HYDROMEDUSjE. 
Gcel. 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. 
Gonionemus , 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. murbachii , morphology, Perkins, Science xix, 
p. 250 & 251 ; G. vertens , Gorka, Allatt. Kozl. Magyar Tars, i, 1902, 
p. 105, fig. 2 ; G. murbachii , reaction to electric and photic stimuli, 
Yerkes, Biol. Bull, vi, pp. 84-95. 
G. depressum, 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 , II. pallens , Antarctic regions, Jaderholm, Arch. zool. exp. 
Notes (4) iii, pp. iii & iv, n. spp. 
Halicornaria vagce, II. 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, 
%. 8.' 
Hybocodon forbesii, Bahamas, Mayer, t. c. p. 8, pi. ii, fig. 13 ; II. prolifera , 
double reproduction, Perkins, Amer. Natural, xxxviii, p. 516; II. 
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 calif ornica , San Diego, Torrey, Univ. Calif, publ. Zool. ii, 
p. 9 ; +//. multispinosa , Maryland, Ulrich, Maryland geol. Surv. 1904, 
p. 433, pi. cxxi, figg. 1-9, n. spp. 
llydrallmania falcata , p. 124, pi. xxxviii, figg. 1-4, II. distans, p. 126, 
figg. 5-9, H. franciscana , p. 126, fig. 10, Nutting, Special Bull. U. S. 
Mus. 1904. 
Lafoeina longitheca , Antarctic regions, Jaderholm, Arch. zool. exp. 
Notes (4) iii, p. iv, n. sp. 
Lampra soda , 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. 
Liriope 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 gracilicaulis , South Japan, Jaderholm, Arkiv Zool. i (3), p. 299, 
pi. xiv, figg. 3 & 4, n. sp. 
\Milleaster n. gen. for M. incrustans, M. subramosus n. spp., Ulrich, 
Maryland geol. Surv. 1904, pp. 436 & 437, pi. cxxi, figg. 10 & 11. 
\Myriopora 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. 
O. austro-georgice , Antarctic regions, Jaderholm, Arch. zool. exp. Notes 
