THE - CONCHOLOGISTS’ - EXCHANGE 7 
GENUS MASTUS. 
M. chion, Pfr. Soliman Range. 
*M. polygyratus, Pfr.—Bender—Abbas. 
M. pullus, Gray.—A fghanistan. 
The above has been referred by me to Gen. 
Runina; altogether I think now Mastus is 
sufficiently distinct from the former in being 
always smaller and never truncate. 
*The species marked with an asterisk are not rep- 
resented in my collection and I should be much 
obliged to anybody who should be able to send 
them to me for examination or exchange as 
well as any new species from that country. 
In the lot I have alluded to, were speci- 
mens of a Helix, new for Samarkhand and 
Central Asia, viz. H. Dschulfensis, Dubois, 
and also Patula ruderata var., angulosa,Mouss. 
(The latter is perhaps, the same as Patula rud- 
erata var, opulens, Westerlund, which is itself 
very close to the Japanese P. pauper, Gould.) 
Young Collectors’ Corner. 
HELICES IN FAIRMOUNT PARK. 
PHILADELPHIA. 
BY JOHN FORD, PHILADELPHIA, PA. 
As some account of the Helices in Fair- 
mount Park may prove interesting to your 
younger readers, I take the liberty of sending 
this article. There are about ten prominent 
species inside of the Park limits. These are 
as follows:—AH. albolabris, H. alternata, H. 
arborea, H. bucculenta, HH, concava, H. hir- 
suta, Hl. izera, H. minuta, H. tridentata and 
ff, suffusus. Your at least of this number are 
strictly localized; viz.. . albolabris, HH. con- 
cava, H. minuta and 1, suffusus. 
The others may be found at various points 
in the Park; their distribution depending 
chiefly upon the character of the vegetation. 
Some species affect the bushy hillsides, some 
the woods, and others the open meadows and 
damp places, but in almost every case they 
prefer the under sides of logs and stones ex- 
cept at feeding times when they may be seen 
browsing upon the leaves of adjacent shrub- 
bery. So far, I have found %. adolabris in but 
one place which is at the angle formed by the 
Richmond branch of the Philadelphia and 
Reading Railroad, and the north-west corner 
of Laurel Hill near the end of the bridge. 
Unfortunately there are not many to be seen 
at the present time as the blasting for the new 
River Road destroyed most of the Ailanthus 
bushes upon which they chiefly fed. Only a 
short time before the rocks were removed I 
took over 200 specimens from a space less than 
50 feet square. A number of these were cap- 
tured upon the Ailanthus bushes in the act of 
eating the foul-smelling leaves, a fact which 
seems to prove that no plant is too offensive to 
be used as food by some animal. Very many 
of these specimens were in perfect condition ; 
as may be learned from the sample in the Phila- 
delphia collection on the second floor of the 
Academy of Natural Sciences. The writer was 
the probable discoverer of this colony, which is 
is safe to say has never been equalled in thit 
region either in number or in perfection of 
form and color. 
Nearly opposite to this locality, on the west 
side of the Schuylkill just south of the bridge 
crossing the old carriage road, very many /7. 
ligera and Hf. alternata may be found. Here 
the conditions are much the same as were those 
already described ; large stones being scattered 
about and many Ailanthus bushes growing be- 
tween. But strange to say not a single speci- 
men (so far as I know), of #. albolabris, has 
ever been seen in the vicinity; and what is 
quite as singular, no representatives of the spe- 
cies so plentiful here, have been found with 
the //. abolabris just over the river. 
