*M WORMS. T 1 EST ACE A; 48. My tiliisV f 



308. MYungutatus. pblortg-oval, smooth, incurved anrT 

 much pointed at the beak : hinge terminal, 2 

 toothed. 



Donovan t. 123./. 2. C/iem. Conch, 8. >. 85./. 7 $6. ' 



Shell about 4 inches long, and 2 broad, bluish-black with a. pic- 

 ture of green, m.uch pointed and incurved at the beak, rounded be^ 

 low : hinge with 2-6 teeth besides numerous crcnatures on the 

 groove. . ' . • 



309. M. Modiolus. Oblong, wrinkled, very obtase at the 

 beak, with a gibbosity each side below it. 



Br. Zool. t. 66 f.77. , Donov. t. 23^ If a, Cost. t. i 5 .'/. 5 . 



Shell 4 or 5 inches long, 2 or 3 broad; covered with a purplish- 

 black skin, perlaceous within, a little angular on one side, much 

 rounded at the beaks which are rather lateral. 



310. M. umbilicatus. Oblong, contracted into a deep 

 rugged cavity, opposite the hinge, forming a deep 

 hollow when the valves are closed. 



Br. Zool. tab. 65. f;j6. Donovan tab, 40. 



Shell about 2 inches long, thick, rounded at the beak, blackish, 

 contracted on one side into a deep, rugged- hollow under the 

 beak. 



311. M. rugosus. Rhombic-oval, rugged, brittle, anti- 

 quated, obtuse at both ends. 



Br. Zool. tab. 63.y_.72. Donovan tab. 141. 



Shell about an inch and a quarter broad, half as much long, dirty- 

 yellow generally covered with a yellowish skin, often gaping and 

 truncate atone end : beak fmall, near the thicker and rounded end. 



312. M. pr&cisus. Oblong, wrinkled, one valve larger, 

 abruptly truncate at the end near the beak. 



Montague Brat. Shells,. p. 165. tab. 4./. 2. . . 



> Shell resembling the last, except that it is fquare at the end near 

 the hinge,, and one valve is rather larger and receives the other : 

 . . beak large, prominent; hinge rugged, inflected,. with.a hollow under 

 the margin. 



313. M. Crista Gallil Affixed, spinous, compressed, 

 ' -- undulately plaited On the margin; both lips rough. 



Barbut tab. 1 »._/*. 1. 2. Montague p. 166. 



Shell 2 inches and a half wide, varying in shape, ferruginous or 

 dull purple, deeply plaited on, the margin, .affixed, by the opposite 

 end, striate with raifed dots, glabrous, and horn-colour within, 

 . marked with a. feries of raifed. dots near- the margin,.. armed exter- 

 nally with compressed fpines which are concave within.:;. hinge 

 quite simple, linear, toothless. /.'•.' 



3t4. M.Mscors. Oblorig-oval, very convex, produced and 

 narrower at the anterior end, striate longitudinally 

 on both sides and transversely in the middle. 



Donovan tab. 25. Linn. Trans. \\\\. p. 111. t. 3./. 8._ 



Shell an inch and a:half wide, 4 lines long, brown, femitranfpa- 

 1 rent* strongly striate longitudinally at the sides ahd very faintly 

 tranfverfely in the middle, within, white or pale pink ; margin 

 crenulate at the'larger end : beak oblique, near the larger end. 



315. M. discrepans. Sub-oval, compressed, rounded and 

 broader at the anterior end, striate longitudinally on 

 both sides and transversely in the middle. 



Montague Brit.Shelts p. 169. n. 11. Linn. Trans. \\'\\.,t. 3 : / r o. . 

 SAvY/refembling the last, but is less, covered Vilh'an olfve-grecn 



