NO. 2134. NOTES ON GHRYSODOMUS—DALL. . 213 



Anomalosipho is based, is very different in form and color from the 

 original /S. verkruseni, which is not an Anomalosipho as defined. I 

 would therefore propose the name of Anomalosipho dautzenhergii 

 for the real type of that subgenus, which has perfectly obvious 

 strong spiral sculpture and is closely related to "£'wMrm" conulus^ 

 Aurivillius, from the Arctic Ocean near Bering Strait, described and 

 figured in the Vega report of 1885 (pi. 13, fig. 6). 



Mohnia is generally accepted, and fairly well distinguished from 

 the other groups, though some species of Plicifusus have a somewhat 

 incurved nucleus of the operculum. It is notable that shells specifi- 

 cally very unlike agree in having a Mohnia operculum. 



The subgenus Parasipho is founded on the same type as Plicifusus 

 proposed 10 years earlier, and which will therefore take precedence. 



M. Cossmann's arrangement is peculiar in making Mohnia a 

 section of 'Volutopsis^ but its principal feature is the combination 

 of a number of small Eocene forms under the generic name of Par- 

 visipho. In the absence of specimens of these species, it would be 

 unwise to discuss their relations, especially as M. Cossmann's fig- 

 ures, phototyped from the fossils, are not as clearly defined in minor 

 details as might be desired. One notes, however, the resemblance of 

 Columhellisipho to Aesopus Gould, and of Am^plosipho to certain 

 forms which have by others been referred to Daphnella. It is also 

 doubtful if any form with a strongly thickened varicose outer lip 

 internally dentate, like Varicosipho^ can be safely referred to this 

 family. The difficulties of correctly referring fossil forms to their 

 true position in the system without an intimate knowledge of their 

 recent analogues are, however, very gi*eat, and the service rendered 

 by M. Cossmann in bringing together scattered material for the use 

 of those of more limited facilities is one deserving of appreciation. 



Taking into account the preceding considerations, the following 

 arrangement has been settled on. 



Family CHRYSODOMIDAE. 

 Genus CHRYSODOMUS Swainson. 



Murex, sp. Linnaeus, Syst. Nat., ed. 10, 1758, p. 754. 



Fusus, sp. Beuguiebe, Encyl. Meth.. vol. 1. 1789, p. xv, pi. 428. Xot of 

 Helbllng, 1779. 



Neptunea, sp. Bolten, Mus. Boltenianum, 1798, p. 115. — Link, Beschr. Rost. 

 Samml., vol. 3, 1807, p. 117. 



Chrysodomus Swainson, Malacology, 1840, pp. 90, 308. Type, Mvrex an- 

 tiquum Linnaeus. Not of G. O. Sars, Moll. Reg. Arct. Norv., 1878, p. 

 269 ( = Beringius Dall ) . 



