202 MOLLUSCA. 
4) 
f. ictericus: gracilior, unicolor flavidus, columella sola violacea. (Fig. 5.) 
Hab. W. Guatemata: Cerro Zunil (Champion). 
According to the MS. notes of Dr. O. Stoll, this species, and especially the var. wni- 
color, is characteristic of the forests of the western or Pacific slope of the Guatemalan 
Cordillera, at an elevation of between 3000 and 4000 feet above the sea, descending in 
some localities nearly to 2000 feet. The specimen collected by Mr. Champion at El 
Reposo in the lowlands between Retalhuleu and the Pacific coast is remarkably small, 
attaining only 364 millim. in length; it exhibits, nevertheless, the remains of an older 
expanded aperture (such as is often to be seen in 0. dombeyanus) at the back of the 
last whorl, which corresponds to a length of 30 millim. This early building of an 
aperture, as if it were adult, seems to indicate a longer interruption or slowness of 
growth, caused by unfavourable conditions of the locality. 
The var. d, which I know only from the description and figure of Fischer and Crosse "', 
closely resembles, at first sight, O. chiapensis. 
Jaw and radula of var. jansoni examined by myself. 
4, Otostomus zhorquinensis. 
Bulimus zhorquinensis, Angas, P. Z. 8. 1879, p. 478, t. 40. fig. 4°. 
Hab. S.E. Costa Rica: Middle Zhorquin to Cuabre, on low hills and flat ground (@adé '). 
Angas compares this species with Bulimus expansus, Pfr., B. pallidior, Sow., 
B. excelsus, A. Gould, and B. lilacinus, Reeve. I have not seen a specimen 
of it. 
5. Otostomus josephus. (Tab. XII. figg. 7-10.) 
Bulimus josephus, Angas, P. Z. 8. 1878, p. 73, t. 5. figg. 18, 14’, 1879, p. 478”. 
Hab. Centrat Costa Rica: San José, on the trunks of Acacia trees (Boucard ') ; 
Talamanca, on the lower hills (Gadd 2). 
b. maculosus: maculis fuscis subquadratis 4-seriatis. (Fig. 7.) 
Hab. S.W. Costa Rica: on the banks of Rio Pacuare del Sur in its middle course, about 
500 metres above the sea (Pittzer). 
c. concolor: pallide flavescens. (Figg. 8-10.) 
Hab. N.E. Costa Rica: Puerto Viejo, on the Rio Sarapiqui (Biolley). 
S.W. Costa Rica: valley of the Upper Savegal, at an elevation of 1000 metres 
above the sea, and in the woods near Terraba; Quebrada de Tocori in the valley 
of the Rio Paqueta, and El Pital in the valley of the Rio Naranjo (Pittier). 
This species is remarkable for the broadly expanded columellar margin, which 
ascends perpendicularly and forms a distinct angle with the convexity of the penulti- 
