278 NATURAL HISTORY 
Fig. xxi. The purple fcallop variegated with white circular 
fillets ; PeEluncidus purpuraftcens vittis albis circularises variega- 
tus. Ibid. 
xxii. The purple ribbed fcallop; PeSien altis ftriis albo -pur pureis, 
tranftverse variegatis inftgnis. Helford Harbour. 
xxiii. The light purple tellina with horizontal Jlrice , eminent, and 
parallel to the margin ; Concha in vzrtice leviter purpuraftcens ftriis 
eminentibus margini parallelis diftinBa : Tellina tertia Aldrovandi 
ut videtur. 
xxiv. The white crooked-bill bivalve of the bernacle; Concha 
Icevis candidior , triangularis , vertice admodum reflexo et acutninato. 
Whitfand-Bay. 
xxv. The polifhed tellina ; the fillets difpofed at different dis- 
tances, but of an equal breadth throughout as to themfelves, with 
a ferrated edge ; Tellina vittis albo-luteis & purpuraftcentibus leviter 
ftriata , margine ferrato. Ibid. 
Tellince varie radiates , ftaftciatce , vittatce , Icevigatce , aftperes , fulco - 
ftriatce pulcherrimce , et Cbamce parvee (ut plurimum tamen ad 
littora Whitfand-Bay) funt frequetiter repertce. 
xxvi. The flat, fmooth, fmall fea-egg ; Ovulum tnarinum Iceve , 
minimum , ftgurce compreJfee y or, Echinus marinus minimus : a the 
back, b the belly. Mount’s-Bay. 
xxvi i. The round and flat fea-egg ; Echinus marinus rotundas , 
ftgurce compreftfee , papillis minimis, ftpinis ftpoliatus. We have them 
in the Mount’s-Bay from 4 1 inches high and five inches diame- 
ter, down to one eighth of an inch high, and two eighths of an 
inch diameter. 
xxvi 11. The deprefled cordate fea-egg ; Echinus marinus depreftse 
cordatus. Mount’s-Bay. 
xxix. The narrow-mouthed balanus ; Balanus ore contraElo, 
cinereus. Mount’s-Bay. The elevation xxix, the plan xxx. 
The wide-mouthed balanus ; Balanus ore hiante magnus. 
xxxi. One valve of the pholas taken out of the middle of a 
ftone at Karn-Jenny, Mount’s-Bay. 
xxxii. The wrinkled, notched, and high-beaked concha or cockel; 
Concha cinerea denfta , margine dent at 0, ftriis rugofts et e lateribus un- 
dofte tuber culofts. Heyl -Mouth. C, D, are the two fliells of the jaw 
of the teredo , or auger-worm, with which it eats its way into tim- 
ber and ftone ; they are fharp, and turned ferew-wife one over the 
other for boreing. Found at Heyl-Mouth, 1756, in fir-timber, by 
the Reverend Mr. Williams of Glamorganlhire. 
sect. xiv. There being fuch quantities of recent fliells on the coafts of 
Foffil-fheiis. Cornwall, it might reafonably be expedted that extraneous and 
Mil- 
