IIYDItOZOA. 
405 
Corynitis agassizi, M^Cr. {Halocharis spiralis^ Ag,), South Carolina. 
Gymnocoryne coronata, Ilincks, Devonshire. 
Gemmaria implexa, Aid., British shores. 
6. DicoRYNiDiE. Ilydrocaulus developed, invested with a perisarc ; hy- 
dranths with verticillate filiform tentacles j gonophores in the form of nata- 
tory ciliated sporosacs, with 2 simple ciliated basal tentacles. 
Dicoryne conferta, Aid., North British shores. 
6. BiMEHiiDiE. Hydrocaulus developed, and invested with a perisarc, or 
rudimentalj hydranths with the hypostome not abruptly differentiated j ten- 
tacles filiform, in a verticil round the base of the hypostome j gonophores fixed 
sporosacs. 
Garveia'nutans, Wr. (Corytham7iion, AWm.), Frith of Forth, Lancashire. 
Bimeria vestita,AVi\ (Mamcella fusca, Alim.), British shores. 
Wrightia (g. n.j—AU'actylis, Wright, pt.) m'enosa, Aid., British shores. 
Ilydrmithea inai'garica, Hincks, Ilfracombe. 
Stylactisjsarsi, Alim,, Norway, fucicola, Sars, Messina, mermis, Alim., 
Nice. 
Jldcrocordylc conyhearii, Alim., Cork, Oban. 
Cionistes l eticidata, Wr., Frith of Forth. 
7. BouGAiNvini.iiDiE. Ilydrocaulus more or less developed, invested by a 
conspicuous perisarc ; hydranths with the hypostome not abruptly differen- 
tiated ; tentacles filiform, in a single circlet round the base of the hypostome j 
gonophores phanerocodonic, with 4 simple radiating canals, and the marginal 
tentacles simple and distributed either singly or in clusters. 
Bougainvillia ramosa^ Van Ben., Belgium, British shores, /re<^/coscr, Alim., 
British shores, superciliaris, Ag., North America, carolinensisj M^Cr., North 
Carolina, Massachusetts, inuscus, Alim., Torquay, ? 77iartensi, Ag., North 
Pacific, ? pimlla, Sars, Messina. 
IHplura fritillarin, Stp., Iceland. 
Berigonimus nmscoides, S.ars, Norway, Wr., British shores, inimdns, 
Alim., Shetland, scssilis and palliatns, Wr., and vestiius, Alim, j Frith of Forth, 
sej'pens, Alim., Torbay, linearis, Aid., Northumberland, P hitentacidata, Wr. 
quadritentacidata, Frith of Forth. 
8. Eudendbudje. Ilydrocaulus developed, invested with a perisarc; 
hydranths with the hypostome abruptly differentiated from the body, and 
with a single set of verticillate filiform tentacles ; gonophores fixed sporosacs. 
JEudendf'itmi ramosnm, L., British shores, 7'ameiim, Pall., Norway, British 
shores, Mediterranean, capillar c, Aid., British shores, arhusada, Wr., Frith 
of Forth, msigne, Hincks, British shores, dispar, Ag., Massachusetts, annu- 
latum. Norm., Shetland, vagmatmn, Alim,, Shetland, tenne, Ag., Massachu- 
setts, racemosum, Cavol., Naples, ? cingulatum, Stm., Grand Manan. 
9. Hydbactiniid.®. Hydrophyton forming a continuous adherent expan- 
sion, its deeper parts consisting of freely intercommunicating tubes of coeno- 
sarc, each invested by a chitinous perisarc, and all adnate to one another by 
their sides, its free surface overspread by a layer of naked ccenosarc ; hy- 
dranths with filiform verticillate tentacles ; gonophores in the form of fixed 
sporosacs. 
Hydractinia ccliinata, Flem., British shores, Belgium, France, polyclvna, 
Ag., Nprth America. 
