a 
CONTENTS. 
I. On the Rhizocephalan genus Thompsonia and its Relation to the 
Kvolution of the Group. By F. A. Ports. 2 plates, 
i2 text-Geures:. . . peek wc etwas 0 bs ees. 
inmprodwmetion -2007 07 oe ooo eale i chs bas oa ee 
Previons: Work on Thompsonia. 2.2...) <0. be eee, alien 
Preliminary Description of Material... .:...<.... keel.) .. 
Whe Hoowoyscem.. ote 045 Oho ee es hie eck Otel eee 
The Structure of the External Saes:. 2... 5.4 .oou. eee wet. . 
Me me tepietiets fee ak Fe eon ee ads cay Se 
The Changes in the Visceral Mass during Development......... 
The Eaberation’ of the Cyprs TWarvee... o 0k ooo cs 2 ns eee 
The Formation of New: External: Saésic. .. 20: oe. dence ee. oe 
Development of Germ Cells in the Root System............... 
The Social Forms of Peltogaster and Thompsonia compared...... 
The Hvolition or Thompsanig 6: 43h s.te nl epee 
Thompson ands Thiyldecoplethusy). sv0023 eres. va edie 
Amended ‘Disenosis.of Genus... 2citawell. bed eudleds:. oss. 
Where pecies OF Mranpsonid.. <2 ....2 4 aed 1g Oe. 
The Influence of the Parasite, onthe Host... 02.020. Lae. Ps 
‘> G10: 1) is ae ora een TS osc AES ae Pye nL eh rg 
Pe tlenarapny agen esi Bek Bis cach ued, s,s bea cs CL 
Il. Hapalocarcinus, The Gall-forming Crab, With some notes on the 
Related Genus Cryptochirus. By F. A. Ports. 3 plates, 
TO: Cex aie Ba 5 ocls 5 6 cde ack ee ee ee 
Honalocarcivus: marsumialis Stimpson... ......... tha aa eee 
Winer HIG Hoo be ha ce sate o cone hwnd eo ee Se 
The Galls in Poetllopora cespitesdigg Am ass aaa. So 
The Galle i. Seratopore hystrig. ines. sco <c so 
Gall formation in Stylophora and Sideropora............... 
Action of Respiratory Current on Individual Polyps........ 
The General Configuration of the Buccal Area............. 
The Puceal Appemdawes'..... co. cuca 6 vcs OOO, (ae 
Beis es ORR Me Be eh oS cd em Ae ow ee vc Ee OR ae 
OU OLR oe 
Tie Meee Seat Line FL anny aoc vo oO A 
POV eS MA OMET 5 oe ao) 9 ote a eo fy nl adic ov co OR ORL OE ek 
A Comparison of Hapalocarcinus and Cryptochirus.............. 
The Affinities of the Hapalocarcinide............00. 0.03 0045.. 
The Hosts of Hapalocarcinus and Crypotochirus................ 
Cem oes cae ay hoes gp diy ae os wg ew ee 9 
POMS TINY gta hs cee ge Neen cick aca eee: 
PAGE. 
