COMMUNICATIONS . 



I. Theodore Gell. Prodrome of a Monograph of the Pinni- 



pedes. pp. 4-13. [Issued July, 1866.] 

 II. J. A. Allen. Notice of a Foray of a Colony of Formica san- 

 guinea upon a Colony of a Mack species of Formica, for the 

 purpose of making slaves of the latter, pp. 14-16. [Issued 

 July, 1866.] 



III. A. E. Verrlll. Synopsis of the Polyps and Corals of the 



North Pacific Exploring Expedition, under Commodore C. 

 Eingold and Captain John Eogers, U. S. N., from 1853 to 

 1856. Collected by Dr. Wm. Stimpson, Naturalist to the 

 expedition. With Descriptions of some additional Species 

 from the West Coast of North America. [Continued from 

 Vol. IV.] Part III. Madrepokaria. With tico plates, pp. 

 17-32. [Issued July, 1866.] pp. 33-50. [Issued January, 

 1867.] 

 XIII. Part IV. AcTiNARLi. With a plate, pp. 315-330. [Issued De- 

 cember, 1868.] 



IV. Burt G. Wilder. Eesearches and Experiments upon Silk 



from Spiders, and upon their Keproduction, by Eaymond 

 Maria de Termeger, a Spaniard. Translated from the Ital- 

 ian. Eevised by B. S. Wilder, pp. 51-79. [Issued in January 

 and June, 1867.] 



V. Thomas McIl wraith. List of Birds observed near Hamilton, 



Canada West. pp. 79-96. [Issued June, 1867]. 



VI. Alpheus Hyatt. Observations on Polyzoa. Suborder Phylac- 



tolaemata. [Continued from Vol. IV.] pp. 97-112. [Issued 

 October, 1867.] 

 VIII. pp. 145-160. [Issued January, 1868.] 



X. pp. 193-232. With a plate. [Issued April, 1868.] 



VII. Horace Mann. Elora of the HaAvaiian Islands, p. 113-144. 



[Issued October, 1867.] 

 IX. pp. 161-176. [Issued January, 1868.] pp. 177-192. [Issued 

 April, 1868.] 



XI. pp. 233-248. [Issued July, 1868.] 



XII. Elliott Coues. Catalogue of the Birds of North America 

 contained in the Museum of the Essex Institute ; with which 

 is incorporated a List of the Birds of New England. With 

 brief Critical and Field Notes, pp. 249-272. [Issued July, 

 1868.] pp. 273-314. [Issued December, 1868.] 



