EXPLANATION OF PLATE 10 



Fig. 1. Tellina tenuilineata, n. sp. A plaster-of-paris mould from an im- 

 pression in the rock. No. 11128, Coll. Invert. Palae. Univ. Calif., loc. 1175. 

 Natural size. 



Fig. 2. Pitaria lorensana, n. sp. Type, no. 11129, Coll. Invert. Palae. Univ. 

 Calif., loc. 1131. Natural size. 



Fig. 3. Tellina tenuilineata, n. sp. Type, no. 11130, Coll. Invert. Palae. Univ. 

 Calif., loc. 1131. View of right valve, with posterior end broken, natural size. 



Fig. 4. Pitaria lorenzana, n. sp. Same specimen as fig. 2, showing view of 

 dorsal areas, natural size. 



Fig. 5. TcMina tenuilineata, n. sp. An imperfect specimen showing the 

 posterior half of a right valve. No. 11131, Coll. Invert. Palae. Univ. Calif., loc. 

 1131. Natural size. 



Fig. 6. Solen (Plectosolen) curtus Conrad. No. 11132, Coll. Invert Palae. 

 Univ. Calif., loc. 1131. Natural size. 



Fig. 7. Solen gravidas, n. sp. Type, no. 11133, Coll. Invert. Palae. Univ. 

 Calif., loe. 1131. Left valve, natural size. 



[ 206 ] 



