1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 279 



This genus is ascribed to Adanson by courtesy, lie being a non-bino- 

 mial writer not entitled to be quoted in synoDym3\ It appears to Lave 

 first been adopted by Blaiuville. It represents in this division of tlie 

 family the Marinula of King, which belongs to the other subfamily. 

 Fischer states that a section shows the axis to be hollowed throughout 

 its length. 



Pedipes liratus W. G. Binney. Plate 18, fig. 15. 



Fedipes Virata W. G. Binuey, Proc. Acad. Nat. Sci. Phil., 1860, p. 154 ; L. and 

 F. W. Sh. N. Am., pt. ii, p. 20, fig. 21, 1865. 



Habitat. — Cape Saint Lucas, Xantus ; San Diego, Cal., Orcutt. 



Pedipes uiiisulcatus Cooper. Plate 13, fig. 6. 



Pedipes unisulcata Cooper, Proc. Cal. Acad. Sci., 1866, p. 294, p. 29. 

 Hahitat. — San Pedro, Cal., Cooper; head of Gulf of California, near 

 mouth of Yaqui Eiver, Palmer. 



Pedipes naticoides Stearns. Plate 18, fig. 17. 



Pedipes naticoides Stearns, Proc. Bost. Soc. Nat. Hist., October, 1869, vol. xiii, 



p. 108. 

 Turho mirahiUs Mulilfeld, Mag. Ges. Fr. Nat. Berlin, viii, p. 8, t. 2, fig. 13 a-b, 



1818; Pfr. Mou. Aur., p. 70 (Perfii>es). 

 Pedipes quadridens Pfr., Wiogra. Arch., 1839, 1, p. 357. 

 Pedijyes ovalis C. B. Ad., Contr., to Conch., p. 41, Oct., 1849. 

 PedijJes glohulosus C. B. Adams (Mss.). 

 Pedipes iridciis Pfr., P. Z. S., 1834, p. 122; Mou. Aur., p. 72. 



Habitat (naticoides). — Tampa, Stearns ; Key West, Hemphill ; {mi- 

 rabilis) Cuba, Pfeiffer and Gundlach; (ovalis) Jamaica, Bermudas, C. 

 B. Adams ; Guadalupe, Porto Eico, Arango. 



Pfeiffer relegates his P. quadridens to F. mirabilis Muhlfeld. His tri- 

 dens was shown by Gundlach to be a young stage of the same. P. ovalis 

 was stated by its describer to differ from Pfeiffer's species in being 

 slightly more elongated, with the sulcations less marked and the surface 

 smoother. A comparison of specimens of Adams's species with others 

 of P. naticoides, shows that these are here also the points of difference. 

 Hence it seems likely that P. naticoides is a synonym of P. quadridens 

 (= mirahiUs). However, as the latter has not been figured, and I have 

 not been able to see specimens of the Cuban form, I i)refer to retain 

 Stearns's name while indicating its probable synonymy. P. liratus W. 

 G. Binney (1860), from Cape Saint Lucas, Lower California, collected by 

 Xantus, and San Diego, Cal., C. E. Orcutt, is very similar, but differs 

 slightly in color and arrangement of the teeth. P. unisulcatus Cooper, 

 from California, is quite different and much larger. 



Pedipes elongatus, n. s. Plate 18, fig. 4. 



Shell shaped like Alexia myosotis, but more obtuse; color pale straw- 

 color or waxen, with opaquer streaks in the direction of the axis ; whorls 

 four and a half beside the inverted nucleus, smooth, not inflated, op- 

 pressed against the suture ; apex blunt, out of which rises the arch of 



