i 



General History of the Marine Polyzoa. 199 



Stolonella clausa may safely be pronounced one of the 

 loveliest of Polyzoa. 



Family CellariidaB. 



Farcimia, Pourtales. 



Gen. char. — Zoarium calcareous, erect, branching ; stem 

 and branches composed of segments united by corneous 

 joints. Zocecia arranged in series round an imaginary axis 

 with elevated margins and a depressed area, which is more or 

 less covered in with membrane. 



The genus, instituted by Pourtales and adopted by Smitt*, 

 includes forms with a Cellarian habit and a Membraniporidan 

 cell. The type species is the Farcimia cereus of Pourtales. 



Farcimia appendiculata, n. sp. (PI. VII. fig. 4.) 



Zoarium erect, dichotomously branched, internodes of mode- 

 rate length (usually containing four cells on each face), narrowed 

 at the base, joints composed of two corneous tubes. Zocecia 

 arranged in four series, alternate, arched above, subtruncate 

 below, expanded at the sides, margin raised and thin ; the 

 whole aperture covered by a transparent membrane, except a 

 small portion at the base, which is closed in by a rather stouter 

 material. On each side, just below the top, an avicularium, 

 occupying the space between the raised margins o( the conti- 

 guous cells, elongate, subimmersed, tapering off below, 

 stretching obliquely downwards, the upperside occupied by a 

 slightly depressed area, covered in by membrane, at the top 

 the beak and mandible, the former small, very slightly 

 bent at the tip, mandible bluntly triangular, directed out- 

 wards — the avicularia of the neighbouring rows forming a 

 line between the cells ; commonly the membranous covering of 

 the avicularian area extended into an erect process, broad at 

 the base and running out into a sharp point above (PL VII. 

 fig. 4 b). Ooscium terminal, rounded, immersed. 



Loc. Port Phillip Heads (J. Bracebridge Wilson) . 



The avicularia are the striking feature of this species. In 



structure they seem to resembl 



genus Scrupocellaria. They are remarkable for their size j 

 and from the alternate disposition of the cells they fall into 

 regular longitudinal rows, intercalated between the series of 

 zocecia. The membranous appendages are present in large 

 numbers ; but the examination of dead specimens merely does 

 not afford the means of determining their function. 



o 



* < Floiidan Bryozoa/ part ii. p. i 





