NO. 1545. NEW FOSSIL MOLLUSKS FROM CALIFORNIA— ARNOLD. 537 



Dlnien8i(ms. — Of imperfect and distorted type; longitude, 71 mm.; 

 latitude, 40 mm. ; body whorl, 54 mm. 



Notes. — This variety differs from the typical form by its longer, less 

 recurved canal and much less pronounced sculpture. Named after the 

 city of Los Angeles, the type locality. 



Type.—Q^t. No. 164975^ U.S.N.M. 



Locality. — Third Street tunnel, Los Angeles, California. (Homer 

 Hamlin.) 



Horizon. — Lower Pliocene, probably equivalent of middle Fernando 

 formation. 



MUREX ELDRIDGEI, new species. 

 Plate I., fig. 12. 



Description. — Shell broadly fusiform; spire elevated; apex sub- 

 acute; whorls four, exceedingly convex and ornamented b}^ six prom- 

 inent convex varices, which cross the whorl diagonally sloping forward 

 up from the base of the whorl to the suture, and each being appressed 

 against the analogous varix of the antecedent whorl in such a way as 

 to give the connected varices a left-handed spiral arrangement, sloping- 

 backward down and across the whorls; varices extend full length of 

 body whorl. Surface of whorls and varices ornamented with two or 

 three (six on body whorl) raised lines, between which are finer, more 

 or less beaded raised lines. Suture between the varices deeply im- 

 pressed, forming pits. Aperture pyriform, narrowing into short, 

 straight canal below; lips smooth. 



Dimensions. — Altitude, 24 mm.; latitude, 15 mm.; body whorl, 20 

 mm.; aperture, 15 mm. 



Notes. — This species is closely allied to Murex incisus Broderip, but 

 is distinguishable from the latter by its broader form, narrow col- 

 umella, and simple varices which do not have posteriorly reflexed 

 serrate varices over the sutural pits. Named in honor of the late 

 George Romans Eldridge, of the United States Geological Survey. 



Type.—C2it. No. 164955, U.S.N.M. 



Localiiy. — Elsmere Canyon, near Union Oil Coinpany's wells, 2^ 

 miles southeast of Newhall, Los Angeles County, California. (Ralph 

 Arnold.) 



Horizon,. — Middle Fernando formation (lower Pliocene). 



NASSA HAMLINI, new species. 



Plate L, fig. 9. 



Description. — Shell about 15 mm. in length, bluntly conical; spire 

 elevated; apex blunt; whorls five or six, quite convex and crossed by 

 several (on the l)ody whorl 12) rather sharp narrow ridges between 

 which are wide interspaces; spiral sculpture consists of four equal, 



