378 APPENDIX. 



nishes as the branch ascends, each terminating in a 

 vibraculum. 



2. C zelanica, Busk. 



Selbia zelanica, Gray. Dieffenbach's New Zealand, 

 Vol. ii. p. 292, 



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

 fig. 4.) 



Biserial; openiag of cell oval or elliptical, rounded at 

 each end, crossed in front, and thus divided 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 oviceU. Vibracula ovoid, setse long, ser- 

 rated. 



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

 mud. 



Slender : sufficiently distinguished by the peculiar form 

 of the operculum. This part is so indistiuctly 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 occurs in New Zealand, and also iu South 

 Africa. 



h. Inoperculatse ; openiag of cell without an oper- 

 culum. 



3. C. lata, n. sp ? 



C. dichotoma? , Lamoiirous. 



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

 oval, sometimes square below; and the ceU frequently 

 produced into a shallow arcuate cavity. 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 



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