HYDROZOA. 
Gcel. 21 
Atlantic, S. argentea , N. Cape, fig., S. tenera , N. Sea, pp. 19 & 20, 
Broch (22). \ 
Sertularia ligulata n. sp., figg., Gulf Manaar, S. fissa n. sp., figg., Ceylon, 
S. rugosissima n. Sp., fig., on algae, Gulf Manaar, Thornley (171) 
pp. 116-118; S. cupressina y Skerries, Co. Dublin, Colgan, Irish 
Natural, xiv, 10, p. 209, 1905 ; S. pumila, spermatozoon, tig., Retzius, 
Biol. Untersuch., New Ser. xii, No. 9, p. 80 ; S. pumilar, Ki^er, Nyt 
Mag. Naturv. xlii, p. 83, 1904. 
Sertularella fallax n. sp. (fragment), Antarctic, S. stolonifera n. sp., figg., 
Antarctic, Hartlaub, Exp. Antarct. Belgica Zool. 1904, pp. 15 & 16 ; 
S. polyzonias , N, Cape, S. tricuspidata, Bonnevie in Nordgaard 
( 128) p. 157 ; S., gen. defined, meridiohalis , S. polyzonias, S. gayi , 
IS. rugosa , N. Sea, S. tamarisca (Schydbowsky Dynamena), fig., Broch 
( 22) t. c. pp. 19, 22, 23 ; S. polyzonias , Skerries, Co. Dublin, Colgan, 
Irish Natural, xiv, 10, p. 209, 1905 ; IS. polyzonias , rheotropism,HALLEZ, 
C.R. Ac. Sci. cxli, pt. 21, p. 841, 1905 ; S. polyzonias , with Molgula 
cystallina attached, Bjerran, Bergens Mus. Aarbog 1905, No. 2, p. 4. 
Sibogita n. gen. geometrica n. sp., figg., genus defined, Maas (115) 
pp. 17 & 18. 
Solmaris corona , Valencia Harbour, M. & C. Delap (43) p. 14. 
Solmundella , development, a study in relation to Scyphonophora, figg., 
Woltereck, Verb. Deutsch. zool. Ges. 1905, pp. 115-122 ; S. bitenta- 
culata , sy lions., figg., corridenda (Haeckel’s double perradial canals, 
and peronia), Ceylon, Browne (26) pp. 153-155; S. bitentacidata , 
figg., synons., Sulu Archip., &c., note on genus, Maas (115) pp. 72-75. 
Staurotheca antarctica n. sp., figg. (fragment), near Dichotoma , Hartlaub, 
Exp. Antarct. Belgica Zool., p. 16, 1904. 
Steganopora n. gen. spinosa n. Sp., figg., Djilolo, cf. Stinipora echinata , 
England & Hickson (53) p. 26. 
t Stromatopora concentrica , Lummaton Hill, Jures-Browne, P. Geol. Ass. 
xix, p. 299 ; +& concentrica (?), Paleozoic strata, Orngea, Co., New 
York, Shimer, Bull. N. York Mus., No. 80 (Paleont. 10), Append. 3, 
p. 235. 
AStylaster sp., fig., in eocene formation of Madagascar, Tornquist, Abh. 
Senckenb. Ges. xxvii (3), pp. 331-333. 
Stylasterina. corrected definition, Stylasteridce , genera in family, England 
& Hickson (53) p. 2. 
Stylaster , genus defined, list of spp., S. eximius , fac. altus, figg., New 
Guinea, fac. dentatus , figg., Salomakie Is., fac. irregularis , Sumbawa, 
fac. minor , figg., New Guinea, &c., S. bilohatus, figg., New Guinea, 
S. multiplex , figg., Sulu Is., S. minimus , figg., Djilolo Passage, near 
S. tibiatus , fig., Sulu Is., S. umbonalis, figg., Celebes, England & 
Hickson, t. c. pp. 2-16 : n. spp. 
Syncorne producta, fig., producing proliferous medusae, Hargitt (86) p. 30. 
Synthecmm tubiger n. sp., Maidive Archipel., fig., S. maldivense n. sp., fig., 
vegetative variation, Borradaile (18) p. 841. 
Thinaria abietina , Hammerfest, T. argentea , N. Cape, T. fificula, Norway, 
T. articulata , thuja , Norway, Bonnevie in Nordgaard (128) p. 157 ; 
T.palans n. sp., figg., Palk Bay, Thornley (171) p. 119. 
Tiaridce, note on sub-family, Sulu-Archip., Tiara papua , fig., pp. 13-15, 
Maas (115) p. 15. 
Tiaropsis multicirrata , Clyde, Browne (24) p. 773. 
Tiara pileata , Valencia Harbour, M. & C. Delap (43) p. 10. 
Tiara sp., fig., Bear Is., descript., T. pileata , fig., Corsica, Maas (113) 
pp. 13-15. 
T. pileata , liberated from Perigonimus repens , Clyde, W. Arran, Oceania 
turrita , octona , episcopalis , as stages in development, Browne (24) 
pp. 760 & 761. 
