, % RR. 5 
THE NAUTILUS. 23 
ASPERGILLUM GIGANTEUM Sowb.—This species, the largest of 
the genus, was figured in Stearns’ and Pilsbry’s Catalogue of Japan- 
ese Marine Mollusks, pl. iii, fig. 1. We have lately noticed that 
it was renamed (in 18&9, Le Naturaliste, p. 121) by M. Ménégaux, 
who curiously enough proposes anew the specific name given by Sow- 
-erby in 1888. The specimen is said to be from “ les mers de la Chine.” 
PALUDINA HETEROSTROPHA KrRrLaAND.—I consider this shell 
only as an abnormal production of Campeloma decisum Say. Com- 
paratively few are found here. About ten years ago, I gathered 
quite a lot of them, and among the young of them which were not 
delivered yet, I found this abnormal form, and as near as I could 
guess, I found about one of this form in two or three hundred; and 
so came to the conclusion above stated.—L. H. SrrenNG. 
SHELLS OF MaryLaNnp.—In a recent sending of land shells from 
Cumberland, Maryland, from Mr. Howard Shriver of that place, we 
find four species not before recorded from the State: Omphalina 
fuliginosa Griff., O. inornata Say, Gastrodonta intertexta Binn., and 
Polygyra profunda Say. The latter two are western species, prob- 
ably at or near their (in this latitude) eastern limit. None of these 
were recorded in Pilsbry’s Mollusks of the Potomac Valley, Proce. 
Acad. Nat. Sci. Phila., 1894, p. 11. Polygyra fraudulenta Pils. is a 
particularly abundant species at Cumberland, and the specimens of 
Pyramidula alternata are decidedly keeled. 
NEW PUBLICATIONS RECEIVED. 
On THE MississipPr VALLEY UNIONIDH FOUND IN THE Sr. 
LAWRENCE AND ATLANTIC DRAINAGE AREAS (AMER. Nart., 1896, 
p. 379). 2. Descriptions or rouR New Triassic Untos FRom 
THE STAKED Puiarns or Texas. 3. THE CLASSIFICATION AND 
GEOGRAPHICAL DisrRipuTioN OF THE PrarLty FRESHWATER 
Mussets (Proc. U. S. Nat. Mus., XVIII, 1896), by Charles T. 
Simpson. The first of the above papers considers the origin of such 
Lake and Atlantic drainage forms as Unio liebi, canadensis, borealis, 
hippopeus, Anodonta footiana, subangulata, benedictii, undulata, ete., 
all of which are claimed to be altered Mississippi drainage types, 
which found their way into the Lake drainage during the period 
when the lakes drained into the Mississippi, and subsequently tray- 
elled eastward when the St. Lawrence outlet became established. 
Their advent is thus about coeval with the Glacial period. Unio 
radiatus, ochraceus, heterodon, tappanianus and Marg. undulata are 
believed to be older inhabitants of the eastern country. 
