NO. 2134. NOTES ON CHUytiODOHUS—DALL. 219 



The peculiarly depressed, sharply reticulate, nepionic whorls start- 

 ing from a smooth apical cell form such a contrast to the nucleus in 

 Coins that it seems reasonable to separate them generically. 



Genus KRYPTOS Jeffreys. 



Kryptos (Jeffreys) Dautzenberg and Fischeu, M6ui. Soc. Zool. de France, 

 vol. 9, 1896, p. 435. Type, K. clegans .Jeffreys, Mem. Soc. Zool. de 

 France, vol. 9, 1896, p. 4.3.5, pi. 1.5, fig. 20 (Separate copies, p. 41). 

 Northeastern Atlantic in deep water. 



Nucleus initially smooth, then depressed and reticulate as in 

 Siphonorhis; shell as in Siphonorhis except that axial ribbing is 

 developed over part or the whole of the shell, becoming reticulate 

 or nodulous at intersection with the more prominent spiral sculpture. 

 Operculum rounded-quadrate, short, as in Beringius; verge relatively 

 enormous, cylindrical, with conical tip; eyes and radula apparently 

 wanting in the typical species, K. elegans. 



A manuscript note of Jeffreys states that the type is identical with 

 Boreofusus nodosus Jeffreys of the P orcupine Expedition ; but I have 

 not found that B. nodosus has been published, though we have speci- 

 mens so labeled in his collection. 



The typical species of Kryptos has a plain, somewhat concave 

 band in front of the suture and behind the nodosities at the shoulder 

 of the whorl. Locard referred the species to Pleurotomella^ but the 

 nuclear characters are so obviously Siphonorbitoid that I can not 

 accept this conclusion. Fusus fenestratus Turton, {-\-fusi forme 

 Broderip, -{-Broderipii Jeffreys) probabh- belongs to this genus. 

 Jeffrej's' statement that the " top whorl " is smooth results from the 

 fact that Broderip's type-specimen, now in the Jeffreys collection, 

 had been cleaned with acid. Other species are Fusus dbyssorum. 

 Fischer, 1884^ {profundicola Verrill and Smith, April, 1884). F. 

 sarsi Jeffreys is not a plicate species and probably=e6w/' Morch. 



This group is related to Siplw7iorhis somewhat as PUcifu^sus is to 

 Colu^. 



Genus PLICIFUSUS Dall. 



Flicifusus Dai.l, Proc. U. S. Nat. Mus.. vol. 24, No. 1264, 1902, p. .523. 



Type, Fuatis kroyeri IMoller. 

 Parasipho Dautzenberg and Fischer, Res. Camp. Scientifiques de Monaco, 



livr. 37, 1912, pp. S2, 100. Type, F. kroyeri Moller. 



Shell strongly plicate axially, smooth or spirally sculptured, usually 

 with an inconspicuous periostracum ; nucleus Chrysodomoid ; aper- 

 ture ample, the outer lip markedly flexuous behind, slightly ex- 

 panded, simple, sharp; the pillar callous, the canal slightly twisted 



1 Fischers separate copies of this leaflet were received July 26, 1884 ; the part of the 

 Journal de Conchyliologie containing it, in November, 1884, at the Smithsonian Institu- 

 tion. I am unable to say when this number of the Journal was published. It is dated 

 1883 but did not appear until sometime in 1884. 



