200 MOLLUSCA. 
It is a curious fact that previous to the year 1882 no exact locality was known for this 
very remarkable shell, the largest of the Mexican species of this genus. It seems that 
in the Paris Museum it has been mixed with shells collected by Mr. Dombey in Peru or 
rather Chili: see Lamarck, Hist. Nat. des Anim. sans Vert. ed. 1, vi. p. 141, Auricula 
(Chilina) dombeyana, and ibid. p. 76, Helix peruviana, identical with laxata, Fér., which 
both inhabit Chili and not Peru; hence the name “ dombeyanus,” and the erroneous 
indication of Peru as habitat!245, Bernardi’s assertion 1° that his specimen came 
from the Solomon Islands is still less trustworthy. 
The name alcantare was given in honour of the then Prince-Royal of Portugal, Dom 
Pedro de Alcantara, afterwards king (1861). 
Radula examined by myself. 
2. Otostomus fenestratus. (Tab. XII. figg. 1, 1a, d.) 
Bulimus fenestratus, Pfr. P. Z.S. 1846, p. 29*; Monogr. Helic. Vivent. ii. p. 1017; Reeve, 
Conch. Icon. v., Bulimus, t. 36. fig. 214°. 
Orthalicus (Mesembrinus) fenestratus, H. & A. Adams, Gen. Moll. ii. p. 1574. 
Bulimulus (Scutalus) fenestratus, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 528°. 
Bulimulus (Otostomus) piescheli, v. Mart. in Monatsb. Akad. Wiss. Berl. 1863, p- 541°; Malak. 
Blatt. xii. p. 22, t. 1. fig. 10 (1865) ”. 
Bulimus piescheli, Pfr. Monogr. Helic. Vivent. vi. p. 88°. 
Bulimulus (Scutalus) piescheli, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 509°. 
Bulimulus piescheli, Strebel, Beitr. Mex. Land- und Siissw.-Conch. v. p. 77”. 
Hab. W. Mzxtco: Manzanillo near Colima (Pieschel 5-8 1°), 
Mexico, without nearer indication of locality 1 (Liebmann 22-5), 
This species is somewhat intermediate between O. dombeyanus and O. lilacinus, but 
is nearer to the latter, from which it differs chiefly in the much rougher, wrinkled, and 
malleated sculpture. The apex is unicolorous white with a reddish hue, and smooth; 
the bands commence on the third whorl, and only three are visible on all whorls except 
the last, the two others being concealed by the following whorl. The sculpture consists 
of broad raised wrinkles, most of which are covered by much finer undulated lines. 
I have seen only one specimen (Tab. XII. fig. 1), collected at the above-mentioned 
locality and given to the Berlin Museum by Herr Pieschel, once Secretary of the 
Prussian Embassy to Mexico. From Reeve’s figure? it is evident that the original 
specimen of Pfeiffer’s Bulimus fenestratus in Cuming’s collection belongs to the same 
species; but in the German collections this name has been applied by Philippi to 
another species, in which the light intervals between the dark bands and streaks have 
not the appearance of bow- or bay-windows, but the interrupted brown bands them- 
selves represent square windows. 
Pfeiffer himself seems to have confounded afterwards his own species with another, 
figured by Philippi as “B. fenestratus” (see O. dunkeri, p. 207), as the specimen from 
