296 BULLETIN 106, UNITED STATES NATIONAL, MUSEUM. 



The bibliography of this species is somewhat confused. Cribrilina innominata 

 Couch, 1844, is a distinct species, as was established by Neviani in 1900 and by 

 Norman in 1909. We have done away with the old synonyms. 



According to Neviani, Cribrilina raricosta Reuss, 1874. is a good variety, recog- 

 rizable by its very small dimensions. 



There is one variety which has a frontal ascopore, namely, Lepralia innominata 

 Busk, 1859, or Lepralia, scripta Manzoni, 1870, which we have not included in the 

 preceding bibliography. However, according to Norman, it is subject to great 

 variation, and, awaiting agreement among the zoologists, it has not been made a 

 distinct variety. 



To these varieties we add two others, anaticula and carolincnsis. 



The characteristics of the typical form of the species are: First, the aperture 

 is semilunar and surrounded by four or five large spines. Second, the ovicell is 

 keeled in front and always closed by the operculum. Third, the very long, inter- 

 zooecial avicularium is terminated by a very thin little canal. 



The number of costules, in the recent specimens, is generally from 16 to 18. 

 In the fossil forms their number is from 10 to 12. It is impossible to establish a 

 variety upon this difference, for the costular variations in this species are extraor- 

 dinary. 



Certain specimens have very prominent costules; on others they are scarcely 

 visible. 



The ancestrula is a zooecium of the Membranipore type, surrounded with spines 

 (figs. 16, 17). 



The micrometric measurements are useless, for they are too variable. 



Occurrence. Middle Jacksonian: Wilmington, North Carolina (common); 

 near Lenuds Ferry, South Carolina (common) ; Eutaw Springs. South Carolina 

 (common) ; 3^ miles south of Perry, Georgia (Common) ; 18 miles west of Wrights- 

 ville. Johnson County, Georgia (common). 



Upper Jacksonian (Ocala limestone) : Chipola River, east of Marianna, Jack- 

 son County, Florida (common). 



Vicksbui-gian (Marianna limestone) : One mile north of Monrooville, Alabama 

 (common) ; Salt Mountain, 5 miles south of Jackson, Alabama (rare) ; 3 miles south- 

 east of Vosburg, Jasper County. Mississippi. 



Geological distribution. In Europe Puellina radiata is found in all the forma- 

 tions since the Lutetian. 



Habitat. The living form is cosmopolitan in the two hemispheres. It has 

 been found in the Atlantic at Madeira, Florida, France, and the British Isles; 

 in the Indian Ocean at Zanzibar : in the Pacific at the Philippine Islands, Australia, 

 and Tahiti; and in the Mediterranean, France, Algeria, Tunis. Italy, and the 

 Adriatic. 



Specimens have been dredged to a depth of 180 meters, but they live habituallv 

 near the shores in the shallower waters. Its occurrence in the Priabonian of the 

 Vicentin and in the waters of Madeira renders its presence inevitable in the Ameri- 

 can Upper Eocene. 



Plcshfypes.Cut Nos. 64022-64024, U.S.N.M. 



