376 Ortmann — Invertebrate Fossils from Patagonia. 



situated below the middle of the whorls ; this carina forms an 

 angulation on the last whorl, and below it there are 4-5 other 

 carinae, decreasing in size. Upper part of whorls flat and 

 obliquely descending from the suture, with a few revolving 

 striae. Varices 5-6, lamelliform, strong and thick, at the 

 points of crossing with the spinal carina produced into short 

 leaf- or ear-like lobes, strongest on the uppermost carina. On 

 the upper whorls only the uppermost row of lobes is visible. 

 Mouth large, oval, with an open canal of medium length. 

 Outer lip ornamented with 5-6 lobes, corresponding to those 

 of the varices. Height, 63 mm ; diameter, 44 mn \ 

 San Julian. 



30. TJrosaljpinx elegans sp. nov. Shell ovato-fusiform ; 

 whorls 5-6, convex, with spiral striae and 7-8 longitudinal, 

 variciform costae, which are rounded. Mouth oval, elongated 

 into an open, but narrow canal, which is about as long as the 

 mouth. Outer lip distinctly crenulated within. Height, 16'5 mm ; 

 diameter, 8 mm . 



Santa Cruz. 



31. Marginella oliviformis sp. nov. Shell elongated, sub- 

 cylindrically-fusiform. Spire conical. Surface of shell smooth 

 and shining. Suture quite indistinct. Mouth long and narrow, 

 canal very short, represented only by a rounded sinus. Col- 

 umella with four subequal folds. Outer lip thickened, smooth 

 within. Height, ll mm ; diameter, 5 mm ; length of mouth, 6-5 mm . 



Santa Cruz. 



32. Vohda jpetersoni sp. nov. Shell elongated, fusiform. 

 Surface beautifully cancellated by spiral and longitudinal ribs. 

 Spiral ribs strongly developed, equidistant, sharp; longitudinal 

 ribs a little stronger than the spiral ribs, sharp, running from 

 suture to suture, ca. 30 on the last whorl. Cancellations 

 rectangular, about twice as broad as high on the last whorl, and 

 about three or four times as broad on the upper whorls. Spire 

 slender, conical^ mouth not much longer than half of the shell. 

 Upper whorls quite high. Whorls almost evenly convex, only 

 slightly appressed and concave near the suture. Mouth elon- 

 gated. Columellar folds at least two, indistinct. Height, 148 mm 

 (not complete) ; diameter, 65 mm . 



Santa Cruz. 



33. Drillia santacnozensis sp. nov. Shell turrite, subfusi- 

 form. Whorls 8, last whorl hardly half as long as the shell. 

 Whorls convex, but depressed and slightly concave in the 

 upper part near the suture. This depression forms a shallow 

 furrow, following the suture, and is sharply separated from 

 the rest of the whorl, which is ornamented by oblique longi- 

 tudinal ribs, which end abruptly at the sutural depression. 

 These ribs number 12-15 in one whorl. Besides, there are 



