SERPULA. 



end terminating in numerous fmall tubes ; the di(l< is convex, 

 and covered with round perforatious, with a longitudinal 

 one in the middle. 



EcHiNATA. Shell roundifh, flexuous, rofy, with nume- 

 rous rows of pricltles, obtufe at the end. It is the fize of 

 a crow's quill ; the aperture is margined. 



OcREA. The fliell of this is roundifh, ftriate, brown. 

 It inhabits the Indian ocean, ufually afBxed to corals. 



Protensa. Shell poliflied, fn:oothi(h, with annulate 

 plaits, a little tapering towards the end. It is found in the 

 Indian and American feas, and is the fize of a quill. The 

 fhell is ivory, whitiOi or blueifh, either Itraight or partly 

 bent. 



Decussata. Shell round, with decuflate ftrise, flightly 

 wrinkled, flexuous, red, within fmooth and white. 



Proboscidea. The (hell is fmooth and white ; the 

 broader part is ilraight and tranfverfcly plaited. The (hell 

 is from two to four inches long, white, or of a duflcy 

 brown. 



Afra. Shell fub-flriate, yellowifh-brown, round, twifted 

 into three whorls, with a ceiitral tip. It is found about the 

 coafts of the ifland of Goree. 



Cereolus. Shell round, fmooth, yellowifli, many 

 times twifted. It inhabits America. The Ihell is long and 

 narrow. 



Gornucopi.^;. Shell conic, fpirally twifted, yellowifh, 

 with brown bands ; the middle is round and twifted ; the 

 aperture is orbicular. The ftiell, as to its form, is obtufe at 

 the tip. 



Goreensi.?. The (hell is round, cancellate, yellow, 

 within horny. It is found at Goree, fixed to teftiaceous 

 fubftances and wood ; is from eight to nine inches long, with 

 elevated ftriae ; the longitudinal ones are crowded. 



Intestinalis. Shell triangular, twifted, fragile, tuber- 

 culate, with hollow dot?. This is found on the African 

 coaft. The (hell is whitifti, (ingularly twifted, fub-umbili- 

 cate, within glabrous. 



Infundibulum. The (hell is round, white, tranfverfely 

 ftriate, and thrice twifted ; the (irlt bend appearing' as if 

 compofed of five funnels placed on each other. 



PyRA.MlD.\Li.s. Shell cini-reous, above convex, beneath 

 flat, pyramidal, hence its fpocific name, and it is many times 

 twifted, the bends decreafing inwardly. It is found in the 

 Indian fca, adhering to tcftaceous fubftances about an inch 

 long, open at the narrower end ; fometimes it is ftraighti(h, 

 or a little bent. 



Denticulata. The (hell of this is white, round, fubu- 

 late, ftraight, toothed at the fides, with a longitudinal gla- 

 brous rib in the middle ; the tip is a little incurved and gla- 

 brous. It is found adhering to the Lepas tintinnabulum, and 

 ie about three-quarters of an inch long. 



Melitensi.s. Shell roundifti, twilled, umbilicate, with 

 decuilate llrix, and longitudinal nodulous nbs, within 

 fmooth, with numerous divifions. It is found foffile in 

 Malta. The two rtrft bends are placed on each other. 



NoKWEGic.'.. The ftiell of this is round, fmooth, in- 

 curved, with a nearly obfolete undulate bafe : the mouth is 

 obliquely truncate. It is found, as its fpecific name de- 

 notes, in Norway. 



PoRRECTA. Shell round, fmooth, polilhcd, afcending 

 in a flexuous manner from the fpiral bafe. It inhabits the 

 North feas. The ftiell rtfrmbles the S. fpirillum, but is 

 whiter, pellucid, and not rugged ; the inhabitant is fhort, 

 with a red back and paler fides. 



