52 U.S. NATIONAL MUSEUM BULLETIN 2 02 Vol. 3 



Genus THYSANOPHRYS Ogilby 



Thysanophrys Ogilby, Proc. Linn. Soc. New South Wales, vol. 23, p. 40, 189'8 



(type species, Platycephalus cirronasus Richardson). 

 Inegocia Jordan and Thompson, Proc. U .S. Nat. Mus., vol. 46, p. 70, 1913 



(type species, Platycephalus japonicus Krusenstern; Japan). 

 Cociiis Jordan and Hubbs, Mem. Carnegie Mus., vol. 10, No. 2, p. 286, 1925 



(type species, Platycephalus crocodilus Tilcsius; preoccupied, replaced by 



Cociella Whitley, Australian Nat., p. 243, May 1940; same type species). 

 Repotrudis Whitley, Mem. Queensland Mus., vol. 10, No. 4, p. 27, 1930 (type 



species, Platycephalus macracanthus Bleeker, Atlas ichthyologique . . ., 



pi. 419, figs. 1, la, 1878). 

 Leviproa Whitley, Australian Zool., vol. 6, No. 4, p. 327, 1931 (type species, 



Platycephalus inops Jenyns). 

 Levanaora Whitley, Rec. Australian Mus., vol. 19, No. 1, p. 95, 1933 (type 



species, Platycephalus isacanthus Cuvier and Valenciennes). 

 Cymbacephalus Fowler, Proc. U.S. Nat. Mus., vol. 85, p. 90, 1938 (type species, 



Cymbacephalus nemato phthalmus (Giinther)). 

 Kumococius Matsubara and Ochiai, Mem. Coll. Agric. Kyoto Univ. No. 68, 



pp. 67, 89, 1955 (type species, Insidiator detrusus Jordan and Seale). 



KEY TO SPECIES OP THYSANOPHRYS FROM THE NORTHERN MARSHALL ISLANDS 



la. Edges of both lips with papillae; least width of bony interorbital space 2 to 

 23^ in greatest diameter of eye; soft rays of dorsal usually 11. 



T. papillolabiura, new species 

 16. Edges of lips without papillae. 



2a. Least width of bony interorbital space 5H to 6 in greatest diameter of eye; 



soft rays of dorsal 11 or 12 T. chiltonae, new species 



2b. Least width of bony interorbital space 1.1 to 2.0 in greatest diameter of 

 eye; soft rays of dorsal usually 12 T. arenicola, new species 



The identification of the numerous named species related to 

 Thysanophrys as herein defined is difiicult because so many of the 

 descriptions lack essential characters that would permit a species to 

 be referred to a genus with certainty. Because of this I have not been 

 able to allocate generically numerous species and thus eliminate them 

 from consideration in the description of the following new species. 

 It has been necessary to search through original descriptions and 

 study figures of the species to find specific characters to compare with 

 my material. The results in some instances hardly justify the con- 

 siderable time spent in these searches. However, pendmg a revision 

 of the family Platycephalidae, and in spite of the existing confusion, 

 it appears necessary to describe three new species in this genus. 



Bleeker (Revision des especes insulindiennes du genre Platycephalus, 

 Nat. Verb. Koninkl. Akad., vol. 19, pp. 1-31, 1877) in his key to the 

 genus Platycephalus recognizes certain groups of species as follows: 

 (1) Teeth on vomer in a continuous transverse band — P. indicus 

 Linnaeus; (2) vomerine teeth in two separate groups and vertical 

 scale rows above lateral line 100 or more — P. nemato phthalmus 

 Giinther, P. quoyi Bleeker, P. punctatus Cuvier and Valenciennes 



