BUDDING IN COMPOUND ASCIDIANS, BASED ON 
STUDIES. ON GOODSIRIA, AND PEROPHORA. 
W. E. RITTER. 
CONTENTS. 
PAGE 
cA cee ©) @) 1) STMRSTVAS ST) UREA © 72.02) 55 79ers ee ee ae meer tages ee Pree ae ga 149 
Tere NUATHERD ATC @ RC EUNTOU irc core see reese ene en ek ee eet 150 
2:2 DESCRIPTION OF THE! SPECURS ese ee ae ee ee eee ISI 
Bx LOOMS IN) (REE (COL ON West cece sateen cree eco cess eee 158 
4. DEVELOPMENT OF THE UNDIFFERENTIATED BUD.........-2..20:::-200--- 163 
IK. QOEVELOPMENT OF THE ORGANS 2. oc 22020stjoc2.ceshastteccenmetasiacnagne stesso 165 
a. Lhe Branchial and Peribranchzal SACS pen. 165 
bs) tke, Disesieve: Uract and is Appendage sues sa ee 171 
Cle LIE MP CUACAT ALUNL MAILE: SLL EL TL Ue crere te Deee ree ee 174 
Lhe Ly pophy sts ard UG Aig TtO 1 res eae eee eee eee ee 176 
(a)) Lhe Gangelo-hypophiyseal Duchenne 176 
(BY OLDE GOZO oes ces esos ee 178 
Cnr Lee: GEretal Sy SCCM <8 eh ewen teens etiag Suet aes soe eee ee 184 
Ba ER © PEO ReAG JASN INGE © GIN Soe eee eeyrecse ae besten eee eee 187 
f.) INTRODUCTORY. MIATERDAIS TR CHINTQUWeteccteccrerteree ee eeseareee ee LOT, 
25 RELATION OF THE BUD) TO) GHEE) STOLON cesses) eee eee 190 
3: (PERICARDIUM AND) PLEAR@):... fisccs.ccsccs.cnctacestes.00ecuseetsaersneeeces See ee 195 
Ant VELWPO REY SIS IA NID GAN GILIO Nit eseie: sotaercbeeee eerie teens eee eee OD 
C. GENERAL CONCLUSIONS AND REFLECTIONS =...........4..-2+. 209 
I. APPLICATION OF GENERAL DEVELOPMENTAL PRINCIPLES TO 
ZAIN) INDE RIP RURAD TOI (OB eT) HB) ACTS asa oases cee eee 209 
2. ON THE QUESTION OF DIFFERENT TYPES OF BUDDING AMONG 
ARUN T GATES 4225 22 15 steed dese sessdesite pon test a cacen sane tere ee ee 213 
3. THE RELATIONSHIP BETWEEN THE POLYSTYELLIDAE AND THE 
BOTRYLLIDAE (see 6, under Summary of Results in General). 
PD SUMIME AGRO) | OUR REBT SU ME TS Seesaw east ec cenc ape pec eeeence eee ase ne 220 
INTRODUCTION. 
THE material that has served as the basis of the paper here 
presented was collected by myself at various points on the 
California Coast during the years 1892 and 1893. A con- 
siderable part of the investigation has been carried on under 
