MYTILUS.-Pl.a,te XL 



Hab. ? 



Of simple, ratiK 

 throuo-lioiit. 



gibbous form, graiiularly ridged 



Species 58. (Mus. Cuming.) 



Mytilus Charpentieri. Myt. testa oblongd, pecidiari- 

 ter gibbosissimd, postice concavo-impressd et obtuse an- 

 (julatd, undique dense flexuono-Uratd ; fiisco-hdm. 



Charpentier's Mytilus. Shell oblong, peculiarly very 

 gibbous, posteriorly concavely impressed and obtusely 

 angled, densely flcxuously ridged througbout ; fus- 

 cous-yellow. 



Dunker, MS. in Mus. Cuming. ; s ^ -' 



Hab. Guinea. 



A densely-ridged fuscous-yellow species, remarkable for 



its extremely gibbous growth. 



Of rather narrow contracted growth, rayed with flexuous 

 ridges, which are rather more than commonly distant. 



Species 60. (Mus. Cuming.) 



Mytilus glomeeatus. Myt. tesld oblongo-ovald, subob- 

 liqttd, concentrice rude rugosd ; intense cteruleo-nigrd. 



The grouped Mytilus. Shell oblong-ovate, rather ob- 

 lique, concentrically rudely wrinkled ; deep blue- 

 black. 



Gould, Ms. in Mus. Cuming. v ^ / 



Hab. ? 



Named glomcralus fro 



such dense clusters. 



its habit of attaching itself 



Species 59. (Mus. Cuming.) 



Mytilus ustulatus. Myt. testa angusfe oblongd, gib- 

 bosd, postice impressd, versus umbones subatlenuald, 

 radiatim liratd, Uris subdistantibus, flexuosis ; albidd, 

 nigricante-fnsco tinctd. 



The scorched Mytilus. Shell narrowly oblong, gib- 

 bous, posteriorly impressed, rather attenuated towards 

 the umboes, radiately ridged, ridges rather distant, 

 flexuous ; whitish, stained with blackish-brown. 



Lamarck, Anim. sans vert. vol. vii. p. 40. 



Hab. Borneo. 



Species 61. (Mus. Cuming.) 

 Mytilus granulatcs. Myt. testa oblongd, gibbos, 



! postice concavo-impressd, radiatim liratd, liris con- 



j spicue granulatis ; olivaceo-luted. 



The granulated Mytilus. Shell oblong, very gibbous, 



j posteriorly concavely impressed, radiately ridged, 



j ridges conspicuously granulated ; olive-yellow. 



j IIanley, Recent Bivalve Shells, p. 246. 



I Hab. South America. 



This shell partakes so much of the form and colour of 

 M. Charpentieri, that it would seem to be a variety of 

 that species. It is however remarkable ibr its very de- 

 fined granulated sculpture. 



