470 MOLLUSCA. TUNICATA. Alpidium. 



intestine spirally folded ; ovarium pedunculated Dr Leach communicated 



this species to M. Savigny, from the British shores in 1816. I have found 

 what I am inclined to consider as the same species, on the shore of the Isle 

 of May, in the Frith of Forth. 



Gen. CLI. ALPIDIUM — Individuals in a single row round 

 the common centre ; systems destitute of a central cavity, 

 and the angles of the branchial meshes without papillae. 



594. A.Jicus. — Fleshy, lobed, yellowish. 



Alcyonium pulmonis instar lobatum, Ellis, Cor. 82. t. xvii. f. 6. A. fi- 



cus, Linn. Syst. i. 1295 — ^A. ficus, Sav. Mem. 183. 

 Spreading and dividing into flattish lobes, about an inch and a half in dia- 

 meter ; of a dark olive colour ; and, when opened, emitting a very disagree- 

 able smell ; numerous granules, connected by filaments distributed through 

 the mass in the intervals of the systems. 



Gen. CLII. BOTRYLLUS. — Systems consisting of one or 

 more regular concentric rows, furnished with a central ca- 

 vity. 



* Individuals disposed in a single row^ xoHJi the central cavity 

 apparent and denticulated. 



595. B. ScJdosseri. — Lead coloured, the branchial orifices 

 white, with a circle of yellow spots. 



Alcvonium carnosum, Schlosser, Phil. Trans. 1756, 449. t. xiv. Borl. 



Corn. 254. t. xxv. f. 1, 2.— A. Schlosseri, Li7in. Syst. 1294 — B. Scli. 



Sav. Mem. 200. t. 20. f. 5.— On rocks and sea-weeds. 



Many inches in breadth, and sometimes an inch in thickness ; seniitrans- 



parent ; individuals claviform, variegated with yellow and red ; tentacular 



filaments 8, alternately short and long — M. Savigny refers to this species 



the A. Borlasii of Dr Turton's British Fauna, described by Dr Borlase, Corn. 



254. t. xxv. f. 3, 4. though it probably belongs to a ditferent genus. 



** Individuals disposed in several rows. 



596. B. conglomeratus. — Gelatinous, convex, with conglo- 

 merate finger-like divisions, and toothless terminal mouths. 



{Gaert. Pal. Spic. Zool. 16. 39. t. iv. f C.)— Alcyonium con. Turt. Brit. 



Fauna, 208 B. con. Sav. Mem. 204.— On the Cornish Coast. 



This species is still involved in considerable obscurity. The same remark 

 is applicable to Alcyonium constellatum Borl, Corn. 254. t. xxv. fi 5, 6. of Dr 

 Turton's British Fauna. 



