TABLE OF CONTENTS. 



SOCIETY ANNALS. 



List of the Present Officers of the Society. (1 page.) 



Prefatory Note, with extracts from the minutes of the annual meeting, May 5th, 1880. (3 pages.) 



Historical Sketch of the Boston Society of Natural History, with a notice of the Linnaean Society of 

 New England which preceded it ; including biographical notices of all the Society's prominent past mem- 

 bers, officers and benefactors. By Thomas T. Bouvb. (250 pages, six floor plans, view of the Museum, and 

 portraits of Benjamin D. Greene, George B. Emerson, Amos Binney, John C. Warren, Jeffries Wyman, 

 Thomas T. Bouv6, Augustus A. Gould, D. Humphreys Storer and William J. Walker.) 



SCIENTIFIC PAPERS. 



N. S. Shaler. Propositions concerning the Classification of Lavas considered with reference to the 

 Circumstances of their Extrusion. (15 pages.) 



, Alpi-ieus Hyatt. Genesis and Evolution of the species of Planorbis at Steinheim. (114 pages, ten 

 plates on nine sheets, one plate of sections ; map and two sections in text.) 



"Samuel H. Scudder. The Devonian Insects of New Brunswich; with a note on the Geological Re- 

 lations of the Fossil Insects from the Devonian of New Brunswick., by Principal J. W. Dawson, LL.D., 

 F.R.S., etc. (41 pages, one plate.) 



W. G. Faelow. The Gymnospora7igia (Cedar-apples) of the United States. (38 pages, two plates.) 



Theodore Ltman. A new Structural Feature., hitherto unknown among Echinodermata, found in 

 Deep-Sea Ophiurans. (12 pages, two plates.) 



W. K. Brooks. The Development of .the Squid, Loligo Pealii Lesueur. (22 pages, three plates.) 



A. S. Packard, Jr. The Anatomy, Histology and Embryology of Limulus Polyphemus. (45 pages, 

 seven plates.) 



Edward Burgess. Contributions to the Anatomy of the Milk- Weed Butterfly, Danais Archippus 

 Fahr. (16 pages, two plates; one cut in text.) 



Samuel F. Clarke. The Development of a Double-headed Yertebrate. (6 pages, one plate.) 



Charles Sedgwick Minot. Studies on the Tongue of Reptiles and Birds. (20 pages, one plate; six 

 cuts in text.) 



Edward S. Morse. On the Identity of the Ascending Process of the Astragalus in Birds with the In- 

 termedium. (10 pages, on6 plate ; twelve cuts in text.) 



LuciEN Carij, The Crania of New England Indians. (-10 pages, two plates.) 



William James. The Feeling of Effort. (32 pages.) 



