HYDROMEDUSiE, GRAPTOLITHIDA. 
Goel. 19 
Pennaria , absorption of hydranths, Thaoher, Biol. Bull, iv, pp. 96-98 and 
op. cit. v, pp. 297-303 ; P. cavolinii , regulation and regeneration 
experiments, Gast & Godlewski, Arch. Entwickmech. xvi, pp. 76-116, 
2 pis., 22 figg. ; P. tiarella , grafting and regeneration experiments, 
Hargitt, op. cit. xvii, pp. 64-91, pis. iv-vii. 
Plumularia halecioides , variations, Billard, Bull. Mus. Paris 1903, p. 57 ; 
P. obliqua, affected morphogenically by moving water, Motz-Kos- 
sowska, C.R. Ac. Sci. cxxxvii, p. 863; P., excretion, Billard, t. c. 
p. 340. 
Polyorchis minuta , British Columbia, anatomy, Murbach & Shearer, 
P. Zool. Soc. London 1903, ii, p. 174, pi. xix, fig. 3, pi. xxii, fig. 1, 
n. sp. 
Ptychogastria polaris (Trachomedusae), anatomy and affinities, Browne, 
Bergens Mus. Aarbog 1903, pt. i, pi 24, pi. iv, figg. 1 & 2, pi. v, 
figg. 6-8. 
Sarsia princeps n. n. for Codonium prirtceps Haeckel, Greenland and 
Spitzbergen, characters, Browne, t. c. p. 8, pi. i, fig. 1, pi. iii, fig. 4. 
Thuiaria hjorti, North Sea, Broch, Bergens Mus. Aarbog. 1903, pt. ii, 
p. 7, pi. iii, figg. 11-14, n. sp. 
Turbularia parasitica , mode of life, Torrey, Amer. Natural, xxxvi, No. 432, 
p. 987 ; T. crocea , T. mesembryantkemum , experiments in regeneration, 
Hargitt, Stud. Lab. Nebraska, No. 57, 32 pp., 9 pis. ; T. crocea , 
T. tenella\ T. larynx , experiments in regeneration and grafting, 
histology, Hargitt, Arch. Entwickmech. xvii, pp. 64-91, pis. iv-vii ; 
T., some factors in the regeneration of, Morgan, op. cit. xvi, pp. 125- 
154, 16 figg. 
Turris breviconis , Alaska, anatomy, Murbach & Shearer, P. Zool. Soc. 
London 1903, ii, p. 170, pi. xviii, figg. 1 & 2, n. sp. 
III. GRAPTOLITHIDA. 
[The following memoirs refer to Graptolithida : — Ami (5), Elles & 
Wood (59), Hall (96-98), Poole (170).] 
SUBJECT INDEX. 
Geography. 
•f British monograph, n. spp., history, classification, structure, Elles & 
Wood (59). 
•fUnited States, Upper Cambrian slates of Nova Scotia, occurrence and 
affinities of Dictyonema, Poole (170), Ami (5). 
t Upper Cambrian slates of Nova Scotia, occurrence and affinities of 
Dictyonema , Ami (5). 
+New South Wales, occurrence of Monograptus , Hall (98). 
tPossibility of correlation of Australian formations with those of the 
Northern Hemisphere, Hall (97). 
Systematic. 
tGraptolites, British, monograph, history, structure, classification, n. spp., 
Elles & Wood, Pal. Soc. Mon. lvii, pp. 103-134, pis. xiv-xix. 
+ Amphiaraptus divergens , South Scotland, p. 122, pi. xviii, fig. 1, var. 
radiatus, p. 123, fig. 2, \A. distant, South Scotland, Hartfell Shales, 
p. 124, pi. xviii, fig. 3, Elles & Wood, t. c., n. sp. 
