HYDROMEDUSiE. 
Coel 19 
Gemmaria implexa^ Naples, development, anatomy, histology, Hargitt, 
Mt. Stat. Neapel xvi, 4, p. 575, pi. xxii, figg. 27-29. 
Glossocodon tenuirostris, Bahamas, Mayer, Mem. Mus. Brooklyn i, p. 26, 
pi. iv, fig. 33. 
Gonio7iemus, budding tentacles, Hargitt, Biol. Bull, vi, pp. 241-250, 9 figg. ; 
G. , comparative study of muscular tonus. Maxwell, Science xix, 
p. 249 ; G., used in aquaria as a test for artificial sea waters, True, 
Science xix, p. 252 ; G. murbachu, morphology, Perkins, Science xix, 
p. 250 & 251 ; G. vertens, Gorka, Allatt. Kozl. Magyar Tars, i, 1902, 
p. 105, fig. 2; G. murhachii^ reaction to electric and photic stimuli, 
Yerkes, Biol. Bull, vi, pp. 84-95. 
G. depressu7n, Yokohama, Goto, Mark Anniv. Vol. 1903, New York, p. 12, 
figg. 10-13, 21 & 22, n. sp. 
Halecium gracile, Patagonia, Jaderholm, Arkiv Zool. i (3), p. 266, pi. i, 
figg. 2 & 3. 
H. secundum^ H. pallens, Antarctic regions, Jaderholm, Arch. zool. exp. 
Notes (4) iii, pp. iii & iv, n. spp. 
Halicornaria vagce^ H. expansa, South Japan, Jaderholm, Arkiv Zool. 
i (3), pp. 301-304, pi. XV, figg. 1-7, n. spp. 
Halitiara formosa, Bahamas, Mayer, Mem. Mus. Brooklyn i, p. 8, pi. i, 
fig. 8." 
Hyhocodon forhesii, Bahamas, Mayer, t. c. p. 8, pi. ii, fig. 13 ; H. prolifera, 
double reproduction, Perkins, Amer. Natural, xxxviii, p. 516; ff. 
prolifer^ morphology, Perkins, Science xix, pp. 250 & 251. 
Hydra^ regeneration, Morgan, Science xx, pp. 742-748 ; H.^ regeneration, 
ScHULTZ, Biol. Centrbl. xxiv, pp. 310-317 ; H. fusca, Turkestan, 
Daday, Zool. Jahrb. Syst. xxi, pp. 469-554, pis. xxvii-xxx, 5 figg. ; 
H. viridis^ spermatogenesis, Guenther, Zool. Jahrb. Suppl. vii. pp. 139- 
160, pi. xi. 
Hydractinia californica, San Diego, Torrey, Univ. Calif, publ. Zool. ii, 
p. 9 ; \H. multispinosa, Maryland, Ulrich, Maryland geol. Surv. 1904, 
p. 433, pi. cxxi, figg. 1-9, n. spp. 
Hydrallmania falcata, p. 124, pi. xxxviii, figg. 1-4, H. distans, p. 126, 
figg. 5-9, H. franciscana, p. 126, fig. 10, Nutting, Special Bull. U. S. 
Mus. 1904. 
Lafoema longitheca^ Antarctic regions, Jaderholm, Arch. zool. exp. 
Notes (4) iii, p. iv, n. sp. 
Lampra socia, Drontheim, Swenander, Norske Selsk. Skr. 1903, No. 6, 
p. 6, figg. 1-3, n. sp. 
Laodicea ulothrix^ Bahamas, Mayer, Mem. Mus. Brooklyn i, p. 14, pi, iv, 
fig. 30. 
Limnocnida sowerbii, L. tanganyicce, Gravier, Bull. Mus. Paris 1903, 
pp. 347-352. 
Li7'iope scutigera, Bahamas, Mayer, Mem. Mus. Brooklyn i, p. 25, pi. iv, 
fig. 31. 
Lymnorea alexandri, Bahamas, Mayer, t. c. p. 10, pi. i, figg. 1-5. 
Lytocarpus gracilicaidis, South Japan, Jaderholm, Arkiv Zool. i (3), p. 299, 
pi. xiv, figg. 3 & 4, n. sp. 
f MiUeaster n. gen. for M. incricstans, M. subramosus n. spp., Ulrich, 
Maryland geol. Surv. 1904, pp. 436 & 437, pi. cxxi, figg. 10 & 11. 
iMyi'iopora n. gen. for M. verbeeki n. sp., Sumatra, VoLZ, Geol. Pal. 
Abh. vi, p. 102, figg. 36-45. 
Myriothela austro-georgice^ Antarctic regions, Jaderholm, Arch. zool. exp. 
Notes (4) iii, p. ii,' n. sp. 
Netocertoides brachiatum, Bahamas, Mayer, Mem. Mus. Brooklyn i, p. 12, 
pi. i, fig. 7. 
Obelia sp. Bahamas, Mayer, t. c. p. 16, pi. iii, figg. 19 & 20. 
0. austro-georgice^ Antarctic regions, Jaderholm, Arch. zool. exp. Notes 
