19G TUBULARIA. 



Thamnocnidia tubularoides A. Agass. 



This species grows in clusters, which at first sight would readily be 

 mistaken for a species of true Tubularia, on account of the great diam- 

 eter of the stem, and the large size of the head. The structiu'c of the 

 proboscis, however, shows plainly that it is a genuine Thamnocnidia, 

 which can at once be distinguished from its Eastern congeners by the 

 stoutness of the stem and size of the head, suiTOunded by as many as 

 from thirty and even forty tentacles in large sjiecimens. Found grow- 

 ing profusely on the bottom of the coal-barges which bring coal from 

 Benicia to the Pacific Mail Steamship Company's steamers at San 

 Francisco. 



San Francisco, Cal. (A. Agassiz). 



Cat. No. 11, San Francisco, Cal, December, 1859, A. Agassiz. Hy- 

 dromedusariiun. 



TUBULARIA Linn. 



Tubularia Linn, (reslr. Agass.). Syst. Nat. 1756. 

 Tubularia Agass. Cont. Nat. Hist. U. S., IV. p. 342. 1862. 



Tubvilaria larynx Linn. 



Tubularia lari/nx Ellis. Cor., PI. 16, Fig. 6. 



Tulndurid larynx JonNST. Brit. Zooph., p. 50, PI. 3, Fig. 3 ; PI. 5, Figs. 3, 4. 



Tubularia larynx Stimps. Mar. Inv. Grand Manan, p. 9. 1853. 



Grand Manan (W. Stimpson). 



Tubularia Couthouyi Agass. 



Tubularia Cnuthntiyi Agass. Cont. Nat. Hist. U. S., IV. pp. 266, 342, PI. 23*, Figs. 8, 9 ; Pis. 



24, 26, Figs. 1-6. 1862. 

 Tubularia iiuJivisa Stimps. Mar. Inv. Grand Manan, p. 9. 1853. 

 Tubularia inJivisa Gould. Kep. Inv. Mass., p. 330. 1841. 

 Tubularia indiuisa MoRCH ; in Besk. af Gronland, p. 96. 1857. 



Massachusetts Bay (L. Agassiz). 



Cat. No. 4, Boston, August, 1851, H. J. Clark. Hydromedusarium. 

 Cat. No. 5, Grand Manan, 1857, J. E. Mills. Hydromedusarium. 

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



