82 THE NAUTILUS. 
tically a monograph of the group, although there are numerous 
omissions. 5. ampulla is split into several species formerly (and 
justly) regarded as varieties. 6. vernicosa Gould is described as 
new under the name “8B. secunda.” B. adamsi Mke., which has 
already had several synonyms, figures as “2. subaustralis sp. nov.” 
B. dubiosa, habitat unknown, and B. delorti, Japan, are also de- 
scribed as new. ‘The first is certainly well named. In all 23 spe- 
cies are mentioned, this number ineluding several not entitled to 
that rank. In the monograph published in Manual of Conchology, 
1894, there are 32, not counting “bad” species. 
In his “Contributions a la Connaissance des Mollusques Terrestres 
et d’ Eau Douce de Kaméroun,”’ Mr. Adolf d’Ailly has made a sub- 
stantial addition to the rather meagre literature of west African 
land shells. The shells described were collected by three Swedish 
naturalists, Mr. P. Duzén and Drs. Y. Sjéstedt and J. R. Jungner: 
The Cameroon fauna is rich in species of Ennea, 17 being enumer- 
ated, 8 of them new. The Zonitoid genera Helicarion, Zonitarion, 
Thapsia and Trochozonites are represented by numerous species 
with many new forms. In the Achatinide a new genus, Ganomi- 
dos, is proposed for Achatina Shuttleworthi Pfr. and A. Barriana 
Sowb. The genus Petitia Jousseaume (of tautologic fame) is recog- 
nized for Achatina pulchella Martens, of which Petitia Petitia Jouss. 
and Ach. Smithi Sowb. are reckoned synonyms. Pseudachatina, 
Perideris and Limicolaria are well represented. M. d’Ailly has in- 
dependently arrived at the conclusion that the sculpture of the em- 
bryonic shell is frequently a character of high value in the Pulmon- 
ate snails. Five well-drawn lithographic plates illustrate the new 
species described. 
VALLONIA PARVULA AND PupA Houzincert.—In the October 
Nauritus just received to-day I notice that Vadlonia parvula 
Sterki, is not given as occurring east of Illinois. In the summer 
of 1891 I discovered this species on Put-in Bay Island, Lake Erie. 
The specimens were submitted to Dr. Sterki, and determined by 
him. Associated with it was Pupa Holzingeri Sterki, which is also 
a Mississippi Valley form. The occurrence of these two species so 
far east may be of interest to youu—BrRYANT WALKER. 
1Tn Bihang till K. Svenska Vet.-Akad. Handl. Bd. 22. 
