Dr. Johnston's Catalogue of Zoophytes. 257 



Hab. Common on all our shores. 



About four inches high, stout, rigid. The polype-cells, in many specimens, are, at least, 

 sub-alternate. 



3. S. filicula, stem compound, slender, zig-zag, pinnate ; pinnae regularly alternate, patent, 



bifarious ; cells opposite, bellied, with a very short narrow neck, and entire mouth. 

 Fern Coralline. 

 S. filicula, Soland. Zooph. 57, t. 6, f. c ; Turt. Lin. iv. 681 ; Turt. Brit. Faun. 215 ; Stew. 

 Elem.ii. 445; Lam. Hist. Nat. ii. 119; Larnour. Corall. 82; Bosc, Vers, iii. 114; 

 Hogg's Stockton, 32. 

 Dynamena filicula, Flem. Brit. Anim. 544. 



Hab. Parasitical on sea-weeds, particularly on the entangled roots of Laminaria digitata, 

 common. 



Our largest specimen is nearly four inches in height. It is " one of the most delicate 

 species of our English vesicular Corallines," and, notwithstanding the similarity of their 

 specific characters, is very distinct from the preceding. 



4. S. pumila, stem simple, or bifariously branched ; branches few and irregular ; cells op- 



posite, the aperture recurved, obtusely two-lipped, truncate. Sea- Oak Coralline. 

 S. pumila, Linn. ; Soland. Zooph. 40 ; Turt. Lin. iv. 676 ; Turt. Br. Faun. 212 ; Stew. 

 Elem. ii. 441, t. 12, f. 10, 11, copied from Ellis ; Lam. Hist. Nat. ii. 119 ; Bosc, Vers, 

 iii. 105 ; Hogg's Stockton, 32 ; Stark, Elem. ii. 449, t. viii. f. 14, copied from Ellis. 

 Dynamena pumila, Larnour. Corall. 79 ; Flem. Br. Anim. 544. 

 Corallina pumila repens, Raii, Syn. 37, No. 19. 

 Sea-Oak Coralline, Ellis, Corall. 9, t. v. No. 8, f. a ; Phil. Trans, xlviii. 632, tab. xxiii. 



No. 6. 

 Hab. On the fronds of Fucus vesiculosus et serratus ; also on slaty rocks near low water- 

 mark, common. 



The shoots are rarely more than half an inch in height, numerous, and connected at the 

 base by a slender tubular thread, which creeps along the surface of the fucus, and adheres 

 to it rather firmly. These fibres never bear any polypes. The ovarian vesicles are large, 

 pear-shaped, swollen. 



5. S. ntgosa, stem erect or creeping, simple or slightly branched ; branches irregular ; cells 



alternate, oval, coarsely wrinkled across, the orifice narrow and puckered. Snail-tre- 

 foil Coralline (tab. nost. xi. fig. 3). 



S. rugosa, Linn. ; Soland, Zooph. 52 ; Turt. Lin. iv. 678 ; Turt. Br. Faun. 213 ; Stew. 

 Elem, ii. 442; Lam. Hist Nat. ii. 121; Bosc, Vers, iii. 108; Hogg's Stockton, 32; 

 Flem. Br. Anim. 542. 



Clytia rugosa, Larnour. Corall. 89. 



Snail-trefoil Coralline, Ellis, Corall. 26, No. 23, 1. 15, f. «. 



Hab. Parasitical on Flustroe, Sponges, and Fuci. 



A small species (from a half to an inch high;, well distinguished by its strongly-wrinkled 

 cells, which greatly resemble a barrel, in miniature. 



