MOLLUSCA. 641 
6. Pupa prototypus. 
Bifidaria prototypus, Pilsbry, Proc. Acad. Phil. 1899, p. 400'. 
In general appearance like P. ruprcola, Say, but with only two denticles inside the outer lip, none at the 
base of the columella ; i ‘ i i 
3 parietal fold composed of two laminz, which i 
one more emerging, the left deeply entering. ena 
Long. 23, diam. 1 millim. 
Hab. W. Muxico: Huango (Huingo), State of Michoacan (Mr. & Mrs. Rhoads *), 
N.B.—Pupa gabbi, var mexicanorum, Cockerell, Nautilus, x. p. 143 (1897), does 
not come within the limits of this work: it was found in the rejectamenta of the 
Rio Grande del Norte, near Mesilla, New Mexico. 
SUCCINEA (p. 330). 
Succinea luteola (p. 331). 
To the localities given, add :— 
Hab. N. Centrat Mexico: Lake Palomas, in the Mimbres Valley, State of Chihuahua, 
sparingly [International Boundary Commission: see Dall, Proc. U.S. Nat. Mus. 
xix. p. 365 (1896) ]. 
Also in the drift of the Rio Santa Cruz, a tributary of Rio Gila, at Tucson, Arizona 
(fide Dall). 
Succinea guatemalensis (p. 337). 
Succinea guatemalensis, Pilsbry, Nautilus, xiii. 19, p. 139 (1900) ’. 
To the localities given, add :— 
Hab. 8.E. Mexico: Tabasco (ovirosa *). 
Succinea costaricana (p. 338). 
To the localities given, add :— 
Hab. E. Costa Rica: Bruschik, Alta Tararia (Pittier). 
[14. Succinea globispira. (Lab. XLIV. fig. 12.) 
Succinea globospira, v. Mart. Sitzungsb. Ges. nat. Freunde in Berlin, 1898, p. 158°; Dall, Proc. 
Acad. Phil. 1900, p. 99°. 
Testa ovata, rugoso-striata, succinea; anfr. 23, rapide crescentes, priores 14 spiram obtusam globosam 
formantes, ultimus oblongus, subcompressus, sutura valde obliqua, impressa ; apertura ampla, 4 longitu- 
dinis occupans, ovata, superne modice acutangula, margine externo superne valde, inferne minus arcuato, 
basali late rotundato, columellari stricto, vix arcuato, pertenul. 
Long. 8, diam. 43; apert. long. obliqua 63, diam. 4 millim. 
Hab. Cocos Isuanp (Pittier!, Heller & Snodgrass”). 
Allied to S. crocata and S. modesta, A. Gould, from the Samoa and ‘Tonga Islands, |, 
BIOL. CENTR.-AMER., Terr. and Fluviat. Mllousca, February 1901. 81 
