EXPLANATION OF PLATE XXXIII. 
SAN LORENZO (OLIGOCENE) FOSSILS. 
Fie. 1. Tellina lorenzoensis, new species, plastotype, Cat. No. 165439, U.S.N.M. 
Right valve; length, 40 mm. X 1. Locality No. 115, branch of south 
fork of Waddell Creek, 14 miles northwest of Eagle Rock, p. 367. 
2. Plewrotoma newsomi, new species, plastotype, Cat. No. 165440, U.S.N.M. 
Back view of wax cast; altitude, 19 mm. X 2. Locality No. 108, on 
road on divide between headwaters of Waddell Creek and Boulder 
Creek, 1 mile north of Hagle Rock, p. 368. 
3. Fusus sanctecrucis, new species, plastotype, L.S.J.U., No. 1037. Aperture 
view of cast of imperfect and decorticated specimen; altitude, 
43 mm. X 1. Locality No. 109, on Bear Creek, 4 miles above its 
confluence with the San Lorenzo River, p. 372. 
4. Turcicula santacruzana, new species, type, Cat. No. 165442, U.S.N.M. 
Front of imperfect specimen; altitude, 36 mm. X 1. Locality No. 
100, on San Lorenzo River, 3 miles above Boulder Creek, p. 373. 
5. Cidaris branneri, new species, plastotype, L.S.J.U., No. 1056. Lateral 
view of wax cast of nearly perfect specimen; length, 20 mm. X 2. 
Locality No. 109, same as fig. 3, p. 363. 
6. Cardium cooperi Gabb, var. lorenzanum, new variety, type, Cat. No. 
165444, U.S.N.M. Right valve; altitude, 13 mm. X 2. U. S. Geolog- 
ical Survey locality No. 4063, Porter, Washington, p. 366. 
7. Pleurotoma sdanctecrucis, new species, plastotype, Cat. No. 165445, 
U.S.N.M. Cast from imperfect mold; altitude, 8.5 mm. X 2. Locality 
No. 108, same as fig. 2, p. 369. 
8. Fusus hecoxri, new species, type, Cat. No. 165446, U.S.N.M. Back view 
of imperfect specimen; altitude, 85 mm. X 1. Locality No. 100, 
same as fig. 4, p. 371. 
9. Malletia chehalisensis, new species,: type, Cat. No. 165447, U.S.N.M. 
View of exterior of right valve; length, 7.5 mm. X 3. U. S. Geolog- 
ical Survey locality No. 4063, Porter, Washington, p. 365. 
9a. Same species and specimen as fig. 9; view of interior. 
10. Architectonica lorenzoensis, new species, plastotype, Cat. No. 165448, 
U.S.N.M. Top view of wax cast of nearly perfect specimen; maxi- 
mum diameter, 11 mm. X 2. Locality No. 107, on small ravine off 
Boulder Creek, 24 miles north of Hagle Rock, p. 374. 
11. Lirofusus ashleyi, new species, type, Cat. No. 165449, U.S.N.M. Back 
view of nearly perfect specimen; altitude, 12.5 mm. X 2. Locality 
No. 100, same as fig. 4, p. 372. 
12. Strepsidura californica, new species, type, Cat. No. 165450, U.S.N.M. 
Back view of nearly perfect specimen; altitude, 88 mm. X 1. Local- 
ity No. 108,-on Kings Creek, one-half mile above its confluence with 
the San Lorenzo River, p. 370. 
13. Pleurotoma perissolaxoides, new species, plastotype, Cat. No. 165451, 
U.S.N.M. Back view of wax cast of nearly perfect specimen; alti- 
tude, 12.5 mm. X 2. Locality No. 107, same as fig. 10, p. 368. 
-14. Aturia ziczac Sowerby, L.8.J.U. No. 1089. Fragment of specimen show- 
ing suture lines; altitude of fragment, 27 mm. X 1. This species re- 
sembles a small pearly Nautilus. Locality No. 91, on Bear Creek, 
one-half mile north of its confluence with Bear Creek. 
15. Nucula (Acila) dalli, new species, plastotype, Cat. No. 165452, U.S.N.M. 
Wax cast of left valve; length 35 mm. X 1. Locality No. 115, same as 
fig. 1, p. 364. 
16. Dentalium substriatum Conrad, Cat. No. 165453, U.S.N.M. Lateral view 
of fragment; altitude, 12 mm. X 2. Locality No. 100, same as fig. 4. | 
17. Haminea petrosa Conrad, Cat. No. 165454, U.S:N.M. Back view of 
wax cast of slightly imperfect specimen; length, 7 mm. X 3, Lo- 
cality No. 107, same as fig. 10. 
