142 DIPHASIA. 



Cat. No. 169, Naliant, 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. 



Musemn Diagram No. 18, after L. Agassiz. 



Dynamena cornicina McCr. 



Dynamena cornicina McCr. Gymn. Chai4. 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. 



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

 Sertularia fallax JoHXST. Brit. Zooph., p. 73, PL 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 LiXN. Syst. 1306. 



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



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



? Sertularia plumea Dks. ; in Proc. Bost. Soc. N. H., III. 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. Hydromedusarium. 



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

 sarium. 



