SYNCORYNE RETICULATA. 283 



9. Stncortne ferox, Slrethill JVrifjht. 



CoRYYNE FEROX, — StrethUl U'riffht, in Proc. Roy. Pln'sical Soc. Ediii. for Feb., 18G3. 

 Hincks, Brit. Hydr. Zoopli., p. 319. 



TROPHOSOME.- — Htdrocaulus " single, smooth." Htdranths with the " ten- 

 tacles thick, short, having the capitate cluster of thread-cells scarcely larger than the 

 width of the tentacle." 



GONOSOME. — Medus.e " developed heneath the tentacles, similar to those of 

 Corijne decqjiens." 



I know nothing of this species except from Dr. Wright's description, which is chiefly occu- 

 pied by a comparison of it with the Sj/ncori/iie deci^nens of Dujardin, a hydroid which he informs 

 us *S'y/?co/y/«'/e?-o.r "resembles in the shape and mode of development of the medusoids ;" but 

 from which it differs in its " more robust and clumsy habit." He notices also the existence on 

 the hydrantli itself of a delicate perisarcal investment (" coletoderm" of Wright), which "passes 

 over the whole body and tentacles," causing the liydranth " to assume a dirty appearance, as it 

 often seems to support a downy growth of very minute algae." 



It is probably a Firth of Forth species, though Dr. Wright makes no mention of either its 

 habitat or locality. 



*^* 10. Syncortne reticulata, Alex. Agassiz. 



Syndictign reticulatum, — Alex. Agassiz, in Agas. Contr. Nat. Hist. U.S., vol. iv, p. 34, 



and in Illustr. Catal., North American Acad., 

 p. 177, figs. 290 — 297. 



TROPHOSOME.— HiTDROCAiiLiTS simple, or very sparingly branched, slender, not 

 more than one tenth of an inch in height. Htdranths large ; tentacles short, eight 

 or ten in number. 



GONOSOME. — Planoblasts developed from among the tentacles on the lower 

 part of the body of the hydranth ; umbrella of nearly uniform thickness throughout, 

 with the transverse and vertical diameters nearly equal, and having its surface covered 

 with large scattered thread-cells, between which long, narrow, superficial cells are so 

 disposed as to give it a reticulated appearance ; velum well developed ; length of 

 manubrium somewhat exceeding half the height of the umbrella cavity ; marginal 



37 



