1916] 



Dickerson: Tejon Eocene of California 



495 



MITRAMORPHA PARSONSI, n. sp. 

 Plate 38, figure 11 



Shell fusiform, with spire almost as long as body-whorl ; whorls 

 eight, the first three being smooth ; the other whorls strongly 

 cancellated by rounded elongated varices. Eigbt varices are found 

 on fourth whorl, seven on the fifth, six on the sixth and seventh, and 

 four on the body-whorl. The spire-whorls except the first three are 

 distinctly shouldered about a third of the distance below the sinuous, 

 linear suture. The space between the apex and shoulder of these 

 whorls is covered by two or three small spiral threads, while the space 

 below the shoulder is decorated by two to four spiral lines with 

 intercalary threads. These spiral lines number about twenty on the 

 body-whorl. Mouth elongate-oval ; outer lip thickened ; inner lip 

 marked by six plaits, the uppermost being the strongest. 



Named in honor of Mr. Benjamin Parsons, some time field geolo- 

 gist, Southern Pacific Company. 



Dimensions. — Length, 12 mm. ; width of body-whorl, 4.5 mm. 



Occurrence. — University of California Locality 672. 



MUREX (OCINEBRA) NASHI, n. sp. 

 Plate 41, figures 7a, 7b 



Shell short, with small spire and large body-whorl ; nucleus small, 

 smooth, of three whorls ; remaining four whorls decorated by very 

 prominent sculpture, consisting of twelve to fourteen equally spaced, 

 thick lamelliform varices, which are thick, sharp and spinose at the 

 intersection of the spiral ribs, especially prominent at the shoulder; 

 spiral sculpture of spire consists of four rounded cords between suture 

 and shoulder; shoulder is marked by a larger spiral cord, below which 

 are two or three more spiral cords similar to the ones above the 

 shoulder ; interspaces linear. All the cords tend to form spines upon 

 crossing the varices. The body-whorl is similarly decorated except 

 that there are four major spiral cords below the shoulder, the upper 

 two being most prominent. Two minor cords are found between the 

 major. Aperture ovate ; canal short, wide and recurved ; outer lip 

 with five or six coarse lirae within ; inner lip covered by a thin colu- 

 mellar fold. 



Named in honor of Mrs. Louise Nash, whose excellent drawings 

 have aided work in palaeontology. 



Dimensions. — Length, 12 mm. ; diameter, 8 mm. 



