180 CATENICELLIDZ. 
FAMILY—CATENICELLID. 
Zoarium divided into distinct internodes by flexible joints, internodes 
formed by a single series of cells. 
Genus, CATENICELLA—Blainville. 
Cells arising from the upper and back part of the lower one by a 
short corneous tube, all facing the same way, and forming dichotomously 
divided branches of an erect phytoid zoarium ; cell at each bifurcation 
geminate ; each cell with two lateral processes usually supporting an 
avicularium ; ovicells either sub-globose and terminal, or galeriform, and 
placed below the opering of a cell in front. 
This is altogether a southern genus. 
(a.) Fenestratee. 
Cells fenestrate in front ; ovicells terminal. 
C. ventricosa, Busk, Cat. Pol. Brit. Mus.,p.7. Cells oval, com- 
pressed ; avicularia wide, sometimes supporting a cup-like cavity, some- 
times a closed broad conical spine, fenestrae seven, with fissures radiating 
towards a rounded central pore; front of cell studded with minute 
acuminate papille; back smooth, sometimes spotted. Dirty white; 
3 or 4 inches long. 
Lyall Bay. Bass Straits, 45 fathoms. 
C. hastata, Busk, 1c, p. 7; C. bicuspis, Gray, Dic IND 
(P22935) Cells oval; fenestra seven to nine, disposed in a ee 
with fissures radiating towards the median line ; avicularia supporting 
large, pyramidal, pointed, hollow processes, compressed and perforated 
before and behind by five or six small circular pores. Yellowish-white 
or reddish ; 3 or 4 inches long. 
Lyall Bay. Bass Straits, 45 fathoms. 
C. aurita, Busk, Zc, p. 8. Cells oval or sub-globose ; avicularia 
large and strong, two blunt processes, the upper the longer, on each side 
of the opening in front ; fenestrae five, around a central one. 
Cook Strait (Lyall). Campbell’s Island. Bass’s Strait. 
C. cribraria, Busk, Zc, ~. 9. Cells sub-globular, compressed, 
more or less alate; avicularia large, without any superior appendage, 
and prolonged downwards into elevated lateral ale ; fenestrae numerous, 
small, round, equidistant, the outside ones larger; a minute central 
pore. 
Lyall Bay. Bass Straits, 45 fathoms. 
C. margaritacea, 4usk, Zc, ~.9. Cells oval or sub-globular, 
much compressed ; avicularia short and broad, supporting a deep, cup- 
like cavity ; fenestre five, large, with fissures radiating upwards ; lower 
margin of aperture notched in the middle; back of the cell minutely 
sulcate ; sulci short, interrupted, irregular. 
Lyall’s Bay. Swan Island. Australia. 
