Description. Shell white, relatively small, of moderate width; body whorl constricted at base, canal long and straight, length of canal greater than length of aperture; shoulder area concave. Axial lamellae retractively flexed at shoulder, poorly developed on shoulder, 11 -14 on final whorl, sharply spinose at shoulder, spines laterally directed; spiral sculpture of fine striae. Length 14-20 mm.

Type Locality and Type Specimens. Upper Pliocene, Fourth and Broadway, Los Angeles, California. Holotype: UCMP 11088.
Distribution. Queen Charlotte Sound, British Columbia [LACM 69-71.11] (52°N), to San Clemente Island, California [LACM 76-387.8] (32.5°N).
Habitat Soft bottoms, 80-440 m. Occurring at minimal depths in the northern part of the distribution; at depths greater than 300 m in southern California.

Remarks. This species, which was originally described from the Upper Pliocene of Los Angeles, is here first reported in the living fauna. There is variation in size in the living material, as also reported by Moody for fossil specimens, as well as variation in spire height and the number of axial lamellae. The second figure shows a higher-spired specimen in which the canal tip is missing due to breakage.
The long canal and overall profile of Boreotrophon raymondi resembles that of B. coronatus (H. and A. Adams, 1864) [= Trophon muriciformis Dall, 1877], a much larger, northern species from the Chukchi and Bering Seas. Immature shells of that species comparable in size to specimens of B. raymondi differ in being more slender and in having one less teleoconch whorl, and also differ in lacking the fine spiral sculpture of B. raymondi.