COJSTTENTS, 



PAGE. 



Art. XII.— The Development of a Paleozoic Poriferous 



, Co"BAL. By C. E. Beecher. Plates 9-13 207 



Art. XIII. — Symmetrical Cell Development in the Favosi- 



TiD^. By C. E. Beecher. Plates 14, 15 315 



Art. XTV.— New England Spiders of the Family Attid^. 



By J. H. Emerton. Plates 16-21 220 



Art. XV. — A Provisional List of the Hepatic^ of the 



Hawaiian Islands. By A. W. Evans. Plates 22,23 253 



Art. XVI. — An Arrangement of the Genera of Hepatic^. 



By A. W. Evans 262 



Art. XVII. — On the Ferments contained in the Juice of the 



Pineapple (Ananassa sativa). By R. H. Chittenden, E. P. 



JOSLIN and F. S. Meara 281 



Art. XVIII.— The Nephrostomes op.Rana. By O. C. Farring- 



TON. Plate 24 ... 309 



Art. XIX. — Notes on the Fauna of the Island op Dominica, 



British West Indies. By G. E. Verrill. Plates 25-27 815 



Art. XX.— On a Collection of Land Mollusc a From the 



Island of Dominica, West Indies. By H. A. Pilsbry 356 



Art. XXL -^New England Spiders of the Family Thomisid^. 



By J. H. Emerton. Plates 28-32 359 



Art. XXII. — The Machine Nemerteans of New England and 



Adjacent Waters. By A. E. Verrill. Plates 33-39 382 



Art. XXIIL— Dinophilid^ of New England. By A. E. Ver- 

 rill. Plate 36, Figures 6, 6a 457 



Art. XXIV.— Marine Planarians of New England. By A. E. 



Verrill. Plates 40-44 _....-. 459 



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