THE NAUTILUS. 115 



Iii THE NAUTILUS (Vol. V, page 2), Mr. Wm. A. Marsh de- 

 scribed two new Unios collected by him, 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, WITH 

 DESCRIPTIONS OF NEW SPECIES of each, and of the Genus Acro- 

 thele, by Charles D. Walcott, (Proc. U. S. 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. Yorkia is 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. 



DIE GEHAUSESCHNECKEN DBS GALBERGES UND KRAHNBERGES 

 BEI GOTHA, 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 Zouitidse, all of them widely dis- 

 tributed species. 



A STUDY OF THE FAMILY Pedinidce, 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 Yen-ill'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 



