ADELOTACTA, HEMICHORDA. 
Verm. 49 
Dicyemennea whitmani , n. sp. from Californian Octopus', Wheeler (392). 
Dicyemodeca n. g. sceptrum , n. sp. from Californian Octopus ; Wheeler 
(392). 
Kunstleria n. g. gruveli , n. sp.: Name for the ciliated urns of Pliymosoma 
regarded as parasitic organisms: Delage & H£rouard (111), p. 40. 
Cf. also Kunstler & Gruvel (192). 
Pompholyxia Fabre Domergue: Name for the ciliated urns of Sipunculus 
regarded as Mesozoan parasites; Delage & H^rouard (111, p. 42). 
Rhopalurci metchnikovi , n. sp. from coelom of Spio martinensis Mesn., 
julini , n. sp. from coelom of Scolelepis fidiginosa (Clpch); Caullery 
& Mesnil (76). 
Stcecharthrum n. g. giardi , n. sp., type of a new family of Orthonectida 
from the coelom of Scoloplos mulleri Rathke; Caullery & Mesnil 
(76). 
HEMICHORDA (including Phoronis). 
General Biology. 
Archimeric Segmentation; Masterman (237). 
Balanoglossus : Habits and Occurrence; Mueller (277). 
B. otagoensis, n. sp., Anatomy; Benham (27). 
Cephalodiscus dodecalophus : Anatomy, Budding, Embryogeny; Master- 
man (236 & 238): Occurrence of Rhabdite-cells in Cephalodiscus ; Cole 
(98). 
Diagrams relating to ccelomic canals and pores and to the pouches of 
the stomochord of Enteropneusta ; Willey (400). 
Enteropneusta : Morphology, p. 295 et ''seep; Limitation of gill-clefts, 
p. 298; Coextension of gill-clefts and gonads, p. 299; Annular ridges and 
depressions, p. 300; Lateral Septa, p. 301; Recession of the Gonads from 
the Branchial Region, p. 302; Proboscis-pores and anterior neuropore, 
p. 304: Anterior trematic complex, p. 309; Regional Pores and Nephric 
Tubules, p. 310; Collar nerve-roots and Pineal Eyes, p. 316; Genital 
Pleurse and Medullary Folds, p. 317; Posterior trematic complex and 
neurenteric canal, p. 320; Stomochord and Pygochord, p. 320; Tongue- 
bars and Thymus primordia, p. 323; Parabranchial ridges and endostyle, 
p. 324; Willey (401). 
Gill-clefts: Theories based upon the anatomy and development of 
Hemichorda ; Masterman (236, 239), Willey (400 & 401). 
Phoronis : Development of P. sabatieri ; Roule (326). 
Ptychodera carnosa : End-vesicle of Proboscis pore-canal, p. 251; Intra- 
epidermal canals of collar nerve-roots, p. 252; Gonaducal line, p. 254: 
Pygochord, p. 255; Willey (401). 
P. flava : Brachybranchiate and Macrobranchiate varieties, p. 228; 
Variability of Proboscis-pores, p. 230; Central Complex of Proboscis 
(Stomochord, Pericardium and Glomerulus), p. 232; Nuchal Skeleton, 
p. 233; Collar nerve-chord and roots, p. 234; Genital pleurae and lateral 
septa, p. 237; Gonads, p. 239; Pygochord, p. 243; Regeneration, p. 245; 
Willey (401). 
Ptychodera ruficollis : Collar nerve-roots, p. 261; Post-branchial Canal, 
p. 263; Discharge of Ova, p. 266; Pygochord, p. 267; Willey (401). 
Spengelia alba : Truncal canals and pores, p. 280; Intestinal canals and 
pores, p. 282; Internal hepatic saccules, p. 283; Splanchnic blood-vessels, 
p. 284; Willey (401). 
Spengelia porosa : Vermiform process of stomochord, p. 269; Lateral 
pouches of stomochord, p. 270; Vestigial nerve-root, p. 271; Truncal 
pores, p. 273; Dermal pits, p. 275; Willey (401). 
1899. [Vol. xxxvi.] e 4 
