CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF 

 THE MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD 

 COLLEGE. {Continued.) 



E. L. Mark, Director. 



*«• Abbreviations used : — 



B.M.G.Z for Bull. MU9. Comp. ZoSI. 



P. A. A for Proceed. Amer. Acad. Arts and Sci. 



P.B.S.N.H for Proceed. Bost. Soc. Nat. Hist. 



Note. — Copies of the List of Oontributiona, ^Humbert 1-278, will be 

 aent on applicatton. 



277. Wbnhioh, D.H. — Notes on the Reactions of Bivalve Mollusks to Changes in 



Light Intensity : Image Formation in Pecten. Jour. Anim. Behavior, 6 (4) : 

 297-318. July-Aug-, 1916. 



278. AnsT, L. B. — The Influence of Liglit and Temperature upoi; the Migration oi 



the Betinal Pigment of Planorbis trivolvis. Jour. Comp. Neurol., 36 (4) :369- 

 889, 1 pi. Aug., 1916. 



279. Wai/tok, a. C. — Reactions of Paramoecium caudatum to Light. Jour. Anim. 



Behavior, 6 (5) : 336-340. Sept.-Oct., 1916. 



280. Walton, A. C. — The ' Refractive Body ' and the * Mitochondria ' of Ascaris 



canis Werner. Proc. Amer. Acad. Arts and Sci., S3 (5) : 253-266, 2 pis. Oct., 

 1918. 



281. Pabkek, Gr. H., and Titus, E. G. — The Structure of Metridium (Actinoloba 



marginatus Milne-Edwards vrith' Special Reference to its Neuro-muscular 

 Mechanism. Jour. Exp. Zool., 31 (4): 438-459, 1 pi. Nov., 1916. 



282. Parker, G. H. — The Elector Systems of Actinians. Jour. Exp. Zool., 31 (4) : 



461-484. Nov., 1916. 



283. Walton, A. C. — A Case of the Occurrence of Ascaris triquetraSchrankinDogs. 



Jour. Parasitol., 3 (1) : 39-41. Sept. [Nov.], 1916. 



284. Parker, G. H. — Nervous Transmission in the Actinians. Jour. Exp. ZoQI., 33 



(l):B7-94. Jan., 1917. 



285. Parker, G. H. — The Movements of the Tentacles in Actinians. Jour. Exp 



ZoBb, 23 (1): 95-110. Jan., 1917. 



286. Parker, 6. H. — Pedal Locomotion in Actinians. Jour. Exp. Zool., 33 (1) : 111- 



124. Jan., 1917. 



287. Parker, G. H. — The Responses of Hydroids to Gravity. Proc. Nat. Acad. Sci., 



3 (2) : 72-73. Feb., 1917. 



288. Cole, W. H. — The Reactions of Drosophila ampelophila Loew to Gravity, Cen- 



trifugation, and Air Currents. ■ Jour. Ahim. Behavior, 7 (1) ; 71-80. Jan., 1917. 



289. Olmsted, J. M. D. — Geotropism in Flanaria maculata. , ^Jour. Anim. Behayior, 



r (1): 81-86. Jan. 1917. 



290. Parker, G. H. — Actinian Behavior. Jour. Exp.' ZoHl., 23 (2) : 193-229. Feb., 



1917. 



291. REDFiBLDfE.S. P. — The Rhythmic Contractions of the Mantle of Lamellibranchs. 



Jour. Exp. Zool., 22 (2) : 231-239. Feb., 1917. 



292. Redfield, a. C. — The Reactions of the Melanophorcs of the Horned Toad. 



Proc. Nat. Acad. Sci., S (3) : 202-203. Mar., 1917. 



293. Redfield, a. C. ^The Cobrdination of the Melanophore Reactions of the Horned 



Toad. Proc. Nat. Acad. Sci., 3 (3) : 204-206. Mar., 1917. 



294. Pope, P. H. — The Introduction of West Indian Anura into Bermuda. Bull. Mus. 



Comp. Zool., 61 (6) ai7-13i,l2 pis. May, 1917. 



295. Van Heusen, A. P. — The Skin of the Catfish { Amiorus nebulosus) as a Re- 



ceptive Organ for Light. Amer. Jour. Physipl., 44 (2) : 212-214. Sept., 1917. 



296. Parker, G. H., and Van Hbtjsen, A. P. — The Responses of the Catfish, Amlurus 



nebulosus, to Metallic and Non-metallic Rods. Amer. Jour. Physiol., 44 (3) : 

 406-420. Oct., 1917. 

 297.- Parker, G.H. — The Pedal Locomotion of the Sea-Hare Aplysia californica. 

 Jour. Exp. Zool., 24 (1) :l'39-145. Oct., 1917. 



298. Parker, G. H., and Van Heosen, A. P. — The Reception of Mechanical Stimuli 



by the Skin, Lateral-Line Organs and Ears in Fishes, especially in Amlurus. 

 Amer. Jour. Physiol., 44 (4) : 463-489. Nov., 1917. 



299. Parker, G. H. — ThePowerofSactionintheSea-AnemoneCribrina. Jour. Exp. 



ZoBL, 34 (2): 219-222. Nov., 1917. 



