540 ZOOPHYTA. CELLARIAD^. Tuicellaria. 



153. C. rcptans. — Cells inversely conical, rounded, project- 

 ing, with short spinous processes at the top. 



Creeping Coralline, Ellis, Cor. 37- t. xx. f. 3.— Sertularia rep. Linn. Syst. 

 Syst. i. 1315. — C. rep. Pall. El. 73.— Crisia rep. Lamour. Cor. Flex. 

 140 — Common on submarine bodies, especially L Flustra foliacea. 

 Height upwards of an inch, creeping, dichotomously divided, branches di- 

 verging, jointed, with frequent connecting tubular radicles ; the extreme 

 branches free ; the lateral projecting summits of the cells have from one to 

 four short spines. 



154. C. ciliata. — Cells remote, funnel-shaped, diverging, the 

 summit with long hairs. 



Ciliated Coralline, Ellis, Cor, 38. t. xx. f. 5. — Sertularia cil. Linn. Svst. 

 i. 131G— C. cil. Pall. El. 74.— Crisia cil. Lamour. Cor. Flex. 130.— 

 On corallines and fuci, common. 



Height seldom an inch, dichotomously branched, loose ; cells projecting on 

 the sides of the branches, mouths oblique, spines unequal. 



Gen. LVIII. TRICELLARIA.— Cells ternate, with a joint 

 above and below ; mouths ovate, with sessile margins. 



155. T. ternata. — Cells lengthened, rounded at top, with 



spinous processes. 



Cellaria ternata, Sol. Ell. Zooph. 30. — Crisia tern. Lamour. Cor. Flex. 

 1 42. — Scottish coast. 



Height scarcely an inch, dichotomously branched ; the cells enlarge gra- 

 dually in breadth towards the top, which is armed with two or three spines ; 

 when the outermost one is short, the cell externally has an angulated ap- 

 pearance ; at the joints the stem is narrow. This species was sent to Mr 

 Ellis from Aberdeen by Dr Skene. My specimens were found in Zetland. 



Gen. LIX. CRISIA. — Cells in two rows; the mouths tu- 

 bular, with produced margins. 



156. C. eburnea. — Cells loosely aggregated, cylindrical, bent, 

 tubular orifices free. 



Tufted Ivory Coralline, Ellis, Cor. 30. t. xxi. f. 6. — Sertularia eb. Linn. 

 Syst. Nat. i. 1316 — Cellularia eb. Pall. El. 75. — Crisia eb. Lamour. 

 Cor. Flex. 158 — On marine plants about low water-mark. 

 Height about half an inch, dichotomously branched, jointed ; surface ha- 

 ving a frosted appearance ; cells narrow, long, and bent outwardly, placing 

 the mouths far asunder ; ovarium an enlarged cell. 



157. C. luxata. — Cells closely aggregated, cylindrical, nearly 

 straight, with short tubular orifices ; joints black. 



On corallines, not rare, from various parts of the coast. 



Height scarcely an inch, of a firmer substance than the preceding, with 

 which it has probably been confounded, though differing in the following par- 

 ticulars : the branches are broader and thicker in the middle, the cells are 

 shorter and more closely connected, the orifices are less tubular and elevated, 



