568 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 49. 



Lieutenant Wood, R. N. * * * The spire is elevated and the 

 spiral ridges well marked." This is probably oorreot; at any rate, 

 the observations on the species here made are based on the supposed 

 aoouracy of the figure in the Proceedings of the Zoological Society. 



The figure is excellent and portrays a shell with two strong spiral 

 ribs on the penultimate whorl separated by deep axially threaded 

 channels. On the last whorl there are six of these ribs. The aper- 

 ture is about one-fifth longer than the spire. No species with these 

 characters is known from the northwest coast. The Hawaiian 

 Islands have long been known for the great number of shells from 

 all parts of the Pacific brought there by whalers and traders, many 

 of which in the literatm-e have erroneously been supposed to form 

 part of the fauna of the Hawaiian group. The figure of the Pur- 

 pura fuscata of Forbes agrees almost exactly with the Indo-Pacific 

 species named by Velain P. dumasi variety cincta,^ and I have a 

 suspicion it is either that or a closely related Indo-Pacific species. 



THAIS CANALICULATA, typical form. 



Type locality, "California." 



Shell bucciniform, of three and a half to foiu" rounded whorls ex- 

 clusive of the nucleus, moderately thick, with a spire about one-half 

 shorter than the aperture, the last whorl largest, with a very uniform 

 sculpture of strong elevated spiral ridges separated by distinctly 

 channeled interspaces crossed by small slightly elevated axial 

 lamellae or elevated lines; minor spirals very rarely occur; there 

 are 4 to 6 major spirals on the penultimate whorl and about 10 on 

 the last whorl; outer lip not reflected and only slightly thickened, 

 usually crenulated by the external sculpture; pillar moderately 

 arcuate, flattened in front where the callus conceals but does not seal 

 a long narrow umbilical chink; canal narrow, recurved (220973). 



Measurements. 



THAIS CANALICULATA, var. ANALOGA Forbes. 



''California." 



Similar to the preceding but stouter, usually with one more whorl, 

 and with a minor spiral regularly intercalated between the major 

 spirals. 



« Arch. Zool. Exper., vol. 6, 1876, p. 102, pi. 2, fig. 15. 



