MUSEUM OF COMPARATIVE ZOOLOGY. 33 



Memoirs: — 



Vol. XXX. 



Xo. 4. The Galapagos tortoises. By Samuel Garman. pp. 40. 42 

 Plates. January, 1917. 



Vol. XLVI. 



Xo. 2. Hawaiian and other Pacific Echini. The Echinoneidae, Xucleo- 

 litidae, Urechinidae, Echinocorythidae, Calymnidae, Pourtalesiidae, 

 Palaeostomatidae, Aeropsidae, Palaeopneustidae, Hemiasteridae, and 

 Spatangidae. By Hubert Lyman Clark, pp. 203. 18 Plates. March, 

 1917. 



Report: — 



1915-1916. pp. 40. December, 1916. 



Zoological Laboratory. 



Contributions : — 



277. Wenrich, D. H. — Notes on the reactions of bivalve mollusks 



to changes in light intensity: Image formation in Pecten. 

 Journ. animal behav., July-August, 1916, 6, p. 297-318. 



278. Arey, L. B. — The influence of light and temperature upon the 



migration of the retinal pigment of Planorbis trivolvis. Journ. 

 corny, neurol., August, 1916, 26, p. 359-389, 1 pi. 



279. Walton, A. C. — Reactions of Paramoecium caudatum to light. 



Journ. animal behav., September-October, 1916, 6, p. 335-340. 



280. Walton, A. C. — The 'refractive body' and the 'mitochon- 



dria' of Ascaris canis Werner. Proc. Amer. acad. arts & sci., 

 October, 1916, 52, p. 253-266, 2 pis. 



281. Parker, G. H. and Titus, E. G. — The structure of Metridium 



(Actinoloba) marginatum Milne Edwards with special refer- 

 ence to its neuro-muscular mechanism. Journ. exper. zobl., 

 November, 1916, 21, p. 433-459, 1 pi. 



282. Parker, G. H. — The effector systems of actinians. Journ. 



exper. zobl., November, 1916, 21, p. 461-484. 



283. Walton, A. C. — A case of the occurrence of Ascaris triquctra 



Schrank in dogs. Journ. parasitol., September, [November], 

 1916, 3, p. 39-41. 



284. Parker, G. H. — Nervous transmission in the actinians. 



Journ. exper. zobl., January, 1917, 22, p. 87-94. 



285. Parker, G. H.— The movements of the tentacles in actinians. 



Journ. exper. zool., January, 1917, 22, p. 95-110. 



286. Parker, G. H. — Pedal locomotion in actinians. Journ. exper. 



zool, January, 1917, 22, p. 111-124. 



287. Parker, G. H. — The responses of hydroids to gravity. Proc. 



Nat. acad. sci., February, 1917, 3, p. 72-73. 



