Seraphs andersoni (Dickerson, 1917)

Figure 4A

1917 Terebellum andersoni Dickerson, p. 180, pl. 31, figs. 9a, b. Jung 1974, p. 29. Effinger 1938, p. 363. = Seraphs (Seraphs) andersoni Dickerson — Jung 1974, p. 29, pl. 9, figs. 5, 6. Effinger 1938, p. 380.

Terebellum fusiforme Lamarck —de Gregorio 1890, p. 116, pl. 10, figs. 9, 10.

Type material. Holotype — CAS 434. The holotype measures 38 mm in length, with a width of 11 mm (Jung 1974).

Typelocality. Cowlitz River, Vader, Lewis County, Washington [Rupelian] .

Diagnosis. The shell is moderately stout and convolute. The apex is pointed, and there is no evidence of sutures between the volutions. The whorls have protocyrt growth lines. The aperture has a thin labrum and a columella that is basally recurved.

Distribution. OLIGOCENE—Rupelian— USA, east bank of the Cowlitz River, near Vader, Lewis County, Washington (Jung 1974); Santa Barbara County, California (Effinger 1938); Griens Ranch Fauna of Western Wash- ington (Effinger 1938).

Remarks. Seraphs andersoni is the only member of Seraphs from the north-west American Rupelian. The shape is distinctive in having a more acute apex than other Seraphs . There are two species that proceed S. andersoni from the Priabonian, S. kaindraperi new species from the Caribbean and S. belemnitus from Florida; both species have a much stouter spire and are less biconic, being more rectangular than S. andersoni . One species of Seraphs proceeds S. andersoni in the Americas, S. hernandoensis from the Chattian and Aquitanian of south-eastern United States; this differs from S. andersoni in having a much more elongated and narrow form.