CLASS GASTROPODA 
165 
pressed, bordered below by a series of obliquely descending corrugations, 
which are cut into granules by from one to five spiral furrows; periphery 
carinate, subspinose on the upper whorls, usually nearly smooth on body- 
whorl; base nearly flat, concentrically lirate, the lirae more or less tuber- 
culate, five or six in number, their interstices regularly striate; aperture 
subtriangular, white within, the lower margin fluted; columella arcuate, 
broad, excavated at position of the umbilicus, and terminating in a tooth¬ 
like prominence below. Alt., 45; diam., 55-62 mm. (Tryon and Pilsbry, 
Manual of Conchology .) 
Type in Martyn Cabinet. Type locality ? 
Range. Vancouver Island, British Columbia, to San Pedro, California. 
Astraea inaequalis pacifica Dali, 1919 
Plate 108, figs. 3, 4 
Proceedings of the United States National Museum, 56:356. 
Shell of moderate size, of a reddish color, trochiform, carinate, of more 
than five flattish whorls, the apex defective; the carina overhangs a some¬ 
what obscure suture; axial sculpture of numerous (on the last whorl about 
70) obliquely protractive, close-set, rounded riblets, which are cut an¬ 
teriorly into segments by three rather obscure grooves; these riblets, 
bunched in pairs and swollen, undulate the carina, giving it a somewhat 
stellate profile; on the base from the carina to the umbilical callus are six 
deep channeled grooves separated by wider interspaces, which are crossed 
by numerous minute laminae; the squarish interspaces obliquely nodu¬ 
lous ; aperture diamond-shaped, simple, body with a glaze of enamel; pillar 
concavely arched, white with a callous deposit on the umbilical area behind 
it. Height, 25; maximum diameter, 42 mm. (Dali.) 
Type in United States National Museum, No. 222320. Type locality, 
Pacific Beach, San Diego, California. 
Range. Known only from type locality. 
Astraea inaequalis montereyensis n. subsp. 
Plate 108, figs. 5, 6 
Shell thick, imperforate; whorls 8, sculptured with corrugated, 
obliquely descending folds; periphery more rounded than the typical 
species; base with five coarse squamose lirae. Aperture subtriangular, 
pearly; columella slightly arcuate. A thin callus covers the umbilical 
region and part of the base. Shell much taller and heavier than the typical 
species. 
[7671 
