NO. 2124. THE WEST AMERICAN SPECIES OF NUCELLA—DALL. 



567 



by the sculpture; pillar slightly arcuate, flattened anteriorly, the 

 canal narrow and curved to the left; umbilicus sometimes sealed, at 

 others showing a deep narrow perforation behind the callus of the re- 

 flected pillar. 



Type locality, Nootka Sound. 



Measurements. 



Whorls. 



Height 

 of shell. 



Height 

 of last 

 whorl. 



Breadth. 



3i 

 3J 

 3i 



30 

 30 

 36 



THAIS (NUCELLA) CANALICULATA Duclos. 



Plate 74, figs. 1-i. 



Purpura canaliculata Duclos, Ann. Sci. Nat., vol. 26, Mai, 1832, p. 104, pi. 1, 



fig.l , California. — Humboldt and Bonpland, Recueil d'obs. de Zool., vol. 



2, 1832, p. 316. 

 Purpura analoga Forbes, Proc. Zool. Soc. London, 1850, p. 273, pi. 11, fig. 12, 



California. 

 Purpura dccemcostata Middendorfp, Beitr. Mai. Rossica, vol. 2, 1849, p. 116, 



pi. 9, figs. 1-3. 

 Purpura lapillus var. heringiana Middendorfp, Sib. Reise, vol. 2, 1851, pt. 1, 



p. 222, pi. 12, figs. 10, 11 (only), Okhotsk Sea. 

 Pwrpitra/rej/cwe^w Middendorfp, (part) Beitr. Mai. Ross., 1849, p. 117. 

 Purpura canaliculata Carpenter, Rep. Brit. Assoc, for 1863, p. 662, 1864 



(Smithsonian reprint, 1872, p. 148), (syn. ex. parte excl.); Puget Sound to 



San Francisco, California. 

 Purpura lapillus var. Tryon, Man., vol. 2, 1880, p. 175, pi. 53, fig. 156. 

 Purpura lima, {part), Taylor, Trans. Roy. Soc. Canada, ser. 2, vol. 1, sect. 4. 



1895, p. 72, not of Martyn, 1784. — Vanatta, Nautilus, vol. 24, No. 4, 



August, 1910, p. 37.— Keep, W. Coast Shells, 1911, p. 180, fig. 169.— Cooke, 



Proc. Mai. Soc. London, vol. 11, pt. 4, March, 1915, p. 203. 



Range. — Aleutian chain from Attn eastward to Sitka and south- 

 ward to Puget Sound and Monterey, California. 



This species has been confounded with Thais lima by several 

 authors and with T. freycinetii by others. Tryon, as usual, ''lumps 

 it" with T. lapillus. The reasons for considering it distinct will 

 follow later. 



At the same time that this species was described by Forbes under 

 the name of analoga another species was ii.a.in.ed fuscata, figured, and 

 said to come from the Hawaiian Islands. Carpenter in his report of 

 1864 says the types oi fuscata in the British Museum comprise one 

 brown and one immature white specimen, which he describes as a 

 "large smooth rather elevated variety of saxicola" (p. 592). This 

 does not at all agree with Forbes's figure. On the other hand, Cooke 

 (p. 204) states that "The type oi fuscata is the larger of two speci- 

 mens in the British Museum, collected by Captain Kellett and 



