498 RADIATA. ACALEPHA. Actinea. 
42. A senilis . — Body rough, with numerous rows of glandu- 
lar warts, tentacula shorter than the body. 
Hydra disciflora, tentaculis retractilibus subdiaphanis ; corpora cylin- 
drico, miliaribus glandulis longitudinaliter striato, Gaert. Phil. Trans. 
17C1, 82. t. i. f. 4 — A. senilis, Linn. Syst. i. 1088. Dicq. PhU. Trans. 
1773, 866. t. xvi. f. 10 — A. verrucosa, Penn. Brit. Zool. iv. 49. — A. 
crassicornis, Adams, Linn. Trans, hi. 252.— A. equina, Sower. Brit. 
Misc. t. 4. — A. gemmacea, equina and crassicornis, Turt. Brit. Fauna, 
130, 131.. — A. crassicornis, Stewart's £1. i. 393 — In crevices of rocks 
and sand, common. 
Body reddish, the tips of the glands pale, the glands themselves are dis- 
pc»sed in vertical and transverse rows, to which adhere fragments of rock 
and shells ; the feelers are numerous, conical, or lengthened, and variously 
annulated or variegated vvith white and red. 
48. A. sulcata. — Body longitudinally sulcated, the tentacula 
exceeding its length. 
Hydra tentaculis denudatis, numerosissimis ; corpore longitudinaliter 
sulcato, Gaert. Phil. Trans. 1761, 78. t. i. f. 1. — A. sul. Penn. Brit. 
Zool. iv. 48. — A. maculata, Adams, Linn. Trans, v. 8 — A. cereus, 
Turt. Brit. Fauna, 131. — A. sul. Stewart's El. i. 394 — Bocks of Corn- 
wall. 
Body smooth, of a chesnut colour, the margin of the oral disc dentated ; 
the tentacula, which the animal cannot wholly withdraw, are greenish, with 
a red tip, nearly 200 in number, and greatly exceed the body in length. 
44. A. pedunculata. — Body lengthened, the lower part nar- 
row, smooth, the upper enlarged, and gland ularly warty ; oral 
disc expanded, lobed ; tentacula in several rows, variegated. 
Hydra calyciflora, tentaculis retractilibus variegatis, corpore verrucoso, 
Gaert. Phil. Trans. 1761, 79. t. i. f. 2 — A. ped. Penn. Brit. Zool. iv. 
49. — A. bellis, Turt. Brit. Fauna, 131. — A. plumosa, Stewart's El. i. 
394. — Southern coast of England. 
Stalk cylindric, body suborbicular, of a brown colour, with fragments of 
shells adhering to the warts ; tentacula unequal, those nearest the mouth 
longest, variegated ; a spotted space round the mouth variegated. A grega- 
rious species. 
45. A. dianthus.- — Body cylindrical, oral disc expanded, five 
lobed imbricated, with short tentacula. 
Ellis, Phil. Trans. 1767, 436. t. xix. f. 8 — A. pentapetala, Perin. Brit. 
Zool. iv. 50 — A. senilis, Adams, Lin. Trans, v. 9. — A. dianthus, Turt. 
Brit. Fauna, 131. Steivart, El. i. 394 — Gregarious in pools near low- 
water mark. 
Body soft, pale bluish-white, diaphanous, with whitish veins, and nume- 
rous pores ; oral disc lobed at the pleasure of the animal, covered with short 
narrow flat tentacula ; mouth deeply striated, four of the striae on one side 
more deeply seated, forming prominent ridges. 
46. A. mtestinalis. — Body cylindrical, the upper half sud- 
denly contracted, and narrow. 
Fah. Fauna Groen. 351. t. i. f. 11. — Adheres to rocks at low-water mark, 
Zetland. 
When contracted, the body seems like two broad rings, of nearly equal 
breadth, and about half an inch in diameter; when expanded to nearly two 
