170 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Liotia acuticostata Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 652. 
Proceedings of the California Academy of Sciences, 3:159. Tryon and Pilsbry, 
Manual of Conchology, 10: PI. 36, fig. 1. 
L. t. parva, subglobosa, alba; anfr. nucl. ii. laevibus, apice satis extante; 
anfr. normalibus iii., carina in spira maxime extantibus ii., anfr. ult. vi.; 
suturis subrectangulatis; apertura circulari; labio extus parum contracto; 
labio conspicuo; umbilico haud magno. (Carpenter.) 
Turbinate, with revolving riblets, which are more or less nodose above, 
imperforate. Diameter, 4 mm. (Tryon and Pilsbry, Manual of 
Conchology.') 
Type in State Collection, Species 519a. Type locality, Catalina Island, 
California. 
Range. Catalina Island, California, to Magdalena Bay, Lower Cali- 
fornia. 
Liotia acuticostata radiata Dali, 1919 
Proceedings of the Biological Society of Washington, 31:8. 
Shell resembling the type but with numerous radiating riblets visible 
in the interspaces between the revolving costae. (Dali.) 
Type in United States National Museum, No. 223291. Type locality, 
off South Coronado Island. 
Range. San Diego to Coronado Islands. 
Liotia fenestrata Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 652. 
Proceedings of the California Academy of Sciences, 3:158. 
L. t. parva, primum subdiscoidea, postea variante, albido-cinerea; anfr. 
nucl. laevibus, planatis, apice depresso ; anfr. norm. ii. et dimidio, convexis ; 
clathris validis distantibus circ. xv. radiantibus, et vii. spiralibus, sub- 
aequantibus, conspicue fenestrata; apertura circulari, saepius plus minusve 
declivi, parieti vix attingente; umbilico maximo, anfractus monstrante; 
labio, regione umbilicari, sinuato. (Carpenter.) 
Depressed, clathrate by equidistant spiral and radiating riblets, with 
deep interstices, sculpture terminating with a spiral ridge surrounding the 
rather wide, deep umbilicus. Diameter, 4.5 mm. (Tryon and Pilsbry, 
Manual of Conchology.) 
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