189o.] Record of American. Zoology. 1157 
RECORD OF AMERICAN ZOOLOGY. 
BY J. S. KINGSLEY. 
(Continued from Vol. XXIV., page 1047.) 
I is the intention to catalogue here in systematic order all 
papers relating to the Zoology of North America, including the 
West Indies, beginning with the year 1889. An asterisk indi- 
cates that the paper has not been seen by the recorder. Owing 
to the method of preparation it is impossible to collect in one issue 
all the papers relating to any group, but it is hoped that succeed- 
ing numbers will correct this. Authors are requested to send 
copies of their papers to J. S. Kingsley, Lincoln, Nebraska. 
VERTEBRATA. 
Core, E. D.—The homologies of the fins of fishes Am. NAT., 
XXIV., p. 401, 1890. 
Minot, C.-S.—The concrescence theory of the vertebrate em- 
bryo. Aw. Nar., XXIV., pp. 501, 702, 1890. 
Ayers, H.—Contribution to the morphology of the vertebrate 
head. Zool. Anz. XIII., p. 504, 1890.—Describes sense or- 
gans of the Amphioxus, and discusses segmentation of verte- 
brate head. 4 
Baur, G.—On the morphology of the vertebrate skull. Jour. 
Morph., III., p. 467, 1889 [1890]. 
Herrick, C. L.—Suggestions upon the significance of the cells 
of the cerebral cortex. Microscope, X., p. 34, 1890. 
PORTER, WM. T.—The presence of Ranvier's constrictions in 
the spinal cord of vertebrates. Quart. Jour. Micros. Sci, XXXI., 
p. 91, 1890. 
Minot, C.-S.—Evolution of the medullary canal. Am. NAT., 
XXIII., p. 1019, 1889 [1890]. : 
Corre, E. D.—Synopsis of the families of vertebrates. Am. 
Nart., XXIII., p. 849. 
