THE CYCLOPHORID LAND MOLLUSOKS OF AMERICA 155 



keel and the spiral cords is marked by obsolete spiral threads and 

 coarse incremental lines. The spiral keel marking the outer edge of 

 the umbilicus terminates in a notch at the peristome. The umbilicus 

 is moderately broad and open to the tip. Its wall is marked by rib- 

 like incremental lines. Aperture somewhat oblique, almost circular; 

 peristome simple, notched at the umbilical cord, the parietal wall 

 covered with a moderately thick callus. Operculum unknown. 



The specimen described and figured, U.S.N.M. No. 523512, was 

 received from Sowerby & Fulton with the locality label "Ecuador." 

 It has 5 whorls and measures : Height, 11 mm. ; greater diameter, 18.7 

 mm.; lesser diameter, 13.9 mm. 



The presence of spiral cords below the periphery readily distin- 

 guishes this species from L. crosseanus (Hidalgo). 



LAGOCYCLUS HAEMATOMMA (Pfeiffer) 



Plate 20, Fiqubes 1-3 ; Plate 41, Figures 1-3 



1862. Cyclophorus haematomma Pfeiffee, Proc. Zool. Soc. London, 1862, p. 276. 



1863. Cyclophorus haematomma Pfeiffer, Nov. Conch., vol. 2, p. 217, pi. 57, figs. 



12-14. 

 1897. Amphicyclotiis haematomma Kobelt and Mollendorff, Nachrb. deutschen 



malak. Ges., vol. 29, p. 139. 

 1912. Amphicyclotus haematomma Kobelt, Martini-Chemnitz Conchylien Cabinet, 



vol. 1, sect. 19, p. 924, pi. 138, figs. 10-12. 



Shell helicoid, the early whorls bright brown, gradually fading to 

 flesh color on the last turn. The nucleus consists of about one turn, 

 which is well rounded and smooth. The first postnuclear whorl is 

 also rounded and smooth, but the succeeding turns are well rounded 

 and marked by spiral threads which vary considerably in size. Of 

 these 7 are present on the third and fourth turns and 15 between the 

 summit and the periphery on the last whorl. In addition to this the 

 upper surface is marked by regular lines of growth which lend it a 

 somewhat rough aspect. Suture moderately well impressed. Periph- 

 ery well rounded. Base openly umbilicated, well rounded. The 

 posterior third is marked by 4 strong spiral cords equaling those on 

 the spire. Anterior to this there are microscopic spiral lines. There 

 is a strong axial keel marking the outer edge of the umbilicus and 

 slightly notching the aperture. The umbilical wall is marked by 

 coarse lines of growth. Aperture oblique, subcircular, slightly 

 auriculated at the posterior angle and notched at the basal cord. The 

 peristome is slightly thickened on the inner lip. 



The specimen described and figured, U.S.N.M. No. 536032, is marked 

 "Ecuador," without specific locality. It has 5.4 whorls and measures : 

 Height, 14.6 mm.; greater diameter, 20.5 mm.; lesser diameter, 16.4 

 mm. Height of aperture, 8.4 mm.; diameter, 8.5 mm. 



