EXPLANATION OF THE PLATES AND WOOD-CUTS. 



Plate XXVL 



(Fossils from the Tertiary Formations, Cutch.) 

 Fig. \. Bulla lignaria, Linn. This agrees perfectly with the recent species as far as 

 we can ascertain from specimens which are not perfect ; but it is quite distinct 

 from both the fossil shells described by Deshayes under the same name. 



Loc. Soomrow. 

 Fig. 2. Natica ohseura. Globose, umbilicate ; spire small, pointed ; whorls about 5, 

 convex, flattened, and ornamented at the upper edge with fine diverging plaits ; 

 umbilicus partly filled with a semi-cylindrical, obliquely-truncated callus. Height 

 1 \ inch, diameter the same. 



Nearly related to A^. Epiglottina, Lam., but distinguished by the flattened up- 

 per margins of the whorls ; and to Nerita canrena of Brocchi, Vol. ii. 296. 



Loc. Soomrow. 

 Fig. S. Natica callosa. Obliquely depressed; spire small, hardly projecting; um- 

 bilicus covered by the thickened and expanded inner lip ; aperture very large. 

 Height 2 inches, diameter If inch. 



A very distinct species. 



Loc. Soomrow. 

 Fig. 4. Globulus ? anguliferus. Oblong, obliquely striated ; spire produced ; whorls 

 about 4, with their sides and upper edges flattened ; umbilicus open, rather large. 

 Height and diameter f inch. 



The elevated lines or striae advancing towards the aperture as they descend the 

 sides of the Avhorls form a peculiar character. The aperture appears to be small. 



Loc. Borders of the Runn. 

 Fig. 5. Solarium affine. Convex above, flattish beneath, marked with diverging striae 

 on both sides ; whorls 4 or 5, with a deflected entire carina, above which are 4 

 furrows placed at nearly equal distances, and below, 2 furrows near the carina, 

 and 2 near the umbilicus, which is large, with a crenated edge. Diameter li inch, 

 height ^ inch. 



Perfectly distinct from Solarium perspectivum, which it somewhat resembles. 



Loc. Soomrow. 

 Fig. 6. Trochus cognatus. Conical with straight sides ; whorls numerous, ornamented 

 with several rows of granules, which sometimes (especially towards the apex) are 

 united by elevated lines, and a row of tubercles upon the inferior edges of the 

 upper whorls, succeeded by 2 rows upon the middle volutions, and crenated ridges 

 of slight elevation on the rounded border of the lowest whorls ; base flat, concen- 

 trically furrowed, containing a thick plait within. 



Like T. maculatus ; height 2 inches, diameter of the base nearly the same. 



Loc. Soomrow. 

 Fig. 1. Turritella angulata. Turrited, conical ; whorls convex, decorated by about 

 7 carinae, of which the lowest but one is much the most prominent. Height 1 \; 

 inch, diameter 8 lines. 



Loc. Soomrow. 



