54 



S. NOTATUS, n. sp. — Shell small consisting of four depressed convex 

 whorls of which the last equals the apical three in length. The outline is 

 strongly curved on the posterior side (or side opposite the aperture). 

 Apical angle about 45'^. The shell is mostly all removed from the speci- 

 men, but on the cast there is a concave band on all the whorls just above 

 and close to the suture. This is so distinctly marked as to induce the 

 belief that it is not an individual peculiarity. Length of the specimen 16 

 lines ; length of body whorl 8 lines ; width of the same 7 lines. Junction 

 Cliff; Div. 1, A. G. J. Richardson. 



Genus Pleurotomaria, Defrance, 



Fig. 19. — Pleurotomaria Si/UUin a, Side view; a, the band enlarged. 



P. Sybillina, n. sp. — Shell conical; apical angle about 70°; whorls 

 four or five, moderately convex. The whorls are angular ventricose ; on the 

 upper side gently convex with an obscure carina half way between the 

 suture and the margin. On the upper side of the margin there is a narrow 

 band which appears to be convex with an elevated hne above and another 

 below it. Below the band the side of the body whorl is nearly vertical for 

 about one-fourth its height then convexly rounded into the umbilicus. Sur- 

 face covered with fine sharp striae which curve backwai-ds to the band ; 

 about eight striae in the width of one line. On the underside of the body 

 whorl of one specimen there is a set of distinct revolving strios crossing the 

 others at right angles and forming a minute square reticulation. Junction 

 Cliff; Div. 1, A. G. T. C. Weston. 



Associated with the above there are specimens without the carina on the 

 upper side of the body whorl although it is seen obscurely on the smaller 

 ones. 



P. cryptata, n. sp. — Cast of the interior very depressed conical, con- 

 sisting of three rather slender whorls which have a rounded quadrate 

 section, the upper lower and outer sides of the whorls being depressed 

 convex. The second whorl rises about half its height above the first ; the 

 apical whorl minute. The umbihcus is about one-third the whole width. 

 In one specimen the whorls are more ventricose, the section being nearly 

 circular. Width 7 lines ; height 3^ lines ; diameter of body whorl near the 

 aperture 2| lines. Near Challoupe River; Div. 3, A. G., J. Richardson. 



