936 Selected Articles in Scientific Serials. [Nov., 1881. 
modifications in plants, illustrating his remarks. by special refer- 
- ence to the presence or absence of the thorns of roses. 
July 5.—A paper entitled “ The snare of the ray spider, Apeera 
vadiosa, anew form of orb-web,” by Rev. H. C. McCook, D.D., 
was presented for publication. Mr. Meehan noted the discovery 
of Lilium martagon for the first time in the United States, and 
also spoke of the parasitic character of the Rocky mountain 
snow plant.. In continuation he made some remarks on what 
might be called “floral clock-work,” with special reference to the 
opening and closing of the flowers of Zalinum teretifolum. | 
July 19.—A paper entitled “A revision of the Cis-Mississipp! 
Tertiary Pectens of the United States,’ by Angelo Heilprin, was 
presented for publication. : 
uly 26.—A note from Edw. Potts was read defining a new 
species of fresh-water sponge of the genus Carterella. 
Aug. 2.—A paper entitled “ Remarks on the molluscan genera 
Hippagus, Verticordia and Pecchiola,” by Angelo Heilprin, was 
presented for publication. : Sue 
pt. 13.—Mr. Ryder gave some of the results of his studies © 
embryo oysters. ot 
ept. 20.—A paper entitled ‘‘ Note on the approximate position 
of the Eocene deposits of Maryland,” by Angelo Heilprin, was 
presented for publication. 
Sept. 27—Mr. Ryder spoke of the anatomy of Arca net 
and also considered Balfour's and His and Rauber’s views regare 
ing the growth of embryo fishes. ; 
Oct. 4.—The Rev. Dr. McCook explained how the ee 
spiders prepared their webs. Mr. Ryder spoke of a genie 
cavity in the germinal disc of fishes, and its connection with th 
blood-vessel system. 
-_ SELECTED ARTICLES IN SCIENTIFIC SERIALS. 
heet 
at any latitude, by W. J. McGee. Marine fauna ie as Laut af 
st 19.- 
_ Locomotion and organ of locomotion of Cyclostoma elegans, an 
On the development 
On the allantois ° 
