WORMS. TESTACEA. 68. Mytilus. 289 



A. Parafitkal: affixed as it were by claws. 



Crista galli Shell plaited fpinous; both lips rough. 



Bar but, tab. 1 1 .fig. 12. Rumpf. Muf tab. 47. D. 

 Argetvv. conch, tab. 20. D. Petiv. amb. tab. 20. fig* 2. 

 Gualt. teft. tab. 104 E. Knorr. del. tab. B. iv. fig. 8. 

 Knorr Vergn. J^'.tab. io. fig. 3 — 5 and 5. t. 16./. U t. IJ. f. 1-3. 

 Chemn. conch. 8. iab.Jpfy.fig, 683, 684. W""' 

 2i Gualt. test, tab^ \o\fig. D. ( 



.Chemn. couch- 8. ta£. J$.fg. 675. 

 3. Da-vil. catal.fH. 1. ta£. ig. fig. 10* 

 4^ Chemn, conch* 9. /#£. l\6. fig. 998. 



Inhabits the Indian Ocean and &?</ .$■?#, affixed to Gorgonia ; 



j^i<?// purple-violet pale cinnamon of bay, rough with raifed 



do'ts, within honey -colour ; nearly equivalve clofed with 



5-8-10 oblique or ilraight acute plaits; hollow at the hinge 



tfiangukr. 



tifotis. Shell plaited and imbricate with broad eompreiTed fcales" 



both lips imooth. 

 Barbut. tab. II fig. 3. Gualt, test. tab. 103, A. qf ' 

 Argcnnj, Zoomorph tab. \z fig. F« 

 Chemn. conch. 8. tab. J^-fg. 685. 

 Inhabits the Ocean^ on beds of Coral j Jhell dirty greenifh-yellow 



lamellate, the plaits curved here and there and beiet with 



hollow grooved nuclei. 



'rons. Shell plaited fmoothifh : one lip rough. 



Argen<v. conch, tab. 19. D. Gualt. test. tab. 104,, C 



Knorr l r ergn. 4. tab. S t Jig. 3. 



Bern. Muf. Caf. Vind. teft. p. 121. vign.jig. b. 



Chemn. conch. 8. tab. J^.fig. 686- ' 



Inhabits the American Ocean y on Coral beds : Jhell reddifh blueifii 

 or brown* generall) oval with the margin plaited each fide and 

 denticulate': Icwer-valve glabrous and grooved in the middle; 

 upper-vafae rough with raifed dots at the margin and art ele- 

 vated rib in the middle. 



B. Flat or compreffed into a flattened form and /lightly eared. 



Margariti- Shell flattened, nearly orbicular, with a tfanfverfe bafe im-4 

 f eru ** biicate with toothed tunics. 



Barbut. tab. io. fig. 4, Rumpf Muf. tab. 47. F. 



Argenville conch, tab. 20. A. Gualt. teft, t. 84./. E, F, G, 



Lifter, tab. 221. fig. 56. tab* 223, 224* 



Bonan. recr. and Muf Kirch. 2. fig. 1. 



Fetinj. amb. aq, tab. 2Q. fig. 4 — 7, 



Knorr Vergn. 2, t± 25./. 1—3 and 4.- /. 18,/. I, 



VOL, IVv-Oa Bot* 



