388 PROCEEDINGS OF THE ACADEMY OF [July, 



three such spiral cords, the last whorl with ten (counted just 

 behind the outer lip) ; the intervals between the spiral cords every- 

 where densely, finely striate. Surface lustreless, black, Ihe inter- 

 vals between ribs and a peripheral belt largely white; the tubercles 

 of the subsutural cord are mostly bi'own, the others chiefly black. 

 Whorls about 8, but slightly convex, the spire being rather 

 straightly conic; last whorl impressed below the suture, concave 

 below the periphery, produced and spirally striated anteriorly. 

 Aperture less than half the length of the shell, blue-white inside, 

 the lip beveled, with a brown spot at the termination of each spiral 

 cord, thickened within and contracted by six rounded teeth, the 

 upper one more widely separated than the others, the second from 

 above largest. Columellar margin concave above with a pliciform 

 tooth near the posterior angle, straightened and rather wide below, 

 bearing five or six transverse tubercles. Length 15, diam. 7, 

 longest axis of aperture 7.5 mm. 



Hirado, Hizen, Avestern Kiusiu (Mr. Y. Hirase). Types No. 

 80,538 Coll. A. K S., from 1,087 of Mr. Hirase's collection. 



This little black-and-white species groups with T. menkeana 

 Dkr., a shorter shell with similar coloration. The unusual promi- 

 nence of the tubercles on the columellar lip, and the sculpture of 

 ribs tuberculate at the intersections of spiral cords, give it much the 

 a2:)pearance of a S'lstrum. 



PURPURA. 



The luteostoma group of Purpura was too much lumped in my 

 Catalogue of Japanese Marine Mollusks. From a renewed study 

 of them, with much moi'e material, it seems that the following four 

 Japanese forms are recognizable: P. luteostoma (Chemn.) Dillwyn, 

 P. hronni Dkr., P. clavigera Kiister, P. tumulosa var. problematica 

 Baker (^ tumulosa Lischke not Reeve). I formerly followed 

 ISIr. E. A. Smith' in referring the latter to P. alveolata Reeve; 

 but I am now convinced that alveolata is, as Reeve stated, a 

 Panamic species. We have specimens from Panama in our collec- 

 tion exactly like his figure. 



Mr. Hirase sends the Californian species P. saxicola Val. from 

 Kisennuma, Rikuzen, on the east coast of Hondo. 



^RZ. S., 1879. 



