Contents. Vv 
PAGE. 
VI. The Permeability of Cells for Acids. By E. Newron Harvey. . .143-156 
VII. Medusz of the Philippines and of Torres Straits. By A. G. 
Mayer. 3 plates,.7 text-fleures..o0 o..csacy even os 157-202 
PerOEN ON ore. Shee pacar as aniy «ao hog a hs ee 159 
Structure, Physiology, Habits, and Development of the Scypho- 
PIU SE era.) 9 Rd aia bias tate Ale ade ly re 162 
Part I. Seyphomedusz of the Philippine Islands................. 170 
Desenption of Species... . ye ess ed ook ee LO. 
Part II. Hydromeduse of Torres Straits, Australia............... 199 
Deseristion Of Species :o06 5 6. ew. os ss Sere ae 199 
VIII. Report on the Bahama Cerions Planted on the Florida Keys. 
By Pauw Banigem.  Siplatesso. : ois ead demaeton. | 203-212 
New Colonies started on the Florida Keys in 1914............. 209 
Observations on the Adult Specimens of the first generation of 
Piorma-bom Individuals’... oc ae< bs bcs os as tes bs 209 
ART a aE NTR CRIN Pe coal ki tea Vices oes a ale ene, Lene! deine WA 210 
one Kine’s Road Vype” of Cerone... 3. 35): ¢yadeSee hate. oo s 212 
IX. Structure and Polarity of the Electric Motor Nerve-cell in Tor- 
pedoes. By Utric DaniGREN. 6 plates, 6 text-figures. 213-256 
PO RG Stk egal i ER, i eR, 8 dass aah aha RE OL Se owe cen 221 
I eee as eR aa i hl eae al yA Lacs, SR Ces 230 
AGeount at the Mixperimente. oc. so Soe os oc ee eee ee 232 
Denney and COnchiniOns «61h Acid cill ste Be fod iohrow bells IS 251 
PEON EEG oc 3 a, oho Shai asc casts) tai a 2%, ae a 253 
apis Woah Gir TAGES, Sc oc ok oe ey Sess arc eds vince ach bs Ree 255 
