The American Naturalist. 
• Verrona by Ristori, 
Scyphophori, 857, i 
Urchins, Excavation of, 728. 
Urchin, 949, 951. 
Sedgwick's Review of " Dissection of 
the Dog as a Basis for the Study 
of Physiology," 67. 
Segmentation Nucleus, 463. 
of Brain, 922. 
of the Head, 915. 
' the Ovum, with Special Refer- 
Mammalia, Minot, 
Scion's Journey in the Zambesi Coun- 
try, 645. 
Sense of Smell in Dogs, Dr. Nomans, 
Sepia, Ontogeny c 
Serpentined Diabases, Mar. 157. 
Signoret, Notice of Death of, 748. 
Silicates, 812. 
Sillaginidse, 860. 
Sillimanite, Mar. 169, 910. 
Silver Lake of Oregon, 970. 
Singhalese, 697. 
Siren, Anatomy o 
SirenidiB, 862. 
Sirenoidei, 854. 
Sixth Toe in A 
Skenidium, 91 
Sketch of the Geology of Spain 
Slave Coast, 804. 
Smilax glauca, 552. 
Smithia, 621. 
Society Islands, Mar. 148. 
Sociological Influences, Ferree, 
Soil of France, 619. 
Solenoglypha, 868, 869. 
Solenostomidoe, 860. 
Some Cases of Solid-hoofed Hogs and 
Two-toed Horses, Auld, 447. 
Some Experiment Station Botany, Mar. 
165. 
Song of the Singing Mouse, Davis, 481. 
Sorting and Transporting Infusoria, 278. 
Sotalia, 1098. 
Soundings in Chushan Archipelago, 261. 
Sparidse, 860. 
Specimens of Fossils, 550. 
of IJyla andersonii, 68. 
Spencer, Notes on the Origin and History 
of the Great Lakes of N. Ameri- 
ca, 491. 
Sperrylite, Feb. 172. 
Sphaerodontidoe, 858. 
Sph!«ronectes, 393. 
Sphei 
Sphenoaon punciaius, 
Sphenodontidse, 864. 
Sphenodontina, 864. 
Sphyrsenidse, 860. 
Spiders, Molting of, 730. 
Spinacidae, 855. 
Spinal Ganglia, 830. 
Spirifer, 991. 
Spiriferina, 991. 
Spirifer cameratus, Feb. 112. 
Spitzbergen, Fauna, of, 824. 
Sponges, 1018. 
Squatinorajidae, 865. 
Staining Central Nervous System, 744. 
Starfishes, 951. 
State of Michoacan, Mar. 141. 
Statical Metamorphism, 720. 
Status of the Algo Lichen Hypothesis. 
