340 



HYDROID^. 



Part IV. 



C. pusilla Gdrt., Johnst., PI. 2. — Oceania tulmlosa Sars. — Sarsia 



tubulosa Less., Forbes, Nak. Med., PI. 6, fig. 2. — Comp. p. 201, 



note.i — Sthenyo Dig., An. Sc. Nat, 1845, Vol. IV. Pis. 14 



and 15, B. — British Channel (Gartner); Coast of Nonvay 



(Sars) ; Zetland Islands (Forbes). 

 C. mirabilis Ag., Vol. III. Pis. 17 and 18. — Sarsia mirabilis Ag., 



Mem. Am. Ac., IV. Pis. 4 and 5. — Boston Bag (Agassiz). 

 C. Rosaria A. Ag. — Gidf of Georgia (A. Agassiz).^ 

 Sarsia macrorhynchos Busch, Pi. 3, fig. 7, from Falmouth, belongs 



certainly to this genus, and, may be, to Coryne pusilla. 

 Syndictyon A. Ag. — Hydra: Coryne-like. 



S. reticulatum A. Ag. — JVahant (A. Agassiz).^ 



S. thelostylum Ag. — Oceania thelostyla Gegenh., PI. 8, fig. 9. — 



Messina (Gegenbaur). 

 Sarsia ocellata Busch, PI. 2, fig. 1, from Triest, probably belongs 



to this genus. 

 Corynitis ilt/c Cr. — Hydra : Halocharis Ag.,^ Vol. IV. jj. 239, PI. 20, 



fig. 10. 

 C. Agassizii 3fc Cr., PI. 9, fig. 2. — Charleston Harbor, Soidh Carolina 



(McCrady). 

 Candelabrum DcBl — Myriothela Sars. — Sjjadix Gosse. 



regard for science ought to lead us all to imitate 

 the entomologists, who raise the larv» of Insects 

 before naming them. 



* The European zoologists Lave described many 

 species belonging to this genus, but it now remains 

 to be seen how far they are distinct, since I have 

 shown how greatly one of the American species 

 varies at different seasons. 



^ C. Rosaria A. Ag. ; resembles the English C 

 pusilla very closely ; it has a long, light-brown pro- 

 boscis, hanging below the level of the veil, with 

 a marked constriction at the point of attachment. 

 Tentacular bulb small ; eye-speck very minute ; ten- 

 tacles moderately long, expanding about twice the 

 length of the spherosome. Height of the bell half 

 an inch, length of the proboscis three quarters of 

 an inch, diameter across the circular tube one quar- 

 ter of an inch. — Straits of Rosario, Washington 

 Territory (A. Agassiz). 



' Syndictyon A. Ag. Spherosome goblet-shaped ; 

 digestive trunk shorter than in Sarsia proper; ten- 

 tacular bulb large, with large eye-speck ; tentacles 

 hollow, sliort, the surface crowded with clusters of 

 large lasso-cells ; whole surface of spherosome 

 covered with a net-work of clusters of lasso-cells. 

 S. reticulatum A. Ag. Thickness of bell uni- 

 form, from abactinal pole to circular tube ; digestive 

 cavity with a constriction near the base, and 

 another near the actinal end ; clusters of lasso-cells 

 increasing in size towards the end of the tentacles ; 

 lasso-cells of surface of bell arranged in concentric 

 lines made \\\) of clusters of small cells parallel 

 to the circular tube, with clusters of larger lasso- 

 cells scattered irregularly ; height one eighth of an 

 inch ; of a light metallic-blue color. — Nahant, near 

 Boston, July (A. Agassiz). 



* This is the Stauridioid genus to which McCrady 

 makes a reference in his paper, p. 46 



