CONCHOLOGY.' 
Chap. IV. 
nens in canalem integrum re&um five fubafcenden- 
tem. 
27. Trochus. Animal limax. Telia univalvis 
fpiralis, fubconica. Apertura fubtetragono-a-ngulata 
feu rotundata, fuperius tranfv&rfe coardlata 5 columella 
obliquata. 
28. Turbo. Animal limax. Telia univalvis, fpi- 
ralis, folida. Apertura coardtata, orbiculata, inte- 
gra. 
29. Helix. Animal limax. Telia univalvis, fpi- 
ralis, fubdiaphana, fragilis. Apertura coardlata, intus 
lunata feu fubrotunda ; fegmento circuli dempto. 
30. Nerita. Animal limax. Telia univalvis, fpi- 
ralis, gibba, fubtus planiufcula. Apertura femiorbi- 
cularis, vel femilunaris y labio columellas tranfverfo, 
truncato, planiufculo. 
31. Haliotis. Animal limax. Tefta auriformis, 
patens : fpira occult at a laterali difco, le-ngitudinaliter 
poris pertufa. 
32. Patella. Animal Ihnax. Telia univalvis 
fubconica, abfque fpira. 
33. Dentalium. Animal terebella. Telia tubu- 
lofa, refta, monothalamia, utraque extremitate pervia. 
34. Serpula. Animal terebella. Telia unival- 
vis, tubulofa, adherens (fsepe ifthmis integris paffim 
intercepta). 
35. Teredo. Animal terebella. Valvis duabus 
calcariis hemifphericis, anterius excilis, et duabus lan- 
ceolatis. Telia teres, flexiofa, lignum penetrans. 
36. Sabella. Animal nereis. Ore ringente, ten- 
taculis duobus crallioribus pone caput. Telia tubulofa, 
contexta ex arenulis confertim membianae vaginali in- 
fertis. 
terminating in an entire llraight, or {lightly afcending 
canal. 
27. T. Animal a Umax. Shell univalve, fpira], 
fomewhat conic. Aperture fomewhat angular, or 
rounded : the upper fide tranfverfe and contradled y 
pillar placed obliquely. 
28. T. Animal a limax. Shell univalve, fpiral, fo- 
lid. Aperture contradled, orbicular, entire. 
29. H. Animal a limax. Shell univalve, fpiral, fub- 
diaphanous, brittle. Aperture contradled, femilunar 
or roundifn. 
30. N. Animal a limax. Shell univalve, fpiral, gib- 
bous, flattilh at bottom. Aperture femiorbicular or 
femilunar, pillar lip tranfverfely truncated and flatten- 
ed. 
31. H. Animal a limax.- Shell ear-lhaped dilated, 
with a longitudinal row of orifices along the furface j 
the fpire lateral and nearly concealed. 
32. P. Animal a limax. Shell fubconic, without 
fpire. 
33. D. Animal a terebella. Shell tubular, flraight, 
or (lightly curved, with one cavity open at both ends. 
34. S. Animal a terebella. Shell tubular, generally 
adhering to other fubfiances (often feparafed internally 
by entire divifions.) 
35. T. Animal a terebella. With two calcareous, 
hemifplierical valves, anteriorly cut erf, and two lan- 
ceolate ones. Shell round, fiexuous, penetrating 
wood. 
36. S. Animal a nereis. With a ringent mouth, 
and two thicker tentacula behind the head. Shell tu- 
bular, confifting of particles of fand united to a mem- 
brane by a glutinous cement. 
I. MULTIVALVES, 
24 
Chiton. Gen. 1. Chiton. 
Gen. Char .— The animal inhabiting this {hell is a doris. 
The {hell confiils of feveral fegments or valves, ar- 
ranged along the back. 
Species. 
Jiifpidus. 1. C. (hell with fix plates or valves ftriated. Ame- 
rica. 
thalajjinus . 2, C. fhell fix-valved, glabrous, oval, a little con- 
vex, fea-green. America. 
tubercula- 3. C. {hell fcven-valved, body tuberculated. Ame- 
tus. lica. 
crinitus. * 4. C. {hell feven-valved, thick fet with Abort hairs, 
■§■ inch long. Sandwich, Aberdeen. 
aculeatus. 5. C. (hell eight-valved, ftriated 3 body prickly. 
Alia. 
fafcicula - * 6. C. ill ell eight-valved, apparently fmooth, but 
tus. when examined with a glafs, is found to be rough 
like (hagreen. Coaft of Barbary, Salcomb bay, Devon - 
(hire, Sandwich. 
fquamofus, 7. C. eight valves, femiftriated j margin covered 
with minute fcales. America. 
punBatus. 8. C. with eight valves, fmooth body with excavated 
dots. Europe, America, 
VCL. VI. Part II. 
9. C. eight valves, fubftriated 3 ftriae covered, body rider, 
red. North feas. 
* 10. C. eight valves, . fmooth, with tranfverfi lines albus. 
at the margin of the valves y body white, oval y firft 
valve notched on the hinder edge. Northern feas ; on 
oyfter {hells from Poole. 
11. C. eight valves, fmooth, carinated, oval, com -cinereus, 
preffed. Northern feas, Salcomb bay. 
1 2. C. feven carinated valves ftrongly beaked yfeptemval- 
beaks frequently rufous, -J inch long. Salcomb bay, vis. 
but rare. Montagu , Tejl. Brit, p.' 3. 
13. C. eight-valved, thick ridged ; the outfide fea- bicofor. 
green, infide fnowy, edged with black. 
14. C. eight-valved, cherry colour, fmooth, with cerajinus. 
fnowy marginal teeth. 
15. C. eight-valved, thick, black brown. Straits niagellani- 
of Magellan. cus. 
1 6. C. eight-valved, brown, fmooth y inftde teeth of fufcus. 
thq margin fnowy. India. 
17. C. eight-valved, fmooth, within fea-green, mar - macuhatus. 
gin covered with gray white fcales. 
18. C. eight-valved, fmooth, varied with white and tnarmora- 
black. Var. feven-Valved. America. tus. 
19. C. flat above, with numerous raifed dots mgranulatuv 
rows y border broad, fpinous. America. 
20. C. eight-valved, fmooth above, piceous and varied piceus, 
with white and black. America y Red fea. 
3 E 
21. C. 
