134 Zoology 



No. 162. MAYER, ALFRED G. Ctenophores of Atlantic Coast of North America. 



Octavo, 58 pages, 17 plates, 12 figures. Published 1912. Price $2.75. 

 This paper gives a systematic description, accompanied by drawings from life, 

 of all Ctenophores known to occur off the Atlantic coast of North America from 

 the Arctic Ocean to the tropics. The embryology, physiology, habits, and anatomy 

 of the American Atlantic Ctenophores are also discussed, and reviews of all papers 

 bearing upon these subjects are presented. 

 No. 102. Papers from the Tortugas Laboratory of the Carnegie Institution of 



Washington. Vol. I. Octavo, v+191 pages, 41 text figures, 43 plates. 



Published 1908. Price $2.00. 

 This book contains the following papers, not sold separately: 



JORDAN, H. E. The Germinal Spot in Echinoderm Eggs. 12 pages. 



JORDAN, H. E. The Spermatogenesis of Aplopus mayeri. 24 pages, 5 plates. 



JORDAN, H. E. The Relation of the Nucleolus to the Chromosomes in the Primary 

 Oocyte of Asterias forbesii. 36 pages, 7 plates. 



BROOKS, W. K. Pelagic Tunicata of the Gulf Stream: Part II, Salpa floridano. Part 

 III, The Subgenus Cyclosalpa. Part IV, On Oikopleura tortugensis, a new Ap- 

 pendicularian from the Dry Tortugas, with Notes on its Embryology. 1 6 pp., 8 pi. 



BROOKS, W. K., and B. McGLONE. Origin of the Lung of Ampullaria. 8 pp., 7 pi. 



MAYER, A. G. The Annual Breeding-Swarm of the Atlantic Palolo. 8 pp., I pi. 



MAYER, A. G. Rhythmical Pulsation in Scyphomedusse. 18 pages. 



PERKINS, H. F. Notes on Medusae of the Western Atlantic. 84 pages, 4 plates. 



LINTON, EDWIN. Helminth Fauna of the Dry Tortugas. I, Cestodes. 34 pp., u pi. 



EDMONDSON, C. H. A Variety of Anisonetna vitrea. i page. 



Jordan's paper upon Echinoderm eggs casts doubt upon the theory of the indi- 

 viduality of the chromosomes in inheritance. His paper upon Aplopus shows that 

 one half of the spermatozoa contain 18 and the other half 17 chromosomes, the 

 accessory chromosome apparently being a sex determinant. 



Brooks corrects certain errors in previous descriptions of Salpce, and also de- 

 scribes a new Appendicularian, with an account of its house and its embryology. 



Brooks and McGlone find that there is no reason to believe that there is any 

 ancestral connection or relationship between the lung of the prosobranchiate gas- 

 tropod Ampullaria and that of the pulmonates, although the embryonic history of 

 the lung of Ampullaria shows that the origin of the lung of the pulmonates through 

 the modification of a gill is not impossible. 



Mayer finds that the tidal rise and fall has nothing to do with causing the re- 

 markable breeding swarm of the Atlantic palolo (Eunice fucata), which swarms 

 in great numbers upon the surface of the sea early in the morning of the day of 

 the last quarter of the July moon. 



Mayer also finds that the pulsation of Scyphomedusse is caused by the stimulus 

 due to the maintenance of a slight excess of ionic sodium at the nerve centers, 

 also that sea-water is a balanced fluid for pulsation, containing both stimulants 

 and inhibitors, which exactly offset one another. 



Perkins describes a new species of Cladonema and gives an account of its 

 hydroid, and an Aglaura is also described as new. The habits and embryology of 

 Cassiopea are discussed. 



Linton describes a considerable number of fish parasites from the Tortugas 

 region, and establishes new genera and species. 



No. 103. Papers from the Tortugas Laboratory of the Carnegie Institution of 

 Washington. Vol. II. Octavo, v+325 pages, 62 text figures, 41 plates. 

 Published 1908. Price $3.00. 

 This book contains the following papers, not sold separately: 



COWLES, R. P. Habits, Reactions, and Associations in Ocypoda orenaria. 41 pp., 4 pi. 



STOCKARD, C. R. Habits, Reactions, and Mating Instincts of the Walking-stick. 17 

 PP-, 3 Pi- 



STOCKARD, C. R. Studies of Tissue Growth. I. An Experimental Study of the Rate 

 of Regeneration in Cassiopea xamachana. 42 pages. 



ZELENY, CHARLES. Some Internal Factors Concerned with the Regeneration of the 

 Chelae of the Gulf-weed Crab. 36 pages. 



CHAPMAN, F. M. A Contribution to the Life-histories of the Booby and Man-o'-war 

 Bird. 13 pages, 6 plates. 



CONKLIN, E. G. The Habits and Early Development of Linerges mercurius. 18 pp., 8 pi. 



CONKLIN, E. G. Two Peculiar Actinian Larvae from Tortugas, Florida. 1 6 pp. ,4 pi. 



WATSON, J. B. The Behavior of Noddy and Sooty Terns. 69 pages, 1 1 plates. 



REIGHARD, JACOB. An Experimental Field-Study of Warning Coloration in Coral- 

 reef Fishes. 69 pages, 5 plates. 



