198 A Catalogue of the 



C. cry BtallinSi, Wyv. Thomson. P.Z.Y., 24. 

 C. utriculns, i/'^. P.Z.Y., 89; H.W. 



0. umbonata, Busk. B.M.C., Part I.,p. 11 ; P.Z.V.,90; C.P., p. 13. 

 0. delicatula, J.5.TF. 5^;. P.Z.V., 107; J.B.W. 

 (= Catenicellopsisdelicatula). 



c. Garmatce. 

 C. carinata, Busk. B.M.C., Part I., p. 12 ; P.Z.y., 21 

 Claviporella, M'G. 



Branches springing usually from the summits of the zooecia of a 

 geminate pair, but occasionally from the sides of single zooecia. 

 Zcoecia single or geminate ; usually a large lateral process on each 

 side above, supporting a large, gaping avicularium, occasionally 

 small, altered, or aborted ; mouth narrow, arched above, contracted 

 below, and extending downwards as a deep notch, giving the whole 

 a key-hole appearance ; usually several blunt, hollow processes 

 above and to the sides of the mouth. 

 0. aurita, Busk sp. B.M.C., Part I., p. 8 ; P.Z.V., 2L 



0. imperforata, M^G. T.R.S.V., July, 1886. 

 0. pulchra, M'G. T.R.S.V., July, 1886. 



Port Phillip Heads, J.B.W. 

 C. geminata, Wyv. Thomson sp. P.Z.V., 24. 



Catenicellopsis, J. B. Wilson. 

 Zoarium forming (usually) dichotomously divided, uniserial 

 branches. Zocecia arising from the upper and back part or from 

 the sides of other zocecia ; those at a bifurcation geminate and 

 giving rise to two other branches, or a single zooecium giving rise 

 to the first of a series from its side ; mouth straight and entire 

 below, arched above, having a stout lateral process on each side, 

 with a small avicularium at the base externally and one or more 

 hollow, blunt processes superiorly. Ocecium immersed in the upper- 

 most zooecium of a triplet. 



O.pusilla, J.i5.TF. P.Z.y., 107. 



Calpidium, Busk. 



Each internode consisting of a single zooecium, or of a median 

 primary zooecium and a lateral zooecium, on one or both sides, united 

 side to side with it ; mouth contracted about the junction of the 

 middle with the lower third, its upper margin very prominent and 

 forming a hooded projection. An avicularium on each upper angle 

 of an internode. 



C. ponderosum, Goldstein, sp. P.Z.Y., 107. 

 0. ornatum, Busk. B.M.C., Part I., p. 15 ; P.Z.V., 108. 



Family. Calwelliid^. 



Zoarium phytoid, erect, continuous. Zocecia in pairs joined back 

 to back, those of each pair connected by tubes with those of the 



