TRANSACTIONS OF WAGNER 

 960 



TERTIARY FAUNA OF FLORIDA 



Subgenus AZOR Leach. 



Azor Leach (MS.), Brown, Rec. Conch. Gt. Brit., ed. ii., p. 113, 1844. Sole ex. Solen 

 antiquatus Pulteney; Gray, P. Z. S., 1847, P- l8q; List Brit. An., Moll., p. 62 (not 

 P- 35). J8.SI ; Leach, Synops. Brit. Moll., p. 264, 1852; Morch, Cat. Yoldi, ii., p. 8, 

 1853 ; Fischer, Man. de Conchyl., p. 1 107, 1887. 



The genus Psaininosolen was proposed by Risso, but the name by some 

 accident of proof-reading was printed as Psaininobia, an error corrected in 

 the index of the next volume, printed during the same year. Macha Oken 

 is frequently quoted as printed in his Lehrbuch der Zoologie in 1815, but the 

 name does not appear in that work and I have not been able to trace it earlier 

 than 1835. It formed one of the sections of Blainville's Solccurtus, and 

 appears under the name of Adasius in Gray's edition of Leach's Synopsis. 

 It is a Sfflen with short shell, with subcentral umbones, partially naked soft 

 parts and, in the typical section, a curious oblique or angular surface sculpture 

 superimposed upon the concentric incremental lines and not in harmony with 

 them. In the group typified by Solen antiquatus, the shell, otherwise very 

 similar, has only the incremental sculpture. In some of the species of Psam- 

 mosolen the angular sculpture is obsolete, and these could hardly be separated 

 from Azor except for certain differences alleged to exist in the soft parts. 

 The name Azor was first published by Brown in his synonymy in 1844, in 

 1847 an d 1851 was used by Gray for a species of Psamuwbia, but appeared 

 with its original significance in Gray's edition of Leach's Synopsis in 1852. 



Peammosolen vicksburgensis Aldrich. 



Solecurtus vicksburgensis Aldrich, Cincinnati Journ. Nat. Hist., July, 1885, p. 145, pi. 2, 



fig. i. 

 Macha vicksburgensis Aldrich, Bull. Ala. Geol. Surv., No. i, p. 37, pi. 2, fig. i, 1886. 



Oligocene of the Vicksburgian horizon at Vicksburg, Mississippi ; of the 

 Chipolan on the Chipola River, Florida, and of the Bowden beds, Jamaica. 



The species of this group are variable and all very similar in general ap- 

 pearance. The incised lines vary in strength with the individual, and are 

 sharper and closer together in the young than in the adult. While I cannot 

 be absolutely certain that the specimens from the Chipolan horizon are specifi- 

 cally identical with those from the Vicksburgian, I cannot, in the material 

 before me, find characters by which to separate them. The best preserved 

 specimens from Bowden are nearer the European P. strigilatus than to the 

 existing recent American species. 



