20 
THE CONCHOLOGISTS’ EXCHANGE. 
Diagnoses of a few subgenera in Helicide. 
3y C.F. Ancey, MARSEILLES, FRANCE. 
I, Pristina, Anc. (nov. subg. Hyalinz), 
«Testa parvula, imperforata, cornea, nitens, 
“‘ multispirata; spira depresse conica. Aper- 
“‘tura interdum lamellis radiantibus subserratis 
‘‘in palato sitis insignis.” 
Geog. distribution: Western 
North America. 
Types: “yalina Stearns?, Bland, and Lan- 
simgi, Bland. 
Mr. W.G. Binney put these species, but 
with doubt, in Microphysze, while other au- 
thors consider them as Hyalinze; they differ 
from the latter by anatomic features, and from 
the former by the form of the shell. Altogether 
I am inclined to place the group in Hyaline, 
as a series nearly allied to Conulopolita, 
Boettger (type: C. Raddez, Boettg.) I am 
confident the presence or absence of internal 
laminve or tooth-like processes within the aper- 
ature of Helices are not generic characters ; 
in some instances they are either present or 
absent in closely allied species. I established 
this fact when at work (Le Naturaliste, 1882) 
on the New Caledonian forms, and I now re- 
peat this my opinion in regard to Pristina, and 
Gastrodonta. In the latter the teeth are fre- 
quently absorbed by the animal, when growing 
larger. 
and Arctic 
II. Ccelospira, Anc. (nov. subg. Helicis), 
Testa solidula, supra concava, late et per- 
““spectiva umbilicata, discoidea; spiree anfrac- 
“tus pauci (414), sed regulariter crescentes, 
“ultimus maximus, inflatus, altus, longe ad 
“ apertum fere horizontalem descendens, trans- 
“verse zonatus. Apertura intusbituberculata, 
**externe biscrobiculata. Peristoma expansum 
«basi reflexiusculum.”’ 
Geog. distribution: Atlantic coast of Cen- 
tral America, (Chiriqui Lagoon, Costa Rica). 
Type: “Zelix Mac-Neth, Crosse. This shell 
bears some external resemblance to Cepolis, 
(Helix cepa) Montf. on account of the colour 
and the tubercles of the aperture, but it is 
widely umbilicate, has a concave (not a con- 
vex) spire, and strongly deflected body- whorl. 
It is perhaps more nearly adlied to Sys¢rophia, 
a South American group, and particularly to 
the following section. . 
III. Angrandiella, Anc. (nov. subg. He- 
licis). ‘Testa cornea, brunneo-zonata, de- 
“‘ pressa, aperte umbilicata; anfractus sat reg- 
‘“‘ulariter crescentes; spira parum elevata, ad 
“summum depressa. Apertura extus basi 
“scrobiculata, intus unidentata, obliqua.”’ 
Geog. distribution: Andes of Peru. Type: 
Helix Angranat, Morelet. 
IV, Peecilostola, Anc (nov.subg. Helicis). 
“Testa tenuiuscula, globose depressa, imper- 
“forata, luteo-variegata, brunneo. Spira con- 
“‘vexa, obtusa; anfractus pauci, rapide cres- 
““centes, ultimus maximus, inflatus. Apertura 
“transverse oblonga, emarginata, obliqua. 
“Peristoma alba-incrassatum, tenuiter  re- 
“ flexum, haud continuum.” 
Geog. distribution: Andes of Peru. 
Flelix Farrisi, Pfeiffer: 
Type: 
Notes on some New Orleans Fresh-Water Shells. 
3x H. A. Pirspry, DAVENPORT, Iowa. 
Numerous specimens of Physa collected at 
New Orleans agree perfectly with the descrip- 
tions and figures of the Physa solida Phil., de- 
scribed from that locality, but show conclusive- 
ly that that species is synonomous. with heéer- 
ostropha, Say. The solidity, inflated form, etc. 
adduced as specific characters may be paralleled 
in any large suite of Eastern P. heterostropha. 
It is often elongated, resembling the form 
known as fomzlia Con. 
I have received from several collectors 
specimens from New Orleans labelled “ seg- 
mentina Wheatleyi, Lea.’ The real Wheat- 
leyt is not, so far as I know, found at this 
locality—these shells being referable to the 
species described by Binney, Tryon and others 
as Planorbts havanensis Pfr.,—and placed in 
