1915] 



Kew: Eehinoids of San Pablo Group 



367 



Relationships op the San Pablo Echinoids 



Astrodapsis tumidus 



(large form). 



Astrodapsis tumidus 



(small thick form). 



Scutella gabbi 



(notched form). 



Astrodapsis whitneyi Remond 



Astrodapsis altus, n. sp 



Scutella pabloensis, 

 n. sp. 



Scutella gabbi, ' 

 n. var. tenuis. I 



Astrodapsis tumidus Remond. 



Astrodapsis tumidus, 

 n. subsp. cierboensis. 



Scutella gabbi Remond. 



Scutella (?) breweriana Remond. 



Description op Species 



SCUTELLA GABBI Remond 



Plate 39, figures 1, 2, 3 



Scutella gabbi Remond, Proc. Calif. Acad. Sci., vol. 3, p. 53, 1863-1867. 

 Scutella gabbi Remond. Gabb, Geol. Surv. Calif., Palaeontology, vol. 2, p. 



36, pi. 12, figs. 64 and 64a, 1869. 

 Scutella gabbi Remond. Merriam, Proc. Calif. Acad. Sci., Ser. 3, Geology, 



vol. 1, no. 5, p, 168, pi. 22, figs. 5 and 5a, 1899. 



Variations. — The size is usually small, but a large form is found in 

 the basal beds in the San Pablo Bay section (pi. 39, fig. 2). Another 



