528 Comparative Animal Physiology 



187. Pantin, C. F. a., ]. Exper. Biol. 13:111-130, 148-158, 159-169 (1936). Excita- 

 tion of crustacean muscle: Neuromuscular facilitation (111-130); Quick and slow 

 responses (148-158); Inhibition (159-169). 



188. Parnas, J., Pflilg. Arch. ges. Physiol. 134:441-495 (1910). High efficiency of 

 Pecten smooth muscle. 



189. Plenk, H., Ztschr. Mikr. Anat. Forsch. 33:605-624 (1933). Histology of ceph- 

 alopod muscle. 



190. PosTMA, N., Proc. Ned. Akad Wtnsch. Amst. 44:1151-1158 (1941). Muscle 

 tone, Helix. 



191. Pringle, J. W. S., ;. Exper. Biol. 16:220-231 (1939). Slow and fast motor sys- 

 tems in cockroach. 



192. Pringle, J. W. S., /. Exper. BioL 17:8-17(1940). Multiple innervation of insect 

 muscle. 



192a. Pringle, J. W. S., ]. Physiol. 108:226-232 (1949). Muscle rhythm, flies. 



193. Prosser, C. L., and Young, J. Z., Biol. Bull. 73:237-241 (1937). Repetitive 

 excitation of giant fiber in squid. 



194. Pumphrey, R. J., ). Exper. Biol. 15:500-505 (1938), Double innervation of clam 

 muscle. 



195. Quincke, H., and Stein, J., Ergefcn. P/iysio/. 34:907-1064(1932). Comparative 

 chronaxies. 



196. Ramsay, J. A., ). Exper. Biol. 17:96-115 (1940). Contractile properties of buccal 

 retractor of Helix. 



197. Ramsay, R., and Street, S. F., ]. Cell. & Comp. Physiol. 15:11-34 (1940). 

 Isometric length-tension relations of isolated muscle fibers. 



198. Ramsay, R., and Street, S. F., Biol. Symp. 3:9-34 (1941). Mechanical factors 

 in muscular contraction. 



199. RiESSER, O., Arch. Exper. Path.-Pharm. 172:194-212 (1933). Contraction rate, 

 drug effects, holothurian muscles. 



200. Ritchie, A. D., The Comparative Physiology of Muscular Tissue (1928). Cam- 

 bridge Univ. Press. 1 1 1 p. 



201. RoszA, C, Szent-Gyorgi, A., and Wyckoff, R. W. C, Biochem. et Biophysica 

 Acta 3:561-569 (1949). Electron microscopy of muscle proteins. 



202. Rosenblueth, A., Biol. Symp. 3:111-120 (1941). Conduction in smooth muscles. 



203. Rosenblueth, A., Davis, H., and Rempel, B., Am. ]. Physiol. 116:387-407 

 (1936). Action potentials of smooth muscle. 



204. Rosenblueth, A., Hoagland,et al.. Am. ]. Physiol. 133:724-735 (1941). 

 After-potentials of striated muscle. 



205. Rosenblueth, A., and Rioch, D. McK., Am. ]. Physiol. 106:365-380 (1933). 

 Diffusion of mediator in smooth muscle. 



206. Ross, D. M., /. Exper. Biol. 22:21-31 (1945). Drug effects on facilitation in 

 actinians. 



207. Ross, D. M., ;. Exper. Bjo/. 22:32-36(1945). Active agents (possibly tyramine) 

 from extracts of actinians. 



208. RucKERT, W., Arch, exper. Path. 150:221-235 (1930). Tonic properties of fetal 

 muscle. 



209. Schmitt, F. O., et al., Ann. New York Acad. Sci. 47:799-812 (1947). X-ray 

 diffraction and electron microscopic study of muscle, review. 



210. Sichel, F. J. M., Am. ). Physiol. 133:446-447 (1941). Elasticity of sarcolemma 

 and whole muscle fiber. 



211. SiCHEL, F. J. M., and Prosser, C. L., Am. }. Physiol. 128:203-212 (1942). Ab- 

 sence of refractoriness in local contractions of isolated muscle fibers. 



212. Singh, I., /. Physiol. 92:62-90 (1938). Interaction of ions, drugs and electric 

 stimulation of Mytilus muscle. 



213. Smith, C, and Click, D., Bio/. B»n. 77:321 (1939). Cholinesterase in inverte- 

 brate tissues. 



214. Smith, C, et al., Biol. Bull. 79:377 (1940). Cholinesterase content, ACh 

 sensitivity of Ccrebratulus. 



215. SoLF, v., Zool. )ahrh., Aht. allg. Zool. u. Physiol. 50:174-264(1931). Contrac- 

 tion time, orthopteran muscle. 



