1920.] NATURAL SCIENCES OF PHILADELPHIA. 305 



Under the circumstancos it appear? safer to call the Hawaiian 

 form (which has been taken by Langford off Honolulu in G to 8 

 fathoms) T. peasei Desh. Two lots from Pease are in the collection 

 of the Academ3^ 



Teiehra flavescens Desh. (P. Z. S. 1859, p. 299, Reeve, C. Icon. 

 Xn, pi. 14, fig. 59) does not appear to differ much from T. peasei 

 Desh., except that the axial ribs are arcuate. I have not seen it. 

 Locality, Sandwich Islands, Cuming coll. 



Terebra thaanumi n. sp. PI. XII. figs, l, 2. 



A shell resembling T. gouldii Desh.; the whorls shorter than in 

 that species, especially the last whorl, which is much more convex; 

 aperture shorter. It is pinkish buff wath ill-defined streaks of cinna- 

 mon or russet. The sides are straight. The suture and the furrow 

 defining the presutural fasciole are subequal, deeply impressed, the 

 surface narrowly shouldered, subangular below both. The presutural 

 band occupies somewhat more than one-third of each whorl. Sculji- 

 ture of smooth ribs equal to their intervals, about 30 on the penult 

 whorl. No interstitial spiral sculpture. The last whorl contracts 

 abruptly below, the base well rounded, separated from the siphonal 

 fasciole by a furrow bounded below by a sharp ridge. The aperture 

 is subtrapezoidal. Columella straight, obliquely truncate. 



Length 60, diameter 13.5, aperture 14 mm.; 12 whorls, the apex 

 broken. Type. 



Length 51, diameter 10.7, aperture 12.3 mm.; 18 whorls, apex 

 perfect. 



Off Honolulu in 6 to 8 fms. D. B. Langford. Also off Waikiki 

 in 25 to 50 fms. 



By conchological criteria this would probably belong to Dupli- 

 caria; yet until the teeth of many more species of Terebra are ex- 

 amined, no classification of the species has much value. 



Terebra waikikiensis n. sp. PI. XII, flg. 12. 



The shell is slender, slowly tapering, white, with three spiral scries 

 of chestnut dots on the last, two on the preceding whorls; these dots 

 are also in vertical series, of which there are about 8 on the last whorl. 

 Sculptm'e of rounded axial ribs equal to their intervals, about 21 

 on the last whorl. The ribs are deeply sinuated by the presutural 

 groove, which is rather deep between them, and defines a wide 

 presutural band. Below the groove there are three or four furrows 

 across each intercostal interval, and above, near the suture there 

 is one such furrow. The last whorl is convex with numerous spiral 



