HYDROZOA. 
467 
18. MoNOCAULiDiR. Ilytli’ocaiilus solitary, nalrfed; liydraiiths with a 
proximal and a distal set of filiform tentacles ; gonophores fixed sporosacs. 
Monocnulus glacinlis, Sars, Varangerfjord, Ag., Massachusetts. 
10. TuBULARiiDiE. Ilydrocaulus developed, invested with a chitinoua 
perisarc ,* hydrantli with a proximal and a distal set of verticillate filiform 
tentacles ; gonophores in the form of fixed sporosacs. 
Tubularia (a) indivisa, L., North seas, coiithouyi, Ag., Massachusetts, re- 
galis, Boeck, Spitzbergen, insignis, sp. n., Alim., Dieppe; (h) {Thamnocnidia, 
Ag.) larynx, Sol., Ell., Britain, Scandinavia, and Belgian shores, hellis, Alim., 
Shetland, attenuata, Alim., Shetland and Frith of Forth, simplex. Aid., 
Northumberland, hmnilis, Alim., Ireland, calamaris. Van Ben., Belgium, poly- 
carpa, sp. n., Alim., Coquimbo, spectahilis and tenella, Ag., Massachusetts, 
pacijica, Alim. (=Z7i. tuhular aides, Ag.); (c) {Parypha) crocea, Ag., Boston, 
cristata, M^Cr., South Carolina, mesemhryantliemmn, sp. n., Alim., Spezzia, 
? aspera, sp. n., Alim., Coquimbo. 
20. Hybocodonidae. Ilydrocaulus developed, invested by a cbitinous pe- 
risarc ; liydranths with a proximal and a distal sot of filiform tentacles ; 
gonophores modusiform planoblasts. 
Ilyhocodon prolifer, Ag., Massachusetts. 
Petopleura dumortieri, Van Ben., Ostend, Man. 
21. IlYDROLARiDiE. Ilydrocaulus undeveloped ; hydranths with but 2 
tentacles, which are filiform and spring from one side of the base of the 
hypostome; mouth with 2 lip-like lobes; gonophores medusiform piano- 
blasts, with C simple radiating canals and simple marginal tentacles. 
Lar sabellarmn, Gosse, Devonshire (c/. Ilincks, 6). 
JEudendriiim ramosum, capillare, humile, and vaginatum, Hydractinia ecTii- 
nata, Podocoryne carnea, Cladonema radiatum, Stauridium productum, Clara- 
tella prolifera, Corymorpha nutans, Tubularia indivisa, larynx, attenuata, 
huniilis, and bellis are figured, 
Staurocoryne, g. n.. Botch (14). Stem simple, rooted b}’' a creeping fili- 
form stolon, the whole invested by a polypary. Polypites terminal, clavate, 
with several (3) verticils of (4) capitate tentacula disposed in the form of a 
cross.’’ Differs from Coryne in its mode of growth, closely resembling that 
of Cladonema, and the cross-like disposition of the tentacula (as in Stau- 
ridium). Reproduction unknown. S. wortleyi, sp. n., in aquaria. 
Cladonema radiatum, Duj. An early stage of the planoblast described and 
figured by Ilincks (7, p. 891, pi. 21. fig. 0), with observations on its economy. 
The same author (7, p. 393) asserts the generic identity of Zanclea, Ge- 
genb., and Gemmaria, M^Crady, and regards the branched variety of the 
trophosome as not specifically different from the low, unbranched variety 
figured by Allman. 
Calyptoblastea. 
Schizocladium, Alim., is rejected by Ilincks (7, p. 390), who observed the 
same reproduction by spontaneous fission in Campamdaria neglecta (pi. 20. 
fig. 4), and believes it to be far from uncommon among the Ilydroida. All- 
man’s type species is probably an Obelia. 
Laomedea gclathwsa. Hell., is probably Campamdaria Jlcxuosa, IlJis, ; C. 
