Vol. 5] 



Weaver 



. — New Echinoids. 



27:! 



SCUTELLA PEKKINI, a. sp. 

 PI. 22, fig. 2. 



The outline of the test from above is circular to elliptical. 

 The upper surface is very slightly arched and the margin of the 

 test is moderately thin. The apical system is excentric and small. 

 The ambulacral petals are rather broad, sometimes very slightly 

 elevated, open at the ends, and extending to within a short dis- 

 tance of the margin. The poriferous zone is about two-thirds 

 as broad as the enclosed ambulacral space. The anal pore is 

 marginal. 



The lower surface of the test is slightly concave. Faint 

 undivided ambulacral grooves pass from the mouth to the mar- 

 gin. The tubercles are of the same size on the upper and lower 

 surfaces. 



Scutella perrini differs from Scutella breweriaiia in that the 

 petals are of uneven length and the apical system excentric, 

 while in 8. breweriana the apical system is central. The test 

 of S. perrini also reaches greater size than is known in S. brew- 

 eriana. 



Dimensions : Maximum width 40 mm. ; maximum length 45 

 mm. ; maximum thickness 6 mm. 



Occurrence: In beds presumably of Miocene age near Coal- 

 inga, California. Other specimens closely resembling this form 

 have been found at San Gregorio, California, in the Purisima 

 formation. 



LlNTinA( ?) CALIFOENIGA, n. sp. 

 PI. 21, fig. 2. 



The outline of the test from above is elliptical. The anterior 

 groove is deep. The apical system is small and situated slightly 

 anterior to the center. The central portion of the lateral inter- 

 ambulacral plates forms a series of irregular ridges extending 

 from the apical system to the margin. The posterior interam- 

 bulacral area is elevated. The three anterior ambulacra are 

 nearly equal in size and larger than the posterior areas as far 

 as known. The poriferous zones of the ambulacra are narrow, 

 but the pores are large. The specimen is a poorly preserved cast 



