178 NEW WEST AMERICAN SHELLS — DALL. 



last whorl there are twenty-two browa ridges aud as many more inter- 

 calary, of the same color as the shell. In melanitic specimens all may 

 be tinged brown. On the antepenultimate whorl between the sutures 

 there are about six main ridges and eight intercalary. The costie are 

 rounded and prominent only on the earlier whorls, but they remain on 

 tlie last whorl in a flattened condition, but extend well over the pe- 

 riphery, and are not obsolescent as in the last species. The interior of 

 the aperture is white. Before the lips are thickened the brown lines 

 show through, and the prominent white threads of the throat are dis- 

 tant from the outer edge. In this stage there is no siphonal fascicle. 

 Later both lips may be strongly thickened ; the threads (ten or fifteen 

 in number) nearly reach the edge; a labial callus and fasciole are 

 formed. Jn adults there are about twelve cost?e on the last and ten on 

 tbe sixth whorl. 



This species may reach 2 inches in length. A specimen perfect, but 

 with the lip still unthickened, measures 49 millimetres long; spire, 

 24 millimetres; aperture, 15 millimetres (to posterior notch); canal, 

 12.5 millimetres. The total is more than the total length, not being 

 measured on a med'an line. 



This beautiful species appears to be very rare in a perfect condition, 

 though rolled specimens are common on Catalina Island (northern) 

 beaches and at San Pedro. The features of a young living specimen 

 from Monterey are obscured by the shaggy epidermis, of which beach 

 specimens show no trace whatever. In much thickened specimens there 

 is a lump on the whorl at the posterior angle of the aperture. It is per- 

 fectly distinct from the other Californian species and from any I find 

 figured in the monographs. In a general way it is perhaps a little like 

 F. ustulatus Reeve (Conch. Icon., PI. xvir, Fig. 66). It was named in 

 honor of Dr. W. Kobelt, of Frankfort on the Main, who has prepared 

 a monograph of the genus. 



Fusus (Chrysodomus?) Harfordi Stearns. 



(Plate VI, Fig. 6.) 



Fusus Harfordi Stearns, Prel. Descr., Aug., 1871, Proc. Cal. Acad. Sci., v, p. 79, 1873; 

 Dall, Extr. Proc. Cal. Acad. Sci., Mar. 19, 1S77. 



Habitat : Mendocino County, California ; Harford. Farallones Is- 

 lands, off San Francisco Bay ; Watkins. 



Fusus cinnamomeus Rve. (Conch. Ic, 16) presents some resemblance 

 to this species, which differs from the former in having a shorter canal, 

 a longer spire, more rounded whorls and much deeper sutures; more 

 numerous revolving ridges, which are also narrower; and especially in 

 the presence of strongly marked, beautifully rounded costaj, which 

 become obsolete next the suture and on the last whorl. These costa' 

 recall those on the upper whorls in decorticated Priene oregonensis, but 

 are not cancellated. They reach across the whorls in the young shell, 

 fading out anteriorly as it approaches the adult condition. In young 



