378 APPENDIX. 



nishes as the branch ascends^ each terminating in a 

 vibracnliim. 



2. C. zelanica, Busk. 



Selhia zelanica, Gray. Dieffenbach^s New Zealand, 

 Vol. ii. p. 292. 



Crista Boryi, Audouin. (Savigny, Egypt, pi. 12, 

 fig. 4.) 



Biserial; opening of cell oval or elliptical, rounded at 

 each end, crossed in front, and thus di^dded into two 

 nearly equal parts by a transverse calcareous band, from 

 the lower edge of which depends a pedunculate, falciform 

 operculum. Cells frequently produced upwards into a 

 large arcuate ovicell. Vibracula ovoid, setse long, ser- 

 rated. 



Hab. — Off Cumberland Islands, 27 fathoms, fine grey 

 mud. 



Slender : sufficiently distinguished by the pecuHar form 

 of the operculum. This part is so indistinctly represented 

 in Savigny's figures, as to render it impossible to deter- 

 mine with certainty whether his species is the present one 

 or not. The posterior view is much more like, but that is 

 insufficient of itself to afford a specific character. The 

 back of the branches exactly resembles an ear of barley. 

 This species occui^s in New Zealand, and also in South 

 Africa. 



b. Inoperculatse ; opening of cell without an oper- 

 culum. 



3. C, lata, n. sp ? 



C. dicliotoma?, Lamouroux. 



Branches 4 — 7 serial ; opening of cells in central rows, 

 oval, sometimes square below; and the cell frequently 

 produced into a shallow arcuate ca^dty. A short blunt 

 spine on each side of the mouth. Marginal cells shallow, 

 opening oval, margin much thickened, granulated : usually 

 a short conical spine at the summit ; a very minute sessile 



