AuG. 19, 1923 VAUGHAN: STRATIGRAPHY OF THE VIRGIN ISLANDS 313 
Mollusea: 
Turritella sp. 
Ostrea sp., probably O. haitiensis Sowerby. 
Pecten sp., close to P. ventonensis Cooke and P. soror Gabb but apparently 
different from both. * 
Spondylus sp. 
“Lucina”’ sp. 
Teredo sp., like Kuphus incrassatus Gabb. 
Geologic correlatton.—That the rocks from which the fossils obtained 
at Station 8654 are not older than Miocene is shown by the presence 
of Solenastrea bournoni; while the oysters and the Pecten indicate that 
they are as old as Miocene. | 
Eastern Porto Rico 
On the north side of the road from Fajardo to San Juan, about 5 
kilometers east of Rio Piedras, there is a low hill composed of argil- 
laceous, yellowish limestone. The following fossils were collected here: 
Station 8653. Porto Rico, 5 kilometers east of Rio Piedras, north 
side of road from San Juan to Fajardo. Collected by T. W. Vaughan. 
Foraminifera: 
2 Asterigina sp. 
1 Orbitolites sp. 
1 Orbiculina sp. 
1 Quinqueloculina sp. 
Madreporaria: 
Pocillopora sp., apparently new species related to P. crassoramosa Duncan. 
Siderastrea sp., apparently new species. 
1 Porites sp. or Goniopea sp., of the growth form of Goniopora clevei, 
Vaughan. 
2 Porites sp. aff. P. astreoides Lamarck 
Porites sp. 
Bryozoa: 
1 Holoporella albirostris Smitt. 
Mollusca: 
1 Teredo sp., like Kuphus incrassatus Gabb. 
Geologic correlation.—Hither uppermost Oligocene or very low 
Miocene. The forms whose names are preceded by ‘‘1”’ are known in 
deposits of both upper Oligocene and lower Miocene age; those pre- 
ceded by “‘2” are not known at a horizon below Miocene. 
Summary statement on deposits of Tertiary age.—In the foregoing 
remarks it has been stated that deposits of middle Oligocene (Rupelian) 
and probably upper Oligocene (Aquitanian) age occur in Saint Croix 
and that deposits of lower Miocene (Burdigalian) age occur probably 
in Saint Croix, certainly in Vieques, and probably on the north side of 
