TABLE OF CONTENTS. 



PAGE 



I. SeitaboGoto; The Craspedote Medusa Olindias and some of its Natural Allies. (Plates I-III.) 1 



II. Henry S. Pratt: Descriptions of four Distomes. (Plate IV.) ' 23 



III. William A. Loot: A New Cranial Nerve in Selachians. (Plates V-VI.) 39 



IV. Jacob Reighard : The Natural History of Amia calva Linnaeus. (Plate VII.) 57 



V. Charles A. Kofoid : On the Structure of Protophrya ovicola, a Ciliate Infusorian from the 



Brood-sac of Littorina rudis Don.' (Plate VIII.) Ill 



VI. C. B. Davenport: A Comparison of some Pectens from the East and the West Coasts of the 



United States. (Plate IX.) 121 



VII. Gertrude Grotty Davenport: Variation in the Number of Stripes on the Sea-anemone, 



Sagartia lucise. (Plate X.) 137 



VIII. Frank W. Bancroft: Estivation of Botrylloides gascoi Delia Valle. (Plate XI.) 147 



IX. Carl H. Eigenmann: The Eyes of the Blind Vertebrates of North America. V. The His- 

 tory of the Eye of the Blind Fish Amblyopsis from its Appearance to its Disintegration in 



Old Age. (Plates XII-XV.) 167 



X. Herbert Parlin Johnson: Fresh-water Nereids from the Pacific Coast and Hawaii, with 



Remarks on Fresh-water Polychseta in General. (Plates XVI-XVII.) 205 



XI. Henry R. Linville : The Natural History of some Tube-forming Annelids (Amphitrite ornata, 



Diopatra cuprea) 225 



XII. William E. Ritter: The Structure and^ Affinities of Herdmania claviformis, the Type of a New 



Genus and Family of Ascidians from the Coast of California. (Plates XVHI-XIX.) 237 



XIII. R. M. Strong: The Metallic Colors of Feathers from the Sides of the Neck of the Domestic 



Pigeon. (Plate XX.) 263 



XIV. C. R. Eastman : On the Nature of Edestus and Related Forms. (Plate XXI.) 279 



XV. H. V. Neal: The Development of the Ventral Nerves in Selachii. I. Spinal Ventral Nerves. 



(Plates XXII-XXIV.) 291 



XVI. H.S.Jennings: Asymmetry in certain lower Organisms, and its Biological Significance 315 



XVII. Rolfe Floyd: A Contribution to the Nervous Cytology of Periplaneta orientalis, the Common 



Cockroach. (Plates XXV-XXVIII.) 339 



XVIII. Robert Meahns Yerkes : Reactions of Daphnia pulex to Light and Heat 359 



XIX. W. E. Castle and Glover M. Allen : Mendel's La\fcnd the Heredity of Albinism 379 



XX. Porter Edward Sargent: The Torus longitudinalis of the Teleost Brain: Its Ontogeny, 



Morphology, Phylogeny, and Function. (Plate XXIX.) 399 



XXI. Thomas G. Lee: Implantation of the Ovum in Spermophilus tridecemlineatus Mitch. (Plates 



XXX-XXXI.) 417 



XXII. John H. Gerould: Studies on the Embryology of the Sipunculidse. I. The Embryonal En- 

 velope and it Homologue. (Plate XXXII.) 437 



XXIII. G. H. Parker: The Phototropism of the Mourning-cloak Butterfly, Vanessa antiopa Linn. 



(Plate XXXIII.) 453 



XXIV. Ida H. Hyde : The Nerve Distribution in the Eye of Pecten irradians. (Plate XXXIV.) 471 



XXV. Henry B. Ward : On the Development of Dermatobia hominis. (Plates XXXV-XXXVI.) . . 483 



xiii 



