *. 
Hab. Mexico 1? 34 (Deppe). 
The original specimen is lost. The author’s description and figure agree rather well 
with Chondropoma turritum, Pfr.; but this has hitherto only been known from 
Honduras, and Deppe did not collect in that country, but in Mexico. 
Tudora planospira. 
Cyclostoma (Tudora) planospira, Pfr. in Malak. Blatt. 11. p. 208 (1856) °. 
Tudora planospira, Pfr. Monogr. Pneum. Vivent. ii. p. 127”. 
Hab. ‘‘In republica Mexicana, teste Poey.” 
No other species of Tudora is known from the American continent. No figure 
is given. 
DIPLOMMATINA. 
Diplommatina, Benson, Ann. & Mag. Nat. Hist. iv. (2), p. 193 (1849). 
Shell ovate, thin, with vertical riblets; whorls somewhat irregular, the one before 
the last the largest; aperture vertical, circular; peristome double, expanded. Oper- 
culum thin, shelly, paucispiral. ‘Tentacles long, filiform ; eyes bilobated, sessile at the 
hinder part of the base of the tentacles. 
1. Diplommatina stolli, sp.n. (Tab. I. figg. 19 a, b.) 
‘Kine winzige Art, welche einen sonst blos aus Ostindien bekannten linksgewundenen starkgerippten Typus 
darstellt.”—O. Stoll, Guatemala, Reisen und Schilderungen aus den jahren 1878-1883, p- 199 (1886). 
Testa sinistrorsa, imperforata, ovato-conica, costulis in anfr. penultimo 16 sat validis, albida; anfr. 6, convexi, 
priores duo leves, flavescentes, penultimus maximus, ultimus paullo angustior, rotundatus, leviusculus ; 
apertura subverticalis, circularis, peristomate continuo, incrassato, expanso, albo. 
Long. 23, diam. 1, apert. $ millim. 
