'°l89o"''] PROCEEDINGS OF THE NATIONAL MUSEUM. 351 



2. AspredinicMliys Bleeker Ich. Arch. Indici Prodr., v. 1, p. 3"2S, 1S58; Nederl. Tijdschr. 



Dierkunde, v. 1, p. 118, 1863. 



Type A. tibicen — Asprtdo tibicen Temminck. 



BUNOCEPHALINiE. 



Sy)ionyms as subfamily names. 



<^SiIitiidia, Rafiuesque, Analyse de la Nature, p. BS), 1815. 



<^Anesipomes (iribu) Latreille Fain. Nat. Regne An., p. 125. 1825, 



<CPimelodini, Bonaparte, Nuovi Aunali d. Sci. Nat., t. 2, p. 133, 1839 ; t. 4, p. 276, 1840. 



<^Aspr€dina^, Swainson. Nat. Hist, and Class. Fishes, etc., v. 1, p. 332, 1838, V. 2, pp. 



189, 3:8, 1839. 

 <lPimeIodini, Bonaparte, Cat. Metod. Pesci Enropei, p. 5, 1846. 

 =Bunocephalini {cohors) Bleeker Ich. Arch. Indici Prodr., v. 1, p. 328, 1858; Enum. 



sp. Piscinm Archipel. Indico, p. xxviii, 1859. 

 =BimocephaUformes, Bleeker, Nederl. Tijdschr. Dierk., v. 1, p. 117, 1863; Atlas Ich. 



Indes N^erland, v, 2, p. 19, 1862. 

 <C,Silurida^ Proteropodes (group Aspredintna) Giinther Cat. Fishes B. M., v. 5, pp. 11, 12, 



266, 1864. 

 =Bunocephalin(B, C. and R. Eigenraann, Rev. S. Am. Nematognathi, pp. 9, 13, 1890. 



Genera. 



3. /JiiHocep/mZMS Kner Sitzuagsb. 1. Akad. Mis3., [Wien]. v. 17, p, 96, 1855= Js;)»edo 



-Swainson Nat. Hist. Fish etc., v. 1, p. 332, 1838 ; v. 2, p. 368, 1839. 

 Type B. rerrucosus^^Platyitacus verrucosus Bloch. 



4. Dysichthys Cope Proc. Acad. Nat. Sc. Plula., 1874, p. 133. 



Type D. coracoideus Cope. 



r>. Bunocephalichthys Bleeker Arch. Indici Prodr., v. 1, p. 329, 1858; Nederl. Tijdschr. 

 Dierk., v. 1, p. 118, 1863.* 

 Type B. liy2)siurus^=Bunocepiiahis hyjisiurus Kuer. 



RELATIONSHIP. 



The affinities of the Aspredinids to tbe other families of Nematognaths 

 cau not be positively ascertained till a study of the anatomy, and espec- 

 ially of the osteology, of those fishes has been made and their structural 

 characteristics compared with those of other families. The materials for 

 this investigation are not now at hand. The skull of Aspredo has beeu 

 figured by Dr. C. B. Briihl in his "Osteologisches aus dem Pariser 

 Pflanzgarten" (ISoG, pi. 10, figs. 1-8), and the figures given amply con- 

 firm the differentiation of the genus as the type of a peculiar family, 

 but the details are not sufficieutly given or are too ambiguous to justify 

 any positive conclusions. No opercular bones are represented, and 

 Professor Cope has positively denied the existence of an operculum, 

 giving as the diagnostic characteristic of the family Aspredinidcv, "oper- 



* The genera Aspredinichtbys and Bunoce2)balich1hys,as yveU as the restrictions of 

 the previously named ones, have beeu generally referred (as by GUnther and the 

 Eigenmanus) to Bleeker's article published in 1863, but they were actually published 

 with appropriate diagnoses in 1858, as indicated iu the synonymy. 



