166 History of Conchology in the United States. 
His last paper in the Proceedings of the Academy — 
diagnoses of forty-nine new species of these shells, from Ala — 
Mr. Lea is still actively engaged in his favorite pursuits, 
and we may expect many able papers yet from his hands. We 
hope that he will find leisure to monograph the Naiades, with 
the same fulness of description and excellence of illustration, 
which distinguishes Binney’s Terrestrial Mollusks. Such a work 
would be the crowning glory of a life nobly and usefully spent 
in the pursuit of science. : 
_'T. A. ConraD, the eminent geologist, in the same year 
which Mr. Lea printed his first article on the Naiades, gave to the 
world through the Journal of the Philadelphia Academy, (1s 
ser., vol. vi, p.205: Aug. 1880,) an article on the Geology of 
Maryland, containing a list of recent shells of the coast of that 
State. This was followed, all through the first series of the same. 
Journal by papers on recent and fossil mollusca. The most im 
—— of these is one containing “Descriptions of new Marin 
hells from Upper California,” vol. vii; 1837. This article gives 
descriptions and figures of eighty species. In the second series of 
that Journal are several papers, by this author, on marine 42 
fluviatile mollusca. Several of them are beautifully illustrated. 
noticeable article is the “ Monograph of the genus Argonau 
with descriptions of five new species ;” vol. ii, p. 831: 1854. 
Mr. Conrad has also contributed to this Journal for a period 
of over twenty years, and to the Proceedings of the Academ 
of Natural Sciences. His most important paper in the Procee 
ings is an able “Synopsis of the Family of Naiades of North 
Unfortunately, the author, with a sincere desire to 
cific names which will always stand good among the majority ° 
C 
cies of Nalades, over those of Mr. It is worthy of remah’ 
that Say, Conrad, and Dr. Jay, each of whom retain a 0 
af Bates rad, y: 
should be considered competent to make a final determination i. 
Bad 
