38 MOLLUSCA. TJIACHELIPODA. 



of which the beak forms fully the half. Inhabits Indian seas. 

 Bonan. pi. 268. 



M. saxatilis, Lin. Shell subfusiform, ventricose, transversely groov- 

 ed, with six foliated varices ; beak short ; colour whitish, banded 

 with purple, but varying much in this respect ; aperture purplish 

 rose-coloured. 7 inches long. Rumph. Mus. pi. 26, fig. 2. 



M. erinaceus, Lin. Shell ovate, angulated, transversely ribbed, with 

 several strong and somewhat foliated and scaly varices ; aperture 

 oval ; beak recurved ; canal edged. 1J inch long. Penn. Brit. 

 Zool. iv. pi. 79, fig. 1. 



Gen. 28. RAXELLA, Lam. Murex, Lin. 

 Shell oval or oblong, subdepressed, canaliculated at the base, 

 with distichous varices ; aperture rounded or ovate ; varices 

 straight or oblique, at intervals of half a turn, forming a lon- 

 gitudinal row on each side. 



R. gigantea, Lam. Shell with two nearly opposite varices and de- 

 cussated ribs, tuberculated at their intersections ; aperture near- 

 ly toothless ; beak slightly ascending. 6 inches long. Inhabits 

 American seas Born, Mus. pi. 1 1, fig. 5. 

 This species is very tubercular. It is not, however, truly reticulated, but the rows 



of tubercles, which are all transverse, form a kind of trellis. The colour is pale 



brownish or purplish white, the tubercles darker. 



R. bufonia, Lam. Shell ovate, gibbous, nodulous, grayish white, 

 with small fuscous spots ; two opposite varices, with transverse 

 granulated striae ; lip very thick, and the interior margin dentated. 

 2 inches long. Indian seas D'Argenv. pi. 9, fig. R. 



R. ranina, Lam. (M. gyrinus, Lin.) Shell ovate-acute, with 

 transverse granulated striae ; colour white, with reddish chest- 

 nut-coloured bands ; beak short ; aperture rounded ; margin of 

 the lip toothed. 1^ inch long. Inhabits Mediterranean. Seba, 

 Mus. iii. pi. 60, fig. 25-27. 

 Fossil species of this genus are met with in the London clay and green sand. 



Gen. 29. STRUTHIOLARIA, Lam. Murex^ Gmel. 

 Shell oval, with elevated spire ; aperture oval, sinuous, termi- 

 nated at the base by a very short and straight canal, not 

 notched ; left margin callous, spreading ; margin sinuous, 

 with an exterior ridge ; no ridge on the spire. 



S. nodulosa, Lam. Shell ovate, grooved, and striated transversely, 

 with the upper ends of the whorls flattish and nodulous ; colour 

 white, with undulated yellow longitudinal lines ; lip reddish yel- 

 low within. 2 inches long. Inhabits seas of New Zealand. 

 Favanne, pi. 79, fig. 8. 



%. No constant ridge on the right lip. 



Gen. 30. PYRULA, Lam. Murex, Bnlla, Lin. 



Shell subpyriform, canaliculated at the base, ventricose above, 



