NO. lO AMERICAN SPECIES OF LEPIDOCYCLINA VAUGHAN 53 



Semmes. Fig. 3 is an external view of a specimen, X 10, from the 

 Byram marl of Mississippi, introduced for comparison with the 

 Mexican specimens. 

 Fig. 4. Lepidocyclina favosa Cushman. External view, X 10, of a specimen 

 from the Alazan-Moyutla crossing over the Rio Buena Vista, 

 Canton of Tuxpan, State of Vera Cruz, Mexico, collected by T. W. 

 Vaughan and D. R. Semmes. This figure should be compared with 

 the figures of L. favosa on preceding plates. 



Plate 30 



Fig. I. Lepidocyclina {Nephrolepidina) semmesi Vaughan and Cole, n. sp. Sur- 

 face view, X 10, of a specimen from 0.6 km southwest of Dos 

 Caminos (M106V), near Tantoyuca, Mexico. Compare with 

 plate 32, fig. 3. 



Fig. 2. Lepidocyclina (Nephrolepidina) semmesi var. granosa Vaughan and 

 Cole, n. var. Surface, X 10, of a specimen from east side of 

 Tantoyuca, 50 to 70 feet above bed of arroyo (M96V). 



Plate 31 



Lepidocycli-na {Nephrolepidina) semmesi Vaughan and Cole, n. sp. 

 Figs, i, la. Vertical section, X 20, of a large, microspheric specimen from west 

 side of the creek at Chila Cortaza (M88V). Compare this section 

 with plate ^2, fig. 3, a specimen from 0.6 km southwest of Dos 

 Caminos. 



Plate 32 



Fig. I. Lepidocyclitta (Nephrolepidina) sp. Surface view of a specimen, X 10, 

 from El Contento, Rio Pantepec, State of Puebla, Mexico. This 

 specimen shows blisters over what appear as pits in weathered 

 specimens. This is the same species as that represented by plate 21, 

 fig. 2, and has been identified as L. marginata (Micht). 



Figs. 2, 3. Lepidocyclina (Nephrolepidina) semmesi Vaughan and Cole, n. sp. 

 Fig. 2, vertical section, X 20, of a small, probably megalospheric 

 specimen, from west side of Chila Cortaza Creek (M88V). Com- 

 pare with plate 15, figs. 3-5. Fig. 3, vertical section, X ^5, of a speci- 

 men from 0.6 km southwest of Dos Caminos. This specimen is one 

 of the same lot and similar in every respect to the specimen figured 

 on plate 30, fig. i. Compare it also with the specimen figured on 

 plate 31. Their similarity is obvious. 



