AET. 15 NEW MARINE MOLLUSKS FROM PANAMA BARTSCH 6 



incised spiral lines. The fourth and last incised spiral line on the 

 spire marks the anterior termination of the dark spots. In addi- 

 tion to these incised spiral lines, the entire spire and base are marked 

 by microscopic, closely spaced, incised spiral lines, which, in com- 

 bination with the incremental lines, lend to the outer surface a very 

 fine clothlike sculpture. Periphery well rounded. Base short, well- 

 rounded, marked by the continuation of the axial ribs and six equal 

 and equally spaced incised spiral lines, which equal those of the spire 

 in strength. Columella short, stout, marked by 10 spiral cords, which 

 grow successively weaker from the posterior anteriorly, the last 

 two at the tip of the columella being mere threads. Aperture sub- 

 lunate, decidedly channeled anteriorly and feebly so at the pos- 

 terior angle. Outer lip becoming much thickened immediately 

 within the edge, provided with eight teeth on the inside, which 

 grow progressively weaker from the posterior anteriorly. Inner lip 

 forming a thick callus that is reflected over the columella. Parietal 

 wall also covered by a thick callus, which joins the outer lip at the 

 posterior angle of its aperture. 



Tijpe.—U.S.^M. No. 368144, collected by C. D. Alleman on Taboga 

 Island, Panama. It has 8 whorls and measures: Length, 6 mm.; 

 diameter, 3 mm. U.S.N.M. No. 368167 contains 4 topotypes from the 

 same source, while U.S.N.M. No. 331819 contains a single specimen 

 collected by Dr. James Zetek on the same island. This was pre- 

 viously misidentified as Aruichis pygTaaea Sowerby. It bears col- 

 lector's number 541. 



EUDAPHNE, new genus 



Plate 1, Figxjre 3 



The shell is very elongate-ovate and small. The nuclear whorls 

 with sinusigerid sculpture. The early postnuclear whorls with strong 

 axial riblets and strong spiral lirations, the junction of which pro- 

 duces a nodulose sculpture. On the last turn the axial riblets dis- 

 appear or become obsolete, leaving the spiral sculpture only. The 

 sinus is immediately below the suture and is moderately deep and 

 broad. Inner lip and the inner portion of the parietal wall covered 

 by a thin smooth callus. Operculum unknown. 



Type species. — Eudaphne cdleriiani Bartsch. 



Range. — This group ranges from California to Panama. 



EUDAPHNE ALLEMANI, new species 



Plate 1, Figure 3 



The shell is small, very elongate-conic, and pale brown blotched 

 and variegated with yellowish white. Of the nuclear whorls two 

 and one-third remain in the type showing a sinusigerid sculpture. 



