36 MARINE POLYZOA. 



above ; a strong conical process on each side above ; one or two 

 long projecting spines in front, inserted below the margin. 



Dimetopia cornuta, Busk, op. cit. p. 384. t. 1. f. 7j 8. 

 Hab. Bass' Strait, 45 fathoms. 



Branches narrower than in the former species. Colour yel- 

 lowish. Tufts loose; ovicell small in proportion to the size of 

 the cells. It is placed immediately above and behind the upper 

 margin of the aperture. 



/3. Each pair arising from the pair next but one below it,, by 

 tubular prolongations. A new series of cells intercalated 

 into each branch at the bifurcation ; avicularia. 



4. NOTAMIA. 



A pair of tobacco-pipe shaped avicularia visible above each 

 pair of cells, each arising from the inferior tubular prolongation 

 of one of the cells in the pair next above. 



Epistomia, Flem. Brit. Anim. 541, 1828 ; Gray, List Brit. Rod. 



82, 147. 



Dynamena, sp. Lamx. 1816; Blainv. 1830. 

 Notamia, sp. Flem. 1828. 

 Gemicellaria, sp. Blainv. 1830. 

 Sertularia, sp. Gmelin. 

 Cellularia, sp. Pallas. 



1. NOTAMIA BURSARIA. PI. XLV. figs. 1, 2, 3, 4. 

 The only species. 



Shepherd's-purse Coralline, Ellis, CoralL4l.u. 8.t.22. f. a, A; 



Johnst. Brit. Zooph. ed. 2. 294, pi. 51, f. 1, 2. 

 Sertularia bursaria, Linn. S. N. 1314 ; Berk. Syn. i. 219. 

 Cellularia bursaria, Pall. Elench. 65 ; Ellis, Phil. Trans. Ivii. 437 



t. 19. f. 12. 

 Cellaria bursaria, Ellis fy Soland. Zooph. 25 ; Lamk. Hist. Anim. 



s. Vert. ed. 2. ii. 189. 



Dynamena bursaria, Lamx. Cor. 179; Blainv. D. S. N. Ix. 448. 

 Notamia bursaria, Flem. Brit. Anim. 54 1 ; Busk, Trans. Micros. 



Soc.ii. 110(1847). 



Gemicellaria bursaria, Blainv. Diet. S. N. Ix. 425 ; Man. Act. 461 . 

 Sertularia bursa, Turt. Brit. Faun. 216. 

 Epistomia bursaria, Gray, List Brit. Had. 82. 

 Hab. Britain (south-east). 



The true systematic position of this highly interesting species 

 seems to have been held, even as lately as 1847, in considerable 

 doubt ; for although Dr. Johnston, in the 2nd edition of Brit. 



