CELLULARIA. 241 



form. Some were like an obtuse-angled parallelepiped, apparently pro- 

 vided with a ciliated apparatus below, in front. It was difficult to attempt 

 following their history. Stationary globules have been likewise observed 

 among the parts of specimens, but numberless interceptions prevented a 

 distinct view of them. — Fig. 7. 



In early stages the product exhibits a singular formation, as may be 

 seen in various nascent specimens, which originated on each side of the 

 stem of a different zoophyte. — Fig. 8. A second long cell seems belong- 

 ing to the first, both apparently guarded by a greater number of spines 

 than peculiar to maturity. — Figs. 9, 10. 



The root is formed of forking radicles. — Fig. 11. 



Many avicularia, which are extremely minute and transparent, border 

 the different parts of this Cellularia. 



Plate XLVII. Fig. 1. Cellularia ciliaia — Ciliated Coralline. 



2. The same enlarged. 



3. Branch. 



4. The same enlarged. 



5. Branch of another specimen. 



6. Portion showing the arrangement of the cells. 



7. Corpusculum. 



8. Nascent Cellularia in different stages. 



9. Nascent Cellularia further advanced. 



10. Nascent Cellularia still farther advanced. 



11. Root. 



All the figures of this Plate, except figs. 1 and 3, are en- 

 larged. 



§ 5. Cellularia avicularis — Bird's-head Coralline — Plates XLVIII. 

 XLIX. — I refer to this subject with considerable hesitation. It has rather 

 appeared to me a different species from the Cellularia fastigiata, but the 

 point must remain open for discussion. 



Ellis, in Plate xxxviii , wishes to identify the " Bird's-head Coralline," 

 fig. 7, with a preceding species, represented by him Plate xx. fig a, A. 

 But the latter is either the fastigiata, or the subject of this paragraph ; 

 while the former, fig. 7, seems the Flustra Murrayana. 



VOL. I. 2 H 



