1389T.| SCIENTIFIC AND BUSINESS PROCEEDINGS. 153 
A lecture on 
A VISIT TO THE GRAND CANON OF THE COLORADO, 
ARIZONA, 
was given by Mr. Cuas. D. Watcort, Chief Paleontologist, United 
States Geological Survey. 
Illustrated by charts, models and: lantern slides. 
A vote of thanks was given the lecturer. 
MARCH 23, 1891. 
STATED MEETING. 
The President, Pror. H. L. FarrcuiLp, in the chair. 
A very full attendance. 
The collection of local fossils recently presented to the Academy 
by Prof. A. L. Arey, was exhibited, and a vote of thanks extended to 
him by the Academy. 
The following paper was read by title : 
CATALOGUE AND SYNONOMY OF THE RECENT SPECIES 
OF THE FAMILY MURICIDAE. 
First Paper. 
By FRANK C. BAKER. 
The following Catalogue is based upon a five years’ study of the 
family ; a majority of the species have been examined, and all the 
literature upon the subject to the present date carefully compiled. In 
many cases the material at my command has been ample for the satis- 
factory adjustment of the synonomy ; in other cases, where the type 
specimens were only known, or where there was a paucity of material 
for examination, I have followed the best authorities, not, however, 
without a careful study of the original figures and descriptions, There 
are several species in this catalogue which will, in all probability, 
become synonyms when an abundance of material is obtained for their 
study, but at present I have thought it best to admit them as valid 
species until more is definitely known concerning them. It will be 
noticed that several references have been omitted after some of the 
