AUTHOR'S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, APRIL 19 
ON THE REGENERATION AND FINER STRUCTURE OF 
THE ARMS OF THE CEPHALOPODS 
MATHILDE M. LANGE 
THIRTY-NINE ILLUSTRATIONS 
CONTENTS 
Initio cuetiomm sparta Arie beaaee tee cee ce Sewn eee TS tT 1 
IEYUOVETP QUIMTIGONCES ceuctao ory ion oe tats oe Sits Ge ees BGS Basa. Eee See eRe iG oe eee 3 
ENGR CHET tO Meese rene. ees were Lme ee toast el cet arte vores even seal ahey sasnguete et anes ee ch.) 6) average aieore a'e,o- 5 
1. A study of the external changes taking place during regeneration.... 5 
22 Ashistological study: of TegeneratiOnir 6. é Jesh sao 4 swe jcorvs ed oie ays a = 14 
GAO UT CRM BATT Oa sailed he ccredtns Stars ts Ea Nm ced tbone Seatac B svete Bia sic 14 
RPE SITEUES ORGS race ceccate eich s Bin my Se atc ois Nae eels ashen o Madders, acoek ack onala wb Oe 22 
Colne meERvOuUSSySUCIMbes cee whichis chown toa aie IS nla om omit ee tes 26 
SHLUTTODAIAY 5 ebeuchs did ore) a cri Beceies oO toaenccles coe eee kaon tage ince iG Ee daeerio ar et ran ta Oris Scan 32 
ANTUIOSINGSES SG & AURIS, FAK hol Rae ORE DEN CDSE OMEREE Sean ORR Ce SeRPRIEE ES SR ME SEMA 35 
INTRODUCTION 
The ability of the cephalopods to renew lost parts of their 
arms is a fact which has been revealed to us through the dis- 
covery of several specimens whose injured tentacles were in 
the process of regeneration. Verrill (82) found such cephalopods 
off the northeastern coast of North America and Brock (’86) 
reported the presence of similar ones in the Indian Ocean. Eisig 
and Riggenbach (’01) observed the formation of a regeneration 
bud on the tentacle of Octopus de Filipi after autotomy, and 
Hanko (713) published a paper describing an octopus tentacle 
which at the upper end had been split into two parts, each part 
retaining the function of a normal arm. But all these reports 
lack a detailed description of the process of regeneration, no . 
experimental investigation of this subject having been published 
up to the present. At the suggestion of Prof. C. Chun, I decided 
to make a closer study of this phenomenon. I feel indebted to 
the late Professor Chun for this suggestion. Unfortunately, he 
died just as I began my investigations. His assistant, Doctor 
Grimpe, kindly assisted me during the early stages of my work. 
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