THE NAUTILUS. 115 
In Toe Navuritus (Vol. V, page 2), Mr. Wm. A. Marsh de- 
scribed two new Unios collected by bim, of one of which, U. Pleasii 
Mr. Marsh says: “I name this shell after my friend, Mr. Elwood 
Pleas, of Indiana, who collected this species with many other rare 
shells in the interior of Arkansas.” 
Mr. Pleas also collected extensively through Alabama and west- 
ern Florida. Being interested in geology he availed himself of the 
opportunity while in Alabama of securing a large collection of 
Eocene fossils. Mineralogy, botany and entomology also received 
a share of his attention, and in his death nature has lost a sincere 
lover, and science an earnest supporter.—C. W. J. 
PUBLICATIONS RECEIVED. 
CaMBRIAN BRACHIOPODA: GENERA Iphidea AND Yorkia, w1TtH 
Descriptions oF New Spectres of each, and of the Genus Acro- 
thele, by Charles D. Walcott, (Proc. U. 8. Nat. Mus., XIX, 1897). 
Iphidea is a genus of small brachiopods belonging to the Neotre- 
mata of Beecher, possibly with characters that nearly place it in the 
Protremata. The species, of which 14 are known, range from the 
lowest known Lower Cambrian horizon to the upper portion of the 
Middle Cambrian. Five new species are described. Yorkiais a 
new genus of inarticulate brachiopods based upon a new species, Y. 
Wanneri, from the Lower Cambrian near York, Penna. Two new 
forms of Acrothele are also described. 
Dir GEHAUSESCHNECKEN DES GALBERGES UND KRAHNBERGES 
BEI GorHa, von L. Schmidt, (Gratis-Beiblatt zu den “ Gothaer 
Neuesten Nachrichten,” Oct. 1, 1897). A list of 38 species of land 
snails making substantial additions to the Thiiringian mollusk fauna, 
the literature of which has been scant. The slugs have been omit- 
ted. Among the rarer species Azeca menkeana may be mentioned. 
There 24 Helices, including the Zonitide, all of them widely dis- 
tributed species. 
A Srupy oF THE Faminy Pectinide, with a revision of the gen- 
era and subgenera, by A. E. Verrill, (Trans. Conn. Acad., X, 1897). 
The most elaborate study yet made upon the system of this family is 
the subject of Professor Verrill’s paper. The earlier fossil groups 
are not fully considered. In the Cretaceous nearly all existing 
generic and sectional groups had appeared, and probably none has 
