Ortmann — Invertebrate Fossils from Patagonia. 375 



cross the revolving ribs. Last whorl large. Mouth triangular, 

 continued into a long and straight canal. Height, 50 mm , but 

 defective on upper end ; diameter, 25 mm . 

 San Julian. 



26. Fusus torosus sp. nov. Shell subturbinate or subfusi- 

 form. Spire short, rather depressed. Whorls four, last one 

 very large. Surface with numerous fine spiral ribs, which are 

 rather crowded and somewhat unequal, crossed by very fine, 

 squamiform lines of growth. Whorls strongly convex, swollen, 

 with ca. seven strong, variciform longitudinal ribs, which begin 

 at the suture and become thick and swollen in the middle of the 

 last whorl, attenuating again toward the lower end of the shell. 

 Mouth ovate, continued into a canal of moderate length, which 

 is slightly curved. Height, 31; diameter, 20 mm . This species 

 resembles somewhat F. pyruliformis Sow., from ISTavidad, and 

 I would not hesitate to identify it with this species. But Sow- 

 erby's figure seems to be poor, and the account given by Phil- 

 ippi and Moerieke of F. pyruliformis shows clearly that it is 

 different. 



Santa Cruz. 



27. Fusus cancellaius sp. nov. Shell small, fusiform, elon- 

 gated. Spire a little shorter than the last whorl. Whorls 

 convex, surface ornamented by revolving and longitudinal ribs, 

 cancellated. Spiral ribs, in the upper whorls, 4-5, 12-18 on 

 the last whorl ; they are sharp, but flat, equidistant, narrower 

 in the intervening spaces between the longitudinal ribs, and on 

 the points of intersection with them slightly broadened, giving 

 the appearance of low tubercles. Longitudinal ribs 12-13 on 

 one whorl, rounded, but distinct, running from suture to suture, 

 but disappearing on the canal. Mouth elliptical, canal com- 

 paratively short. Outer lip crenulated within. Height, 16 mm ; 

 diameter', 6-5 mm . 



Santa Cruz. 



28. Fusus pilsbryi sp. nov. Shell thick, elongated, fusiform ; 

 spire a little shorter than the last whorl. Whorls 7-8, convex, 

 slightly appressed in the upper part, ornamented with 8-9 

 strong, rounded longitudinal ribs, which are slightly oblique 

 and curved. On the upper whorls these ribs reach from suture 

 to suture, on the last whorl they disappear below the middle. 

 All of the surface of the shell is covered by very fine, numer- 

 ous, distinct and subequal spiral striae. Mouth comparatively 

 small, continued into a short canal. Outer lip thick. Height, 

 36-5 mm (not quite complete) ; diameter, 12 mm . 



Santa Cruz. 



29. Murex hatcheri sp. nov. Shell ovato-subfusiform. 

 Whorls 5-6, rapidly increasing. Spire short, conical. Upper 

 whorls angulated by a prominent, but blunt carina, which is 



Am. Jour. Sci. — Fourth Series, Vol. X, No. 59. — November, 1900. 

 25 



