GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 141 



of same, 10.9 mm. ; greatest diameter of fixed finger near its base, 

 f>.5 mm. ; least diameter of same, 4.2 mm. 



Holotype and paratypes. In the material included by Mr. Brown 

 and Dr. Pilsbry under C. scottl are specimens of three species; two 

 of these species were figured with the original description ; the larger 

 species illustrated l by figures 1 and 3, plate 22, is chosen to bear the 

 name scotti, and the original of figure 1 may be designated as the 

 type-specimen, as it is free from the matrix and shows more of the 

 characteristic granulation than does the original of figure 3, which 

 is furnished with a propodal finger, but is half embedded in a matrix. 

 It also shows, although roughly, a row of 5 pits on the upper margin ; 

 this row, however, slopes downward a little distally on to the inner 

 surface. The greatest height of the type is 27 mm., length at level of 

 sinus between fingers, 28 mm. 



Still a third specimen, also a left manus, was taken at the same 

 place ; the surface is much worn, but the proximal angles are well de- 

 fined. The type-locality is in the lignitic layers, about 65 feet below 

 the base of the Pecten bed at Tower N.. Las Cascadas section, Gail- 

 lard Cut; Prof. W. B. Scott, collector, 1911. Type, Cat. No. 2259, 

 Mus. Acad. Xat. Sci., Philadelphia. 



The hand mentioned by Brown and Pilsbry, 2 as collected by W. M. 

 Gabb in Costa Rica, apparently belongs to C. scotti. It shows well 

 the upper marginal row of pits, numbering 7, which drops distally 

 on to the inner surface. The specimen is labeled "Miocene." Cat. 

 Xo. 2255, Mus. Acad. Xat. Sci., Philadelphia. 



CALLIANASSA CRASSIMANA, new species. 

 Plate 61, figs. 15-17. 



Type-locality. Panama Canal Zone. Las Cascadas section. Gail- 

 lard Cut. From lowest fossiliferous bed, third bed below lowest 

 limestone beds separated by rows of nodules. Lower part of upper 

 half of Culebra formation. Oligocene series. D. F. MacDonald 

 and T. W. Vaughan, collectors. 1911. Station 60200. 



Measurements. Distal height of palm, 22 mm. ; thickness of palm, 

 at least 7.7 mm. ; length of crenulated lobe bordering dactylus, 10.2 

 mm.; upper length of dactylus (tip broken off), 18 mm.; greater 

 diameter at the break near the tip, 1.7 mm. ; lesser diameter at same 

 point, 1.3 mm. ; greater diameter at a break about middle of finger, 

 3.8 mm. ; lesser diameter at same point, 2.8 mm. 



Holotype. Cat. Xo. 324273, U.S.X.M. A portion of the distal end 

 of the left manus with the propodal finger attached ; embedded in a 

 nodule. This must have been a very large specimen. The oblique 



1 Proc. Acad. Nat. Sic., Phlla., vol. 64, 1913, p. 503 Idem, p. 504. 



