INSTITUTE OF SCIENCE, PHILADELPHIA. 359 



to the " genus " Cochlolepas Klein by Conrad. Capidtis higiibris Conrad is a 

 brachiopod belonging to the genus Discinisca, and found from the eariier 

 Miocene upward to the PHocene beds. It is probable that the Capulus com- 

 plectus AldrichjWhen more fully investigated, may turn out to be an Amalthea 

 also. It is from the Wood's Bluff and Lisbon, Ala., Eocene. 



Family AMALTHEID^. 



Genus AMALTHEA Schumacher. 



Amalthea pygniaea Lea. 



Hipponyx pygnicea Lea, Contr. Geol., p. 95, pi. 3, fig. 75, 1833. 



Cochlolepas pygmaa Conr., Am. Journ. Conch, i. p. 33, 1S65. 



Rotella (Helcion) pygmcea De Gregorio, Mon. Eoc. Ala., p. 147, pi. 14, figs. 4-7, 1890. 



Hipponix mgrediens De Greg., op. cit. p. 146, pi. 14, figs. 8, 9. 



Fossil in the Claibornian and in the Older Miocene of the Orthaulax bed, 

 Ballast Point, Tampa Bay, Florida, Burns and Dall. 



It is probable that M. de Gregorio's " i?o^^//« " is a printer's error for 

 Patella. He figures an extremely minute specimen (i mm.) of Lea's species 

 as a " Rotella" and a larger one with the apex worn off as a new and " dubi- 

 ous " species of Hippojiyx. At least the figures and description lend them- 

 selves to this supposition. It is curious that the muscular impression of the 

 shell, which he reproduces from Lea, did not put him on his guard, since it 

 shows that it is impossible for the shell to belong to the PatellidcE. 



A single specimen of this species was collected at Ballast Point, adding 

 another to the already respectable list of species which survived from Upper 

 Eocene into the Chipola Miocene. 



Amalthea Willcoxii n. s. 

 Plate 17, figure 6. 



Shell small, conical (the nucleus lost), slightly dextrally twisted, sculpt- 

 ured with numerous regular concentric ridges over which radiating riblets 

 proceed from near the apex to the base, becoming somewhat tubercular at 

 the intersections ; apex in the posterior fourth, elevated ; base oval ; margin 

 slightly crenulated by the sculpture or simple ; muscular impressions as usual 

 in the genus. Alt. of shell 5.5 ; transverse diam. of base 6.0; long, of base 

 9.0 mm. 



This very pretty little species is quite distinct from any of the other 

 species recent or fossil of the region. It is perhaps nearest to A. siibrufa 

 (Lam.) Cpr., of the Antilles. I refer it to Amalthea rather than Capuhis, on 

 account of the irregularities of the basal margin and the bluntness of the 

 apex, which agree better with the former genus than with the latter. 



Amalthea antiquata Linn6. 

 A. antiquata Dall, Bull. U. S. Nat. Mus. No. 37, p. 154, No. 883, 1889. 



Fossil in the Pliocene of the Caloosahatchie beds, Dall ; living from the 



