Pyrula canaliculata. P. carica. P. perversa. P. candelabrum. P. ternatana. P. bezoar. P. rapa. P. papyracea. P. tuba. P. bucephala. P. vespertilio. P. melongena. P. reticulata. P. ficus. P. ficoides. P. spirata. P. spirillus. P. elongata. P. galcodes. P. angulata. P. squamosa. P. nodosa. P. citrina. P. abbreviata. P. neritoidea. P. deformis. P. lineata. P. plicata. _P. melongena._ The open-mouth Pyrula. Pl. 25, fig. 6. Species ventricose, tube or canal short; aperture very large and effuse; tuberculated, striated longitudinally. _P. ficus._ The fig Pyrula. Spire very short; volutions rounded above; very thin and ventricose; colour yellowish brown, with dark brown spots; covered with decussated striæ. 8. Struthiolaria. Two species. The shells of this genus are marine, inhabited by mollusca, that, by frequently moving in and out of the shell while wandering on the shore in search of food, produce singular callosities on the two edges of the aperture. They generally resemble the Murex and Buccinum, but are distinguished by a thickened marginal lip on the right side. Shell ovate, spire produced; aperture sinuous, terminated at the base by a very short canal; straight, and without a notch; columellar edge callous and effuse; right edge with a thickened varix. Struthiolaria nodulosa. Struthiolaria crenulata. _S. nodulosa._ The nodulous Struthiolaria. Pl. 25, fig 1. Ovate, grooved and striated transversely; top of volutions flattened and nodulous; cream-coloured, with undulated, brownish-yellow longitudinal lines; interior of lip yellowish. 9. Ranella. Fourteen species. This genus of shells has two rows of varices or thickened bands, arranged on either side in rows, so that it forms a distinct division between the Struthiolaria and the Murex. Shell oval, as if depressed by the preservation of each side of a longitudinal thickened band; aperture oval, almost symmetrical by the excavation of the columellar edge, terminating anteriorly by a short canal, often a little sloping; a sinus at the posterior junction of the two edges.