1901.] NATUKAL SCIENCES OF PHILADELPHIA. 393 



No species of the type proposed by Dr. Jousseaume and ^Messrs. 

 Dollfus and Dautzenberg was contained in Martyn's original list. 

 Their use of the name Clava is therefore without proper founda- 

 tion, while Ball's course is clearly supported by the evidence of 

 Martyn's original work. 



The Vertagus pfefferi of Dunker is not a Vertagus or Clava, but 

 a true Cerithlum, which I have received from Hirado, prov. Hizeu, 

 Japan (collected by Mr. Hirase). and from Hong Kong (B. 

 Schmacker). It is very close to C. granosum Kiener (not of 

 Searles Wood, 1848), which was described from the Red Sea, and 

 has been reported by Lischke (^Jap. Meeres-Conchyl., I, p. 68) 

 from Nagasaki. C. mitrceforme Sowb. seems to differ but little, if 

 at all, and C. eximium Sowb. and rubus of Sowerby and Tryon^* 

 may be the same thing. As there is great uncertainty about the 

 species of Kiener and Sowerby, I prefer to use the name given by 

 Dunker, based upon Japanese specimens, and with a good descrip- 

 tion and figures, for the Japanese form. 



Cerithium chemnitzianum n. sp. PI. XIX, figs. 14, 15. 



Shell oblong-conic, strong, pale yellow, sparsely maculate and 

 densely dotted with rich brown. Sculptured with many very low 

 spiral cords which are weakly gi-anose, the grains irregularly alter- 

 nating brown and white; the upper two cords with stronger grains. 

 There are about 10 of these cords on the latter part of the last 

 whorl, 4 on the penultimate, and 3 on each of the earlier whorls. 

 The intervals between cords are densely striate spirally, the strise 

 usually very unequal, a median one generally larger, sometimes 

 nearly as large as the primary cords, and brown-dotted. Outlines 

 of the spire convex below, becoming straight above. Whorls 

 remaining 8 (the apex being eroded), the upper ones flattened, 

 the last three somewhat convex just below the sutures, the last 

 whorl having a very strong, tumid, oblique varix on the back, and 

 another less elevated one strengthening the outer lip. Aperture 

 slightly oblique, the base being a little advanced, white within; 

 outer hp strongly arched, almost forming a semicircle. Columellar 



^" That the English monographers and Tryon should have identified this 

 small species as Martyn's Clava rubus is inexplicable. Jliirex serratus 

 of Wood, in the Index Testaceologiciis, PI. 28, fig. 158, is a much reduced 

 and poor figure of the true O. rubus Martyn ; but C. serratum of the Eng- 

 lish and German monographs is quite another thing. 



