170 



RHIZOGETON. 



RHIZOGETON Agass. 



Rhizogeton Agass. Cont. Nat. Hist. U. S., IV. p. 347. 1862. 



Rhizogeton fusiformis Agass. 



Rhizogeton fasiformis Agass. Cont. Nat. Hist. U. S., IV. pp. 224, 347, PL 20, Figs. 17-23. 1862. 



Massachusetts Bay (Agassiz). 



Cat. No. 52, Nahant, Mass., July, 1861, A. Agassiz. Hydrarium. 



CLAVA Gmelin. 



Gmelin ; in Beschaft. d. Berlin. Ges. Naturf. Freunde. 1775. 



Clava leptostyla Agass. 



Claim leptostyla Agass. Cont. Nat. Hist. U. S., IV. pp. 218, 222, 

 Fig. 32 ; 338, PI. 20, Figs. 11 - 16^ PI. 21. 1862. 



Clavn mullicornis Stimps. Mar. Inv. Grand Manan, p. 11. 18.53. 



Clava multicornk Leidy. Mar. Inv. Rhode Island and New Jersey, 

 p. 3, PI. XI. Figs. 33, 34. 185.5. 



Clava multicornis Pack. ; in Can. Nat. & Geol. Dec. 1863. 



The Clava leptostyla (Fig. 274) seems to differ 

 from the C multicornis by the greater number of 

 its tentacles. 



Point Judith (Leidy) ; Massachusetts Bay (Ag- 

 assiz). 



Cat. No. 51, Kingston, Mass., July, 1851, H. J. 

 Clark. 



Cat. No. 451, Nahant, Mass., A. Agassiz. Hydro- 

 medusarium. 



Museum Diagram, No. 24, after L. Agassiz. 



Fig. 274. Clava leptostyla ; greatly magnified. 



