MECHANISM OF THE ODOXTOPHORAL AFPAUATUS 

 IN SYCOTYPUS CAXALICI'LATUS 



This paper gives the results of some four or five weeks spent in 

 dissecting and experimenting on the odontoplioral a])piir;itus in 

 the large familiar whelk or winkle, Sycoiijpiis caiutl iciilafus i Lmn. ) ' 

 The work was done at the Marine Lahonu-.iv at \\.H>.r> Ih.lc. 

 Mass., during the summer of 1905. I dcsifc to f.\[)?c^> li» re mv 

 thanks to the direction of the laboratory iov the niatenal fiiniislifd 

 and privileges extended, especially to Dr. (J. A. Drew to wliom I 

 am indebted for advice and encouragement. 



'Phc object of the paper is to show the modus opera, uli of the 

 whole odoutophoi-al mechanisni as fotiii.l in the iovm scLvtc,!. :„,.l 

 also, inci.l,M.tallv to .lescfii.e the nervous supplv of \hv iumm-I,., 

 that control the incchanisni. To this rnd the anatoniv of thr part, 

 ha. to l.r deMiihol in .oine .h-tail. but it i. liopr.l that tlir h^ni<. 



