NO. lO AMERICAN SPECIES OF LEPIDOCYCLINA VAUGHAN II 



LEPIDOCYCLINA (LEPIDOCYCLINA) MEINZERI Vaughan, n. sp. 

 Plate 3, figs. I, 2; plate 4. figs, i, 2c, 3, 4, 5 



Test selliform ; because of the downward bending of the margins 

 on four sides a horizontal section through the embryonic chambers 

 has the outline of a four-pointed star (pi. 4, figs. 2c and 3). Diagonal 

 diameter 5.5 mm. On the surface there are a few thick papillae or 

 pustules. 



The embryonic apparatus is large ; it consists of two chambers, one 

 somewhat larger than the other, separated by a slightly curved wall, 

 but as one chamber does not embrace the other, I am referring the 

 species to Lepidocyclina s.s. The greater diameter of the apparatus 

 is about 950 jx ; lesser diameter about 760 {x. There is on each side of 

 the larger chamber a long narrow chamber which extends beyond the 

 wall separating the two inner chambers and laps on the sides of the 

 smaller chamber. 



The equatorial chambers have curved outer walls and pointed inner 

 ends. They greatly increase in height toward the periphery. 



The lateral chambers form six or seven layers on each side of the 

 equatorial layer, but decrease in number toward the periphery. At 

 the actual margin of the test, the equatorial layer appears to be 

 without cover. In some places tiers are definite, but in other places 

 they are indefinite. The walls are rather thick, and in places ir- 

 regularly distributed thick pillars are developed. 



Localities mid geologic horizon. — The cotypes are the three speci- 

 mens illustrated on plate 4, figures i, 2c, 3, and 4. These are from 

 United States Geological Survey locality no. 7522, south side of 

 Mogote Peak, altitude about 375 feet above sea-level, specimens in 

 place and in drift, collected by O. E. Meinzer. In the same thin 

 section there are Discocyclina piistidata (Cushman), Aster ocyclina 

 sp., and Lepidocyclina novitasensis Vaughan. L. meinseri was also 

 collected at Nuevitas, Cuba, by A. C. Spencer, where it is associated 

 with Discocyclina piistidata (Cushman), Lepidocyclina novitasensis 

 Vaughan, L. subratdinii Cushman, and L. perundosa Cushman. The 

 horizon is clearly Eocene, probably upper Eocene, but the evidence is 

 not conclusive as to horizon within the Eocene. 



Discussion. — L. meinseri bears some resemblance to L. perundosa 

 Cushman, which seems to belong to the subgenus Nephrolepidina. 

 A figure of L. perundosa is introduced for comparison (pi. 4, fig. 6). 

 In L. perundosa the lateral chambers are depressed and the strong 

 pillars of L. meinseri seem to be absent. Furthermore, in L. meinseri 



