6 Ccel. 
IV. Ccelenterata. 
[ 1918 ] 
II. — SUBJECT INDEX. 
GENERAL AND MISCELLANEOUS. 
0803 
The coral-reef problem ; Cole, 26. 
Lea r6cifs coralliens ; Moreau, 69. 
An expedition to the coral reefs 
of Torres straits ; Mayer, 64. 
The glacial -control theory of coral 
reefs; Daly, 28. 
The Gorgonaceac as a factor in the 
formation of coral reefs ; Cary, 18. 
Biologische Riff-Untersuchungcn im 
Golf von Suez ; Bannwarth, 3. 
Ecology of the Murray Island coral 
reef ; Mayer, 65. 
Corals from Murray, Co<5os-Keeling, 
Fanning Islands, and some corals from 
Kermadec Islands ; Vaughan, 85. 
Die osttliiiringer Graptolithen, ilue 
Erhaltung und Bedoutung fur die 
Zonenforschung ; Hundt, 50. 
The inorganic constituents of Alcony- 
aria ; Clarke and Wheeler, 24. 
Rigidite et taille chez les coelenteres ; 
Willem, 88. 
Medusoid bells and vibration pheno- 
mena ; Thompson, 82. 
Production of Medusoid forms from 
gels ; Hatschek, 49. 
Note on relative values of the different 
characters in the Actiniaria ; Stephen- 
son, 80. 
Staining sections of Actiniaria for 
nematocysts ; Stephenson, 79. 
Der Kelch als systematische Charak- 
ter bei den Alcyonacecn ; Molander, 68. 
La Fossilisation des Zoanthaires ; 
Cayeux, 20. 
Weight per acre of spicules in 
tissues of living colonies of Gorgonaceac ; 
Cary, 18. 
Gorgonaceae of Florida-Antillean 
region; Cary, 18. 
Association of Diphasia digitalis 
and Plumularia badia ; Jiiderholm, 55. 
Zoozanthellae in mesogloca of 
Actiniaria ; Stephenson, 80. 
Note sur une Actinie ( Thoracactis 
n.g. lopsenti n. sp.) et un Annelide 
polychete ( Hermadion fauveli n. 'sp. 
commensaux d’une Eponge silicieuse 
( Sarostegia oculata Topsent) ; Gravier, 
45. 
STRUCTURE. 0807 
General. 
Comparative anatomy of the nourish- 
ing individuals, and systematic division 
of the thecaphore hydroids ; Broch, 14. 
Structure and histology of Perigoni- 
nius cidarilis and gemmaria implexa 
var. ncapolilana ; Bruckner, 15. 
Ilalcuriidae ; Carlgren, 19. 
Alcyonuria ; Molander, 66. 
Special Organs. 
Naturo of Madreporarian skeleton ; 
Matthai, 62. 
The dorsal mesenteric filaments in 
the siphonozooids of Peunalulacea ; 
Lightbown, 58. 
La micros! rueture du squelette des 
Stroma to poridac ; Cayeux, 20. 
Chemical composition of skeletons 
of Alcyonuria ; Cayeux, 20. 
Note oil structure of mesogloea of 
certain Irish Actiniaria ; Stephenson, 
79. 
PHYSIOLOGY. 0811 
Physiological senescence in Hydro- 
medusae ; Child, 22. 
Function of stellate cells of meso- 
gloeal cell-plexus of Actiniariu ; 
Stephenson, 80. 
Ciliary action in the internal cavities 
of Pleurobrachia pileus ; Gemmill, 37. 
The influence of the marginal sense 
organs on functional activity in 
Cussiopea xamachana ; Cary, 17. 
Note on presence of zooxanihellae in 
the gonads of Actiniaria ; Stephenson, 
80. 
DEVELOPMENT. 0815 
General. 
Die geschlechtliche Fortpflanzung 
der deutschcn Susswasserpolypen ; 
Boecker, 9. 
Sexual dimorphism in Grammaria ; 
Broch, 13. 
