4 20 CONCH 
undulata. * 34. A. margin cremated; flat valve thin and fmooth, 
with a large oval perforation ; convex valve with tranf- 
verfe arched Arise, croffing undulated longitudinal ones. 
Mediterranean, North feas, Devonfliire. 
capenfis. 35. A. longitudinally flriated, a little truncated ; 
tvith a rounded notched margin. C. of G. Hope. 
detruncata 36. A. truncated, orbicular, longitudinally flriated ; 
flat valve with three ribs within ; other valve longi- 
tudinally flriated within, and divided by a partition in 
the middle. Mediterranean. 
fanguino- 37. A. horny, fmootb, and convex on each fide; 
kata. upper valve emarginated, and radiated at the fides, 
with an elevated fanguineous back. India. 
Wtrea. 38. A. ovate, ventricofe, hyaline ; lower valve with 
two bony rays at the hinge, befides lateral teeth ; upper 
valve with a prominent perforated tip ; i-i- inch long, 
1 inch broad. Mediterranean. 
cranium. 39. A. fmootb, ventricofe, finely flriated tranf- 
verfely ; ^ inch broad, fomething longer. Norway feas. 
dorfata . 40. A. heart- draped, folid, with arched tranfverfe 
ring and wrinkles, and longitudinal firiae and grooves. 
Magellanic feas. — Is often found foflil. 
pffittccea. 41. A. horny and finely flriated longitudinally ; 
fhorter valve gibbous ; longer one flat, with an incur- 
ved tip, triangularly perforated; rather large, pellucid. 
Greenland. Very rare. 
tridentata. 42. A. yellowith, pellucid, thin, finely flriated 
tranfverfely ; tricufpidate with tubular points ; valves 
united. Mediterranean. 
fpondyloi- 43. A. ovate, antiquated, with anobtufe channelled 
des. beak. 
ventricofa. 44. A. fubovate, folid, with a channelled beak. 
gryphoides 45. A. oval, fmootb, folid, opaque ; leffer valve 
with a ftraight, obtufe, truncated beak. 
jlexuofa. 46. A. very thin, lamellated, hollowed in the mid- 
dle ; upper valve fiat ; lower valve convex towards the 
crown, with an orbicular perforation beneath it. Nor- 
way feas. 
rugofa. 47. A. obovate ; upper valve convex and finely 
wrinkled ; lower valve thin and fmooth, with a kidney - 
fhaped perforation. Norway feas. 
Cylindrical. 48. A. very thin, cylindrical, and narrowed out- 
wardly ; upper valve gibbous, lower hollow. North 
feas. 
nucleus .. 49. A. glabrous, oval, longitudinally grooved. 
North feas. . 
avenacea . 50. A. pyriform, protracted, and (lightly comp reded 
towards the hinges. North feas. 
Jandaleum. 51. A. turbinated ; back flat, with a flriated cavity; 
lid flat and hemifpherical. Germany, in a foflil ftate. 
44 
Mytiiu*. Gen. 16. Mytilus, The Mujfel. 
Gen. Char. — The animal is allied to an afcidia ; the 
(hell bivalve, rough, generally affixed by a byffusor 
beard of filky filaments ; hinge moftly without 
teeth, with generally a fubulate, excavated, longitu- 
dinal line. 
Species. 
A. Parafitical, affixed as it were by claws. 
crifla-galli. S. M. plaited, fpinous ; both lips rough. Indian 
ocean and Red fea. 
htjotis, 2. M. plaited and imbricated, with broad compreffed 
fcales ; both lips fmooth. Inhabits the ocean, on beds 
ef coral. 
o h O G Y. Chap. iv. 
3. M. plaited, fmoothifh j one lip rough. American from. 
ocean. 
E. Flat, or compr ejfed into a flattened form , and flight fy 
eared . 
4. M. Pearl-bearing mujfel. Flattened, nearly orbi- margariti- 
cular, with a tranfverfe bafe ; imbricated with toothed ferns . 
tunics. American and Indian feas. — This fpecies is a- 
bout 8 inches long, and fomewhat broader ; the infide 
is finely poliflved, and produces the true mother-of- 
pearl ; and frequently alfo it affords the moff valuable 
pearls. When the outer coat of the (hell, which is 
fometimes fea-green, or chefnut with white rays, or 
whitifh with green rays, is removed, it exhibits the 
fame pearly luftre as the infide; the younger (hells 
have ears as long as the (hell, and referable lcallnps. 
S’ M. roundifli ; longitudinally flriated, pellucid, unguis. 
and (lightly eared. Mediterranean. 
C. Ventricofe or convex. 
6. M. cylindrical ; rounded at both ends. Euro- lithopha- 
pean, American, and Indian feas. It is about an inch gus. 
broad, and 3 long. — It perforates and eats away coral 
rocks, and even the hardeft marbles. Thofe which 
are found in Europe have a thin brittle (hell : the (hell 
of thofe found in India is foft, and nearly coriaceous. 
7. M. rhombic, oval, brittle, rugged, antiquated, rugofus, 
and round at the ends. Seas and lakes, north of 
Europe. — It is ufually found lodged in limeflone ; each 
individual in a fep&rate apartment, with aperturts too 
fmall for the (hell to pafs through. 
8. M. flriated with vaulted knobs, and a white par -bi/ocularis, 
tition. Nicobar iflands. 
9. M. convex; one of the margins angular; th eexu/lus. 
anterior extremity crenated ; inch long. Ameri- 
can ocean and Red fea. 
ie. M. fmoothifli ; ferruginous on the outfide, and barbalus* 
bearded -at the tip ; \ inch long. Mediterranean and 
Norway feas. 
* 11. M. Eatable or common mujfel. Smooth, violet ; edulis. 
valves (lightly recurved on the obtufe fide, and fome- 
what angular on the acute fide ; beaks pointed ; from 
2 to 3 inches long. European and Indian fea. — This 
fpecies is obferved to be larger within the tropics, and 
to diminifti gradually towards the north. It is found 
in large beds, and generally attaches itfelf to other 
bodies by means of its long filky beard. The fi(h is 
employed as food in many parts of the world, and is 
efteemed rich and nutritious. 
* i 2. M. very crooked on one fide near the beaks, incurvatus 
then generally dilated ; within with a violet tinge. 
Coaft of Anglefea. 
* 13. M. oval, tranfparent, and elegantly radiated pellucidus. 
lengthwife with purple and blue ; two inches long. 
Anglefea, in oyfter beds. 
* 14. M. contra&ed into a deep rugged cavity, oppo -umbilica- 
fite the hinge, forming a deep hollow when the valves tus. 
are clofed ; 5 inches long. Anglefea. 
*15. M. fiiort, ventricofe, obtufe at the beaks, and curtus. 
dirty yellow. Weymouth. 
16. M. fmootb, (lightly curved; hind margin in -ungulates, 
flefted ; hinge terminal, two-toothed. Mediterranean, 
Cape of Good Hope, and New Zealand. Found at the 
latter place refembling M. edulis ; but is 5 inches long, 
and broad* 
