NO. 12 STRONG AND HERTLEIN : MARINE MOLLUSKS 237 



In the entire lot there is considerable difference in the color and in 

 the number and strength of the axial riblets and intercalary spiral 

 threads but the shape and major sculpture remain constant. The present 

 species resembles Liotia rammata DalP^ described from Magdalena 

 Bay, Lower California, but the latter is a larger shell with but 2 spiral 

 keels, more rounded whorls, and a smaller umbilicus. 



This species is named for the Spanish explorer Vasco Nunez de 

 Balboa, who crossed the Isthmus of Panama, and who is reported to 

 have been the first European explorer to view the Pacific Ocean from 

 American shores. 



Liotia erici Strong & Hertlein, new species 

 Plate 21, Fig. 9 



Shell small, turbinate, solid, grayish white; nuclear whorls Ij^, 

 smooth, very small; postnuclear whorls 3^, well rounded, sutures 

 slightly channeled ; spiral sculpture of 4 raised threads on the first post- 

 nuclear whorl and 8 on the second ; on the last whorl there are about 

 16 fine threads above the shoulder, followed by 12 slightly larger threads 

 on the periphery and upper part of the base, umbilicus bordered by 2 

 still larger cords with fine intercalary threads; axial sculpture of fine, 

 close-spaced riblets in the interspaces between the spiral threads over 

 the entire surface; periphery of last whorl and base well rounded, um- 

 bilicus narrow, with a deep groove between the inner lip and the last 

 spiral cord; aperture circular, the posterior angle falling low on the 

 body whorl; outer lip thick, smooth; inner lip thin where it borders 

 the umbilicus, spreading above. Operculum unknown. The type meas- 

 ures: diameter, 2.0 mm; height, 1.3 mm. 



Holotype: No. 729 (Calif. Acad. Sci. Paleo. Type Coll.), from 

 Loc. 27,229 (C.A.S.), in from 3 to 9 fms. in Bahia Honda, Panama. 

 L. G. Hertlein collector. Three additional specimens were dredged at 

 the same locality. 



In size and shape this species is very similar to the last, but the lack 

 of prominent spiral sculpture makes it entirely different from any other 

 species described from the west coast. 



This species is named for a former Assistant Curator of Paleon- 

 tology of the California Academy of Sciences, Mr. Eric Knight Jordan. 



^"^ Liotia rammata Dall, Proc. Biol. Soc. Washington, vol. 31, February 27, 

 1918, p. 7. "Magdalena Bay, L. Cal." — Strong, Trans. San Diego Soc. Nat. Hist., 

 vol. 7, no. 37, 1934, p. 436, pi. 29, figs. 4, 5, 6; pi. 30, figs. 1, 2, 3. Tres Marias 

 Islands, Mexico. Also Ball's original locality record cited. 



