NOTES ON CHRYSODOMUS—DALL. 211 



In the magnificent volume on the moUusks of the expeditions in 

 northern seas of the Princess Alice and Hirondelle by Dautzenberg 

 and Fischer, published by the Prince of Monaco in 1912, the authors 

 ha^e utilized Morch's name for this group of Chrysodominae and 

 have divided it into several subgenera, chiefly on the basis of the 

 relative lengths of the spire and canal. If the learned authors had 

 been able to consult such a collection of boreal Buccinidae as the 

 United States National Museum possesses, it is probable that they 

 would have given less weight to characters of which every grada- 

 tion may sometimes be observed between species of this group, and 

 which often afford little opportunity of drawing valid distinctions 

 of more than specific rank between them. 



Their arrangement is as follows : 



Genus SIPHO " Klein, 1753." 



Subgenus Siphonorhis Morch, 1869 Type, S. ebur Morch. 



Section Tiirrisipho Dautzenberg and Fischer, 



1912 Type, 8. lachesis Morch. 



Subgenus Anomalosipho Dautzenberg and Fischer, 



1912 Type, S. verknizeni " Kobelt." 



Subgenus Mohnia Friele, 1879 Type, S. mohni Frielt. 



Subgenus Parasipho Dautzenberg and Fischer, 



1912 Type, S. kroyeri Moller. 



The arrangement adopted by M. Cossmann in his Essais de 

 Paleoconchologie comparee, 1901, p. 96, .is as follows: 



Family CHRYSODOMIDAE. 



Genus CHRYSODOMUS Swainson, 1840. 



Suljgenus Ohrysodomus s. s. 

 Subgenus Sipho " Klein," Cossmann, 1901.^ 

 Neotype, S. gracilis Da Costa. 



Section Siphonorhis Morch, 1869. 

 Type, Nepfunea ehur Morch. 

 Subgenus Volutopsis Morch, 1857. 

 Type, Neptunea norvegica Chemnitz. 

 Section Mohnia Friele, 1879. 

 Type, M. mohni Friele. 



1 M. Cossmann in the " Essais," p. 101, writes : " Le nom Sipho, emprunt^ a Klein & 

 6t6 admis par les plupart des auteurs bien avant Morch (v. Herrmannsen, 1845)." On 

 turning to Herrmannsen's volume (of 1847) we find indeed that Sipho had been used by 

 Fabricius and Brown before Morch, but for totally different animals from those now desig- 

 nated Coins, while for Klein's Sipho Herrmannsen's comment is : " Genus Turbinum, Fusi, 

 Mitrae, Buccinl, et Pisaniae species confundens." 



