APPENDIX. 373 



1. E. crystallina. Gray, 1. c. 



Cells in pairs; three spines on the outer edge, the 

 central usually the longest and strongest. 



Hab. — Bass Strait, 45 fathoms. 



Parasitic upon Polyzoa, &c. circinate branched — 

 branches irregular divaricate. The opening of the cell 

 triangular, very obliquely placed. 



2. Emma tricellata, n. sp. 



Cells in triplets ; three or four long spines on the upper 

 and outer part ; a small spine on the inner and lower part 

 of the edge of the opening. 



Hab. — Bass Strait. 



Parasitic upon Catenicella, &c. Habit long straggling, 

 very Hke the preceding species. The cells are more in- 

 fundibuliform, and the avicularium, which, as in E. crys- 

 tallina is not always present, is larger, but occupies the 

 same position on the cell. 



2. Polyzoary continuous throughout. 



Fam. 3. BICELLAEIAD^. Frond wholly divided into 

 narrow Ugulate, dichotomous, bi or multiserial branches ; 

 no vibracula. Avicularia when present pedunculate. 



14. BicELLABiA, BlainviUe. 



Char. (B.) Cells turbinate, distant. Opening directed 

 more or less upwards. Mouth submarginal. Several 

 curved spines, marginal or submarginal. 



1. B. tuba, n. sp. 



Opening round, looking nearly directly upwards; a 

 digitiform hoUow process below the outer border supporting 

 2 — 4 long incurved spines ; 2 — 3 other long curved sub- 

 marginal spines behind or above the opening, none below 

 it in front — a solitary spine on the back a short way down 

 the ceU. Avicvdaria very long, trumpet-shaped, arising 

 on the back of the cell. 



Digitized by Microsoft® 



