HALECIUM. 147 



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



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



Cotulina tamarisca A. Agass. 



Sertularia tamarisca Liisns". Syst. 1307. 



Sertularia tamarisca Johnst. Brit. Zooph., p. 74, PI. XTTT. 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. Hydrarimn. 

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

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



Cotulina Greenei A. Agass. 



Sertularia tricuspidata Murray (non Alder). Ann. & Mag., V. p. 200. 1860. 

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



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

 jaearance fine brushes of Dynamena jminila. 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 hydraB have two prominent 

 exterior points to support the opercidum, 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. 



Haleciura rauricatum Johnst. 



Halecium muricatum JonxsT. Brit. Zooph., p. 40, PI. IX. Figs. 3, 4. 

 Sertularia muricata Ellis & Sol. Zooph., p. 59, PI. VII. Figs. 3, 4. 



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