Vitrea. The (hell is round, regular, fpiral, orbicular, 

 pellucid, fliining, wrinkled, with a thickened aperture. This 

 II 



fpecies is found in the Greenland feas, on fertularii, 

 fuci, ftones, and divers marine fubftances. It refembles 

 the S. glomerata ; the (hell is thick, umbilicate, not a 

 line in diameter, and fometimes it is of a reddilh colour. 



Ca!»cellata. Shell fpiral, glomerate, with three 

 grooves, the lower groove interrupted by tranfverfe lines. 

 It inhabits the Greenland feas, and refembles the S. 

 granulata. Shell white, grey or greeiii(h, the aperture is 

 two-toothed. 



Stellaris. Shell fub-orbicular, umbilicate, convex, 

 radiate with wrinkles. This alfo is found in the Greenland 

 feas, on fertulariae and ftones. The (hell is fcarcely larger 

 than a needle, violet, reddi(h-brown, or yellowilh radiate 

 with white ; beneath it is flat, with a fingle whorl or bend ; 

 the aperture is very minute. 



Gigantea. The (hell of this is fomewhat triangular, 

 with a little bend, gradually tapering, violet, within 

 fmooth, pale yellow, the aperture is white, with undulate 

 ftriae, and armed with a conic tooth. It inhabits Africa 

 and America, attached to rocks and corals. The (hell is fix 

 inches high, and as thick as the little finger. The inha- 

 bitant is whiti(h. 



CiNERE.\. The (hell is filiform, glabrous, conglomerate, 

 perforated. It inhabits the (hores of Maffilia ; it is gla- 

 brous, of a greyilh-white, and flexuous. 



* SuLCAT.-V. Shell with two whorls, deeply and fpirally 

 grooved. It inhabits the coafts of Pembrokelhire, on the 

 roots of the Fucus digitatus. It is a minute (hell, of a 

 greeni(h colour. 



* OvALis. Shell fub-oval, imperforated. It is found at 

 Tenby. The (hell has two bends, which form an oval ; it 

 is never perforated, and is minute. 



* Reflexa. The ftiell is regular, rounded, with a rc- 

 fledtcd margin at the aperture. This is found on the 

 Pembrokelhire fands. It is minute ; fhell gloffy, white, 

 perforated ; the aperture is above the plane of the fpire. 



* Cornea. The ftiell is regular, rounded, and pellucid, 

 with three whorls. This alfo is an inhabitant on the Pem- 

 brokefhire coaft. It is brown and horny. 



* BicoRNls. Shell fcmilunar, ventricofe, white, opaque, 

 gludy. It is found at Sandwich and Reculver, and is 

 minute. 



* Peufouata. Shell femilunar, perforated, wliite,opaque, 

 gloffy. It inhabits Sandwich, as do all thofe that will be 

 hereafter dtfcribed. This is, however, as well as the next, 

 very rare and minute. 



* La< TEA. The ftiell is ovate, thin, fmooth, pellucid, 

 with milky veins. 



* Lagena. Shell rounded, ftriate, grooved, with a 

 narrow neck. Tliis is dcfcribcd, as are all thofe which 

 are found in this country, in Adams's work on the Micro- 

 fcope. The (hell of this is exaftly ftnped like an oil-fladc, 

 and is whitilh. 



* Retorta. Shell rounded, margined, with a ftender re- 

 curved neck. The ftiell is white, opaque, ftiaped lomcthing 

 like the retort uh.d by chemifts. 



Incukvata. Tiie (hell is ftraight, with three clofe 

 whorls at the fmalier end. The ftiell is white and tranfpa- 

 rent, and refembles, in fome refpetls, the Nautilus femi- 

 lituus. 



SERPYLLUM, in Botany, fometimes written Serpillum, 

 fo called from its humble creeping mode of growth. See 



THY.MUS. 



SERQUEUX, in Geography, a town of France, in 

 the department of the Upper Marnc ; 3 miles N. ot Bour. 

 boane. 



SERRA, 



