INSTITUTE OF SCIENCE, PHILADELPHIA. 347 



Specimen is so broken that I prefer to await better material before trjnng to 

 figure it. 



Beside the species previously alluded to, Delpliinula lipara H. C. Lea {op. 

 cit. p. 261, pi. 36, fig. 71, 1845) is, from the type, an Adeorbis much like the 

 recent A. sincera Dall ; A. 7iautiliformis Holmes is a Cochliolepis very similar 

 to C. parasiticus ; A. lyra (Zo\\'Cd^'A\s, di Fossarus ; A. simplex Gabb seems to 

 be a good species from the Costa Rica Pliocene ; Adeorbis carinata Gabb, of 

 the Santo Domingo Miocene, is an Episcynia close to imilticarinata Stm. ; 

 Vitrinella obliquistriata Gabb is probably identical with the Delpliinula of the 

 same name described by H. C. Lea; both are referable to Adeorbis or Mdl- 

 leria ; V.crassicosta Gabb is also probably an Adeorbis ; Adeorbis qiiadrangii- 

 laris Meyer (Senck. Ber. 1886, p. 4, t. i, fig. i) is an Ethalia, and so is A. sub- 

 angulatus, both from Jackson, Miss., Eocene. A. IcBvis (called A. brevis by Gre- 

 gorio) of the same author (Ala. Geol. Surv., Bull, i , p. 67, 1 886), from Red Blufif 

 Eocene, closelj^ resembles A. lipara. Sola)-ium delphinuloides Meyer (1887), 

 lion Heilprin (1880), from the Jacksonian, appears to be synonymous with 

 Adeorbis exacua Conrad. In the same publication Meyer refers the Teino- 

 stoma rotula Heilprin to Delpliinula depressa Lea as a synonym, and refers 

 the species to Adeorbis. I have not compared the types, but it is obvious from 

 Lea's description that the shell is not an Adeorbis, but an Ethalia or some- 

 thing related to that genus. Aldrich records it from the Bell's Landing and 

 Lisbon horizons in Alabama. De Gregorio figures from the Claibornian a 

 doubtful A. incertus, an A. pignus, which should be an Ethalia, and an A. piinc- 

 tiformis (diam. 0.5 mm.) which must be regarded as a doubtful .species, if not a 

 C(Bcuni in its planorboid stage. He also proposes a subgenus Asiolns for the 

 two species last mentioned, which shares the uncertainty of their characters. 



Family ASSIMINIID/E. 



Genus ASSIMINBA Leach. 



Assiminea aflBnis Orbigny. 



Paludestrina affinis Orb., Moll. Cuba, ii. p. 8, pi. x. fig. 8, 1S42 ; Dall, Bull. U. S. Nat. 



Mus. No. 37, p. 150, No. 864, 1889. 

 Cingula? concinnaC B. Adams, Contr. Conch., p. 70, 1850. 



Older Miocene of the Chipola beds, Calhoun County, Fla., Burns; Plio- 

 cene of the Caloosahatchie and Shell Creek, Dall and Willcox ; living in the 

 Florida Keys and the West Indies. 



This species is extremely rare in the marls. 



Assiminea Auberiana Orbigny. 



Paludestrina Auberiana Orb., Moll. Cuba, ii. p. 8, pi. x. figs. 6, 7, 1842 ; Dall, Proc. U. S. 



Nat. Mus. vi. p. 335, 18S3. 

 P/iasianetta concolor C. B. Adams, Contr. Conch., p. 68, 1850. 



Pliocene of the Caloosahatchie and Shell Creek; living on the west coast 

 of Florida and in various parts of the Antilles. 



