1918.] NATURAL SCIENCES OF PHILADELPHIA. 337 



AGOREION, p. X; presumable type Acanthoderma spinosum 

 Agassiz (fossil). This is offered as a substitute for "Scleroderma 

 Agassiz," used in Fungi, and in the form of Sclerodermus for a genus 

 of bees. But I find no genus "Scleroderma^' in Agassiz's works. 

 The name is probably a slip of memory, for Acanthoderma Agassiz 

 (1848), which is really preoccupied, Acanthoderma Cantraine (1835); 

 on this supposition Agoreion may be provisionally accepted in place 

 of Acanthoderma. 



SCROPHA, p. VIII, is offered in place of Ceratodus (fossil), on 

 account of Ceratodon. 



Other names suggested as substitutes are plainly inadmissible. 

 These among fishes are the following, arranged in the order given 

 by Gistel (the alphabetical order of the names to be displaced): 



CARCHARIAS, p. VIII, for Acanthias Risso, on account of the 

 prior Acanthia. But Acanthias is a synonym of Squalus L., as 

 properly restricted, and Carcharias is twice preoccupied. 



PELONECTES, p. VIII, for Acanthodes kg., said to be preoccu- 

 pied, which it is not, but is replaceable by the original form Acan- 

 thoessus Ag. 



GREMILLA, p. VIII, for Acerina Cuvier, but Acerina Giilden- 

 stadt, Cernua Schafer and Gymnocephahis Bl. & Schn. are older. 



ADIAPNEUSTES, p. VIII, substitute for Acrodus Ag. (1838), 

 WTongly regarded as preoccupied by Acrodon Zimm. (1840). 



HISTIODROMUS, p. VIII, for Anastomus Gronow, 1763; revived 

 by Scopoli, 1777, therefore not preoccupied by Anastomus Illiger, 

 1835. 



NOMALUS, p. VIII, for Ancylodon, preoccupied by another sub- 

 stitute name; Macrodon Schinz (1822). 



CERDO, p. VIII, as substitute for Aselhis Klein. Klein mentions 

 Asellus only in a footnote under Callarias (Gadus). The name 

 "Cerdones" appears in connection with the cod-fish, and Cerdo may 

 be regarded as a synonym of Gadus L. 



SCROFARIA, p. VIII, a needless substitute for Ausonia Risso, 

 itself a synonym of Luvarus Raf. 



GLISCUS, p. VIII, substitute for Blochius Volta (fossil) for no 

 reason, save Gistel's objection to personal names, in his scheme 

 allowable only among plants and the very lowest animals. 



THALASSOKLEPHTES, p. VIII, a substitute for Caninoa 

 Narclo, because it is improper to compare a prince (Charles Lucien 



