LucERtfARiA. RADIATA. ACALEPHA. 499 



inches, the body consists of two cylindrical portions, of different dimensions, 

 smooth, pellucid, yellowish ; a few longitudinal white streaks under the skin ; 

 oral disc not expanded, surrounded with about 18 filiform tentacula in two 

 alternate rows. 



47. " A. anemonoides. — Nearly cylindrical, rather short, red ; 

 interior tentacula ramified, outer ones conic, obtuse. 



" Rocky coasts, Shaw, Nat. Misc. t. xxvi. 27- 

 " Body with a triple concentric row of tentacula, of a yellow colour, varied 

 with red ; stomach pale yellov, with red and pale sea-green stripes." — Turt. 

 Brit. Fauna, 131. 



48. " A. caryophyllus. — Red-brown, with small pencil-form- 

 ed tentacula. 



" Martin's Marine Worms, i. 1. t. i. f. 1."— Turt. Brit. Fauna, 131. 



Gen. XVII. MAMMARIA.— Body smooth, mouth termi- 

 nal, without tentacula. 



49. M. mamilla. — Conical, ventricose, and white. 



Mull. Prod. Zool. Dan. 224. Jameson, Wern. Mem. i. 557.— On fuci, 

 Leith shore, Professor Jameson ; Belfast, Mr Templeton. 



Gen. XVIII. LUCERN ARIA.— Body narrow towards the 

 adhering extremity, expanding into an oral disc which is 

 divided into lobes bearing the tentacula. 



50. L. auricula. — Peduncle of the body short, tufts of ten- 

 tacula equidistant, with one intervening oval vesicle. 



Fab. Fauna Groen. 341. Midi. Zool. Dan. t. clii. Mont. Linn. Trans. 



ix. 113. t. vii. f. 5. Lamouroux, Mem. No. iii. — Adheres to fuci, near 



low-water mark, on different parts of the coast. 



Body brownish, the portion next the adhering extremity cylindrical, short, 



terminating in a bell-shaped, wide, concave, oral disc, divided into eight 



lobes, each terminating in a tuft of short clavate tentacula. 



51. L. J'ascicularis. — Peduncle of the body produced ; tuft 

 of tentacula in pairs, about a hundred in each, 



Flem. Wern. Mem. ii. 248. t. xviii. f. 1, 2. Lamouroax, Mem. No. i — 

 On the broad leaves of fuci, Zetland. 

 Colour dark brown ; peduncle cylindrical, flexuous, wrinkled, with a nar- 

 row base ; body bell-shaped, subquadrangular, concave ; margin divided into 

 four pairs of arms, concave within ; mouth central, tubular, consisting of a 

 loose membrane, four notched at the tip, and also expanded circular or striat- 

 ed at the pleasure of the animal, the inside with numerous white filaments. 



ii2 



