2A o The American Naturalist. [March, 
Fresh-water sponges—what hapi are not. ‘Microscope, X., 
p. 140, 1890. 
Fresh-water sponges—what they are; 7 c., p. 161, 193, 
2. 
Ruce, J. G—The sponge fisheries of Florida. Bull. U. S. F. 
Ci VIL, p- 22; 1889: | 
* Denpy, A.—Observations on the West Indian chalinine 
sponges, with description of new species. Trans. Zool. Socy. 
London, XII., 349, 1890. 
CGELENTERATA. 
AcassiZ, L.—The anatomy of dstrangia dane. Smithsonian 
Inst., 1889.—Six plates 4° by Sonrel, with explanation by J. W. 
Fewkes. 
Haskins, B. W.—Explanation of Mr. H. E. Valentine’s obser- 
vations of the Hydra. Microscope, X., p. 52, 1890.—Nothing new’ 
Stokes, A. C.—To collect Hydra and Vorticella. Microscope, 
X., p. 69, 1890. 
HEILPRIN, A.—The corals and coral reefs of the western waters 
of the Gulf of Mexico. Proc. Phila. Acad., 1890, p. 303.—List 
of species and description of reefs at Vera Crus: 
BiceLow, R. P.—Notes on the physiology of T max- 
ima. J. H. U. Circ., IX., 61, 1890.—Feeding, etc., of “ Physalia.” 
The marginal sense organs in the Pelagiidæ. J. H. U. 
Circ., IX., P. 933, 1890. 
Dana, J. D.—Coral and coral islands, III. edit., N. Y., 1890. 
—Vide Am. Nart., XXIV., p. 933, 1890. 
McMorricu, J. P.—Contributions on the morphology of the 
Actinozoa. I. The structure of Cerianthus americanus. Jour. 
Morphol., IV. 131, 1890. 
ECHINODERMATA. 
Cracin, F. W.—Sea-urchin excavations at Guaymas, Mexico. 
Am. Nat., XXIV., p. 478, 1890. 
Ives, J. E—Echinoderms from the northern coast of Yucatan 
and the harbar of Vera Cruz. Proc. Phila. Acad., 1890. p: 317- 
