HALECIUM. 147 



Cat, No. 426, Eastport, Me., 1863, A. E. Verrill. 



Cat. No. 434, Mingan Islands, 1861, Anticosti Expedition. 



Cotulina tamarisca A. AGASS. 



Scrtularia tamarisca LINN. Syst. 1307. 



Sertularia tamarisca JOHNST. Brit. Zooph., p. 74, PI. XIII. Figs. 2-4. 



Eastport, Me. (A. E. Verrill ; Sea-Coal Bay, N. S. (Anticosti Expedi- 

 tion) ; Massachusetts Bay (Agassiz). 



Cat. No. 231, Grand Manan, W. Stimpson. Hydrarium. 

 Cat. No. 232, Massachusetts Bay, W. Stimpson. Hydrarium. 

 Cat. No. 425, Eastport, Me., 1863, A. E. Verrill. 

 Cat. No. 431, Sea-Coal Bay, N. S., 1861, Anticosti Expedition. 



Cotulina Greenei A. AGASS. 



Sertularia tricuspidata MURRAY (orc Alder). Ann. & Mag., V. p. 200. 1860. 

 Sertularia Greenei MURRAY. Ann. & Mag., V. p. 504. 1860. 



Growing in very thick clusters, resembling somewhat in their ap- 

 pearance fine brushes of Dynamena pumila. It is supported by a very 

 slender stem, which branches near the base ; the branches rise verti- 

 cally, forming fan-shaped tufts, in which all the stems reach one level ; 

 there is no prominent main stem. It attains a height of from two to 

 three inches. The secondary branches arise in a similar way, near the 

 base of the primary branches. The sterile hydne have two prominent 

 exterior points to support the operculum, and two smaller ones near 

 the stem. The reproductive calycles are conical and slightly corru- 

 gated, attached by the apex, and terminate in a bottle-shaped neck. 



San Francisco, Cal. 



Cat. No. 436, San Francisco, Cal., Normal School, Salem. 



HALECIUM OKEN. 



Halecium OKEN. Lehrb. der Naturg. 1815. 



Thoa LAMX. Pol. Cor. Flex. 1816. 



Halecium AGASS. Cont. Nat. Hist. U. S., IV. p. 357. 1862. 



Halecium muricatum JOHNST. 



Haled am muricatum Jonxsx. Brit. Zooph., p. 40, PI. IX. Figs. 3, 4. 

 Sertularia muricata ELLIS & SOL. Zooph., p. 59, PL VII. Figs. 3, 4. 



Cat, No. 421, Eastport, Me., 1863, A. E. Verrill. 



