374 Ortmann — Invertebrate Fossils from Patagonia. 



mella excentric, margin of diaphragm a slightly concave and 

 slightly reflexed at the columella. Height, 16 mm ; diameter, 



IQmm 



Santa Cruz ; Punta Arenas. 



22. Dolium ovulinn sp. nov. Shell ovato-globnlar, spire 

 short, conical, acnte, last whorl large. Surface with fine and 

 crowded revolving strise, which are sub-equal, only in the 

 lower part finer ones are intercalated. Mouth large, elongated- 

 oval, canal very short, truncated, straight and comparatively 

 narrow. Inner lip without callous tubercles or folds. Outer 

 lip slightly thickened. Height, 34 mm ; diameter, 25 mm . 



Santa Cruz. 



23. Tritonium morgani sp. nov. Shell subfusiform, elon- 

 gated, with three varices. Whorls with fine, unequal, spiral 

 strife and large tubercles, the latter, on the last whorl, in three 

 spiral rows, those of the upper row large, ca. seven between 

 two varices; those of the middle row (5-6) small, and those of 

 the lower row (3-4) very indistinct. Columella smooth, with 

 a few indistinct crenulations in the lower part. Canal com- 

 paratively long. Outer lip distinctly crenulated, with an indis- 

 tinct canaliform emargination in the upper part, opposite 

 which is a fold on the inner lip. Height, 63 mm ; diameter, 

 28 mm . 



Santa Cruz. 



24. Buccinum annce sp. nov. Shell subfusiform, elongate- 

 oval. Spire long. Whorls 7-8, angulated, the angulation 

 with a series of tubercles, 12-14 of them on the last whorl, 

 which are continued downward as irregular longitudinal ribs. 

 Upper part of whorls slightly concave, appressed toward the 

 suture. Exposed part of upper whorls, below angulation, sub- 

 cylindrical. Last whorl large. Mouth ovate, elongated, upper 

 end subcanaliculate, lower end truncated, and with a short 

 reflexed canal, forming a varix on the columella. Outer lip 

 thin, smooth within. ""Height, 6Q mm ; diameter, 30 mm . This 

 species belongs into the subgenus Cominella. 



Santa Cruz. 



25. Fusus archimedis sp. nov. Shell fusiform, spire shorter 

 than the last whorl, scalariform. Whorls very prominently 

 angulated, suture very deep. Upper part of whorls, above 

 angulation, flat, obliquely descending from the suture, lower 

 part, below angulation, very slightly convex, obliquely reced- 

 ing downward to the suture. Angulation blunt, with a num- 

 ber (10-13) of blunt, often indistinct tubercles. Surface of 

 shell with fine revolving ribs on the lower part of the whorls 

 and upon the angulation, but these ribs are absent on the upper 

 part, above the angulation. Whole surface with distinct lines 

 of growth, which have a squamiform appearance, where they 



