Material Examined. Not represented in the voucher collection from the Santa Maria Basin, but occurring to the north and south. Other material: 64 lots in LACM collection.
Description. Relatively small, high-conical; outline oval. Septum simple, extending straight across, lacking props. Sculpture of numerous low, unequal ribs of varying strength, interspaces usually with fine granular punctations. Length 6-9 mm, height 6-10 mm.
Type Locality and Type Specimens. Off Santa Catalina Island, California, 20-40 fathoms. Holotype: USNM 11848. Puncturella eyerdami: Knight Island, Prince William Sound, Alaska; lectotype (here designated): USNM 360136.
Distribution. Kenai Peninsula, Alaska (59°N), to Punta Rompiente, Baja California (28°N). There is also a record (LACM 69-59.2) from the Cerralvo Channel, Gulf of California.
Habitat. On rock bottoms at 20-130 m throughout its distribution, not uncommon.
Remarks. Most specimens have the sculpture eroded. The lectotype of P. eyerdami is an uneroded specimen that shows fine punctations, which led Dall to believe that what he described as that species was different