224 MOLLUSCA. 
Composite ; the botanical name of this plant he could not ascertain. Palpalo is the 
name of a river in the district of Misantla. 
This species has been greatly misunderstood and confounded with others, no doubt 
on account of its great variation in colour and its peristome being so slightly expanded ; 
in an artificial system it might quite as well be placed among the species with simple 
and straight as among those with expanded peristome. From the original description, 
together with the locality indicated, I have no doubt that Say’s Bulimus emeus! 
is identical with Strebel’s Bulimulus palpaloensis4, For Bulimus meaxicanus of 
Lamarck, see below (p. 251) among the pseudo-Mexican species. 
As regards Philippi’s B. membranaceus, I have not seen a typical specimen; but 
his description and figure 14, compared with the example from Mirador 17, lead me 
to presume that it may belong to the unicolorous variety of O. emeus (=palpa- 
loensis). The shell figured by Reeve as B. membranaceus (Conch. Icon. v., Bulimus, 
t. 75. fig. 544) is not Philippi’s type; it is probably similar to the Venezuelan 
specimens referred by me to O. membranaceus in the paper quoted above!", and 
which may now be separated as a distinct species under the name of Otostomus 
venezuelensis. 
35. Otostomus irazuensis. (Tab. XIV. figg. 12, 12a, 13, 184, varr.) 
Bulimus irazuensis, Angas, P. Z. 8. 1878, p. 78, t. 5. figg. 17-207. 
Bulimulus trazuensis, Binney, Ann. N. York Acad. i. p. 262, t. 11. fig. L (radula, jaw) (1879) °. 
Otostomus (?) irazuensis, v. Mart. Conch. Mittheil. ii. p. 193°. 
a: strigis fuscis, plus minusve numerosis, subfulguratis. 
(Angas, loc. cit. figg. 18, 20.) 
6: pallide fuscescens, albido-aspersus (et guttulis nonnullis fuscis). (Figg. 13, 13 a.) 
(Angas, loc. cit. fig. 17.) 
e: fasciis 3 fuscis, latiusculis, albo-guttulatis. (Figg. 12, 12 a.) 
Hab. Centran Costa Rica: Volcan de Irazu, cn low aromatic bushes on the eastern 
slope (Boucard +); Tierra Blanca, on the southern slope of the Volcan de Trazu, 
at an elevation of 1800 metres above the sea (Biolley). 
Costa Rica, without nearer indication of locality (van Patten). 
The varieties a and 6 have been procured in company, together with specimens 
approaching to ¢ (Angas }, fig. 18), both by Boucard and Biolley, on the slopes of the 
Volcan de Irazu. Of var. ¢ I know of only one specimen, here figured, found 
among those collected by Van Patten: in one of his examples the peristome is slightly . 
expanded. 
This species agrees with O. tripictus in having a rose-coloured, simple peristome, but 
differs from it in the more elongate form and the rougher sculpture of the shell, also 
in the style of painting. 
