NEW GENERA AND SPECIES DISTRIBUTION. 
S%)07ig. 9 
Tetractinellid^s. 
Stelletta australiensis , Carter, (2) Freemantle, S.W. Australia ; S. ba- 
cilli/era var. robusta , Carter, (2) Ports Elliot and Adelaide, Australia ; 
S. globo-stellata , Carter, (2) Galle, Ceylon ; S. reticulata , Carter, (2), lo- 
cality (?) ; Tethya ( Tetilla , auct.) mergucnsis , Carter, (2) King’s Island, 
Mergui Archipelago, W. of Burma (in 1882); Stelletta transient , Welt- 
ner, (82) from Barbadoes, 100 fath., and coast of Mexico ; Tribrachion 
schmidti , Weltner, (32) from Morro Light, Mexico, 250-400 fath. 
Synonymy. 
Carter (6) identifies Spongilla ( Trochospongilla ) erinaceus , Ehrb., 
with S. leidii } Bwk. ; but Yejdovsky (28) states that there is a differ- 
ence in the structure of the statoblasts of the two species. 
Yejdovsky (26) includes Spongilla jordanensis , Kusta, in Euspongilla 
lacustris, of which he recognizes two forms, one var. macrotheca , the 
other sp. lacustris, s. str. Euspongilla jordanensis , Yj., is not Kusta’s 
species, and is closely similar to E. siberica, Dy. ; Ephydatia Jluviatilis = 
Myenia 1, Dy. ; E. mulleri, Leib., = Ephydatia 2 and Myenia 2, Dy., and 
also Myenia 3, Dy. Two varieties of E. mulleri are recognized as 
form A. and form B. ; and var. (?) astrodiscus =■ Myenia 3, Dy. 
Yejdovsky (28) subsequently establishes Ephydatia amphizona, sp. n., 
=:E. mulleri forma B., and restricts E. mulleri , Leib., to his own var. 
astrodiscus. 
Suberites dominicula, Nardo, = Hymeniacidon suberea , Bwk.; Carter, (4). 
Distribution. 
General. Sollas (42) points out that existing Hexactinellids and 
Lithistids occur in water as shallow as 18 fath., and that the majority of 
Dictyonine Hexactinellids occur at from 100 to 150 fath. He considers 
that their distribution is influenced less by depth than constancy of 
temperature. 
Europe. Yosmaer (29) describes Velinea gracilis (g. & sp.nn.), from the 
Mediterranean; Waller, (31) Hymeniacidon forceps , sp. n., from Torbay 
England. 
Carter (6) states that Spongilla carteri is found in Central Europe, 
India, Mauritius, and the Isle of Madura, Japan ; also that Spongilla 
erinaceus , Ehrb., occurs in the Schuylkill River, N. America, as well as in 
Bohemia. 
Ridley (22) records Suberites ficus and Amphilectus edwardi, Bwk., 
from the East coast of Scotland, at 40 and 42 fath. 
Africa. Marshall (13) describes 3 new species of Spongillidce from 
Isangila, on the River Congo; Hilgendorff (10) describes Spongilla 
nitens, Carter, and Spongilla bohmii , sp. n., from River Ugalla, near Lake 
Tanganyika. Hilgendorff thinks that the specimen of S. nitens described 
by Carter from S. America more probably came from Africa. 
West Indies. Ectyon fiabelliformis and E. cylindricus , Ptilocaulis gra- 
cilisy Carter, (5). 
