246 UPPER CRETACEOUS-LOWER TERTIARY FORAMINIFERA 



Globorotalia velascoensis velascoensis (Cushman) 

 (PL 20, figs. 3a-d ; PL 21, fig. 3) 



1925 Pulvinnlina velascoensis Cushman : 19, pi. 3, figs. $a-c. 



1926ft Pulvinalina velascoensis Cushman ; Cushman : 608, pi. 21, fig. 9. 



1927a Globorotalia velascoensis (Cushman) Cushman (pars) : 169, pi. 27, fig. 8, ? fig. 7, non 



fig. 9- 

 1928ft Globorotalia velascoensis (Cushman) ; White : 281, pi. 38, figs. la-c. 

 1932 Globorotalia velascoensis (Cushman) ; Cushman & Jarvis : 51, pi. 15, figs. 8a-c. 

 1939c Globorotalia crater Finlay ; Finlay : 29, figs. 157, 162, 163. 

 1946 Globorotalia velascoensis (Cushman) ; Cushman : 153, pi. 63, fig. 6. 



1946 Globorotalia velascoensis (Cushman) ; Cushman & Renz : 47, pi. 8, figs. 11, 12. 



1947 Globorotalia velascoensis (Cushman) ; Subbotina : 123-127, pi. 7, figs. 9-1 1 ; pi. 9, 

 figs. 21-23. 



1949 Globorotalia (Truncorotalia) velascoensis (Cushman) ; Cushman & Bermudez : 41-42, 



pi. 8, figs. 4-6. 

 195 1 Globorotalia velascoensis (Cushman) ; Nakkady (pars) : 54-55, pi. 1, fig. 6. 

 1953 Globorotalia velascoensis (Cushman) ; Hamilton (pars) ; 231, pi. 30, figs. 16-18, (non 



fig. 23), pi. 31, fig. 24, ? fig. 30 (non figs. 28, 29, 31). 

 1953 Globorotalia velascoensis (Cushman) ; Subbotina (pars) : 216-219, pi- I 9> n g s - ia-2C, 



? figs. 3a-4C. 



1955 Truncorotalia velascoensis (Cushman) Dalbiez & Glintzboeckel (in Cuvillier et al.) : 533, 

 pi. 2, figs. 8a-c. 



1956 Globorotalia velascoensis (Cushman) ; Haque : 181-182, pi. 24, figs. 2a, ft. 

 l 957b Globorotalia velascoensis (Cushman) ; Bolli : 76-77, pi. 20, figs. 1-3, ? fig. 4. 



1957a Globorotalia velascoensis (Cushman) ; Loeblich & Tappan : 196-197, pi. 64, figs. ia-2c. 



1957 Globorotalia velascoensis (Cushman) ; Sacal & Debourle : 64, pi. 29, figs. 7-9. 



1958 Globorotalia crater Finlay ; Hornibrook : 33, pi. 1, figs. 3-5. 



J 959 Globorotalia velascoensis (Cushman) ; Hamilton & Rex : 794, pi. 252, figs. 18-20. 

 i960 Globorotalia velascoensis (Cushman) ; Bolli & Cita : 31-32, pi. 33, figs. ja-c. 

 1961 Globorotalia velascoensis (Cushman) ; Said & Kerdany : 330, pi. 1, figs, ioa-c. 

 ? 1962 Globorotalia (Truncorotalia) velascoensis velascoensis (Cushman) ; Hillebrandt : 139, 

 pi. 13, ? figs. 16, 17 ; non figs. 18-21. 

 1963 Globorotalia velascoensis (Cushman) ; Aubert (pars) : 53-54, pi. I, figs. la-c. 



Description. (Described specimen PL 20, figs 3<z-d). Test large, planoconvex, 

 umbilico-convex, coiled in a very low trochospire ; dorsal side flat, ventral side 

 strongly protruding ; equatorial periphery subcircular, lobate, with a distinct, 

 broad, delicately beaded keel ; axial periphery angular, distinctly acute ; chambers 

 on the dorsal side 16, arranged in 2.\ sinistrally coiled whorls ; the initial ones are 

 small, globigerine, compressed and are followed by typically crescentic chambers 

 which increase slowly in size ; the last whorl is composed of 6 large, nearly crescentic 

 to roughly quadrangular chambers which increase moderately in size ; on the ventral 

 side the chambers are 6, large, angular conical and strongly protruding, with a 

 papillose everted collar decorating their distal ends and surrounding the umbilicus ; 

 sutures on the dorsal side curved, slightly raised and delicately beaded ; on the ven- 

 tral side they are straight, radial and strongly depressed ; umbilicus roughly hexago- 

 nal in outline, wide, deep, open and surrounded by a thick beaded, everted collar, 

 aperture a low arch, interiomarginal, extraumbilical-umbilical, with a narrow, 

 delicate lip ; wall calcareous, finely perforate ; surface smooth, except for the keel, 

 dorsal sutures and umbilical collar, which are distinctly papillose. 



