A history of the British sea-anemones and corals . e muchneeded on both. Scoticus. MlTCHELLII. P; hastata. 234 GENUS II. PEACHIA (Gosse). Siphonactinia (Dan. et Kor.). Column cylindrical, pear-shaped, or swelling in themiddle, rounded at the posterior extremity, wherethere is an orifice; margin entire, forming an indis-tinct parapet. Surface smooth, without loopholes,but studded in every part with very minute and verynumerous suckers. Disk flat, or very slightly conical, smooth. Tentacles of one kind, twelve, thick, short, obtuselypointed; marginal; imperfectly retractile. Mouth not elevated o
A history of the British sea-anemones and corals . e muchneeded on both. Scoticus. MlTCHELLII. P; hastata. 234 GENUS II. PEACHIA (Gosse). Siphonactinia (Dan. et Kor.). Column cylindrical, pear-shaped, or swelling in themiddle, rounded at the posterior extremity, wherethere is an orifice; margin entire, forming an indis-tinct parapet. Surface smooth, without loopholes,but studded in every part with very minute and verynumerous suckers. Disk flat, or very slightly conical, smooth. Tentacles of one kind, twelve, thick, short, obtuselypointed; marginal; imperfectly retractile. Mouth not elevated on a cone; lip thin, abrupt, pro-trusile, sometimes lobed. A single gonidial groove,the edges of which are soldered together so as toform a tube, which terminates above in a thickened,expanded rim {conchula), the margin of which is moreor less divided. Acontia wanting. ANALYSIS OF BRITISH SPECIES. Column lengthened. Conchula with from 12 to 20 lobes hastata. Conchula with 3 ovate lobes triphylla. Column short. Conchula with 5 shallow lobes ASTRjEACEA. ILYANTHIDJi. THE ARROW MUZZLET. PeacMa VIII. Fig. 3. Specific character. Column lengthened; conchula bearing from 12 to 20lobes, which are mostly bifid ; tentacles marked with arrow-heads. Peachia hastata. Gosse, Linn. Trans, xxi. 267, pi. xxviii.; Man. i. 31, fig. 46 ; Ann. N. H. Ser. 3. i. 418. GENERAL Column. Club-, pear-, or spindle-shaped, or cylindrical, the same indi-vidual assuming all these forms ; lower extremity rounded, with a minutecentral orifice, distinct, but generally closed, and apparently furnished witha sphincter. Surface smooth, but covered with microscopically minutesuckers, which have the power of strong adhesion to foreign fleshy, becoming more membranous below, where, when in-flated, it resembles a blown bladder. Disk. Flat, but protrusile, as a low cone ; radii distinct. Tentacles. Twelve, in one circle,marginal; short, thick, and some-wha
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