142 DIPHASIA. 



Cat. No. 169, Nahant, June, 1855, H. J. Clark. Hydromedusarium. 



Cat. No. 170, Nahant, September, 1854, H. J. Clark. Hydrarium. 



Cat. No. 171, Chelsea Beach, L. Agassiz. Hydrarium. 



Cat. No. 172, Cohasset, Mass., L. Agassiz. Hydrarium. 



Cat. No. 173, Nantucket, Mass., August, 1857, L. Agassiz. Hydrome- 

 dusarium. 



Cat. No. 174, Grand Manan, August, 1857, J. E. Mills. Hydromedu- 

 sarium. 



Museum Diagram No. 18, after L. Agassiz. 



Dynamena cornicina McCr. 



Dynamena cornicina McCe. Gymn. Charl. Harb., p. 102. 



Charleston, S. C. (L. Agassiz). 



Cat. No. 175, Charleston, S. C, L. Agassiz. Hydrarium. 



Cat. No. 176, Charleston, S. C, 1852, L. Agassiz. Hydrarium. 



DIPHASIA Agass. 



DipTiasia Agass. Cont. Nat. Hist. U. S., IV. p. 355. 1862. 



Diphasia fallax Agass. 



Diphasia fallax Agass. Cont. Nat. Hist. U. S., IV. p. 355. 1862. 

 Serlularia fallax JoH>fST. Brit. Zooph., p. 73, PI. 11, Figs. 2, 5, 6. 

 Sertularia fallax Stimps. Mar. Inv. Grand Manan, p. 9. 1853. 



Grand Manan (W. Stimpson) ; Massachusetts Bay. 



Cat. No. 183, Eastport, Me., 1851, L. Agassiz. 



Cat. No. 184, Eastport, Me., 1852, W. Stimpson. 



Cat. No. 185, Massachusetts Bay, L. Agassiz. 



Cat. No. 427, Eastport, Me., 1861, Anticosti Expedition. 



Cat. No. 428, Eastport, Me., 1863, A. E. Verrill. 



Diphasia rosacea Agass. 



Diphasia rosacea Agass. Cont. Nat. Hist. U. S., IV. p. 355. 1862. 



Sertularia rosacea Li>fN. Syst. 1306. 



Sertularia rosacea Johnst. Brit. Zjjoph., p. 64. 



Sertularia rosacea Pack.; in Can. Nat. & Geol., Dec. 1863. 



? Sertularia j>lumea Des. ; in Pr.pc, Best. Soc. N. H., HI. p. 66. 1848, 



•Nahant, Suisconset, Mass. (A. and L. Agassiz). 



Cat. No. 180, New Brighton, England, Oct. 1860, H. J. Clark. Hy- 

 dromedusarium. 



Cat. No. 181, Nahant, Mass., July, 1861, A. Agassiz. Hydromedusariiun. 

 Cat. No. 182, Suisconset, Mass., July, 1849, L. Agassiz. Hydromedu- 



