ILLUSTRATIONS 
[The plates of Vigo and Malumbang fossils are from photographs made by Mr. E. Cortes, 
chief photographer, Bureau of Science, and retouched, by comparison with the speci- 
mens, by Mr. Pio Moskaira, chief of drafting section, division of mines, Bureau of Science.] 
PLATE 1. MEsSozoIc JuRASSIC (7?) RADIOLARIA 
Fic. 1. Thin section of old “slate” of probable Jurassic age, containing 
Radiolaria; « 100. 
2. Highly magnified portion of same thin section; x 200. After W. 
D, Smith, Philip. Journ. Sci. § A 8 (1918). 
PLATE 2. Vico Group, MIOCENE 
All fossils figured on this plate were collected from Vigo group, Canguinsa 
formation, Bondoc Peninsula, Tayabas Province, Luzon. 
Fic. la. Architectonica pictum (Philippi), top view; x 2. Locality 4x. 
This species is living in Philippine seas at present. 
1b. Architectonica pictum (Philippi), bottom view of a small speci- 
men; X %. Locality 8x. 
2. Actaeon reticulatus K. Martin; x %. Locality 3x. An extinct 
form. 
8. Cancellaria crenifera Sowerby; X 44. Locality 2x. A_ living 
species. 
4. Cerithium sp. nov. (2); x 1. Locality 3x. 
5. Cerithium sp.; x 2. Locality 4x. 
6. Cerithium bandongensis K. Martin; x 2. Locality 4x. The type 
of this species was collected from upper Miocene beds near 
Bandong, Java. It is probably a good guide fossil for the Vigo 
group. 
7. Cerithium jenkinsi K. Martin; x 5. Locality 38x. This is an ex- 
tinct species which is possibly characteristic of the Vigo group. 
8. Cerithiwm moniliferum Kiener; X 56. Locality 3x. This species 
is found on the Philippine beaches of the present. 
9a. Cerithium herklotsi K. Martin; X 1. Locality 8x. This figure 
illustrates a mature individual whose body whorl is almost 
smooth in contrast with the upper whorls of the spire. 
9b. Cerithium herklotsi K. Martin; X %. Locality 3x. In a young 
individual the nodose body whorl is a youthful character, as our 
collections contain a striking series which directly connects 
this development stage with the mature individual. 
10. Cerithidea, cf. quadrata Sowerby; X 5. Locality 11x. 
11. Conus ornatissimus K. Martin; X 1. Locality 3x, Bahay River, 
Bondoc Peninsula, Luzon. This beautiful extinct species is 
probably a guide fossil of the Vigo Miocene. 
12. Conus lividus Hwass; X 1. Locality 2x. This beautiful cone is 
still living in Philippine waters. o03 ° 
