1922] Packard: New Species from Santa Ana Mountains 431 



Genus APORRHAIS Da Costa 

 APORRHA1S VETUS, n. sp. 

 Plate 36, figure 1 



Type specimen 12298, Coll. Invert. Palae., Univ. Calif., loe. 2171. 



Shell medium sized, spire high; whorls six or seven; spire whorls convex, 

 regularly curved above and below; suture rather shallow; body whorl large, 

 probably with a short canal; outer lip broadly expanded; margin concave below, 

 terminating in a blunt point at the end of a ridge which originates at the middle 

 of the body whorl. Upper margin of lip extends in an even concave curve 

 nearly to the top of the spire; outer posterior margin of the lip is thickened 

 along the margin of the spire; whorls of the spire ornamented by 8 to 12 trans- 

 verse ribs and by fine spiral lines; these ribs extend only to the body whorl, 

 which appears to be unornamented except for the angulation that terminates 

 at the apex of the lip. Length of type, 28+ mm.; diameter of body whorl, 

 15 mm.; length from the middle of the body whorl, 18 mm. 



Horizon. — Chico group, zonal position uncertain. 



Family Buccinidae 

 Genus SIPHONALIA A. Adams 



SIPHONALIA DUBIUS, n. sp. 

 Plate 35, figure 5 



Type specimen 12304, Coll. Invert. Palae., Univ. Calif., from the Chico of 

 the Santa Ana Mountains, California. 



Shell medium size, rather broad; four whorls, those of the spire being orna- 

 mented by about ten heavy transverse nodes, which are more prominent on the 

 strongly convex portion of the whorl, becoming obsolete above and below the 

 suture; spire also ornamented by ten rows of nodes that become less conspicuous 

 below, and by about 15 heavy spiral ridges; outer lip thin; aperture ovate; canal 

 probably short. Height of type, 38 mm.; diameter of body whorl, 22 mm. 



Horizon. — Chico group, exact locality and zonal position unknown. 



Family Thaisiidae 

 Genus LYSIS Gabb 

 LYSIS CALIFORNIENSIS, n. sp. 

 Plate 37, figures 2 and 3 

 Type specimen 12287, Coll. Invert. Palae., Univ. Calif., loc. 2167. 

 Shell with three whorls, each succeeding one increasing rapidly in size; body 

 whorl very tumid, slightly flattened on the upper part, and becoming more so 

 on the broadly expanded lip; spire low, whorls tumid, nearly evenly rounded 

 above and below; suture impressed; aperture large, oval; shell imperforate; 

 surface apparently without ornamentation, but somewhat roughened by irregular 

 lines of growth. The cast of one specimen shows spiral lines suggestive of a 

 spiral sculpture. Height of type, 27 mm. 



