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



We are following the names adopted for the cranial ridges and spines 

 of the Scorpaenidae (see figs. 136, 137). 



Counts made on the Marshall Islands specimens are recorded in 

 table 126. The comits of the soft rays, especially of the pectorals, 

 where branched and unbranched rays are separated, are of little 

 value since some of the simple rays become branched in the large 

 fish, whereas they are simple in the small ones. 



Dr. L. F. de Beaufort (Proc. Nat. Inst. Sci. India, vol. 22, B, No. 2, 

 pp. 83-85, fig. 1,A, 1957) described as new Platycephalus horai, from 

 off New Guinea. I am unable to place it genericaUy in the following 

 key. 



KEY TO THE GENERA OF PLATYCEPHALIDAE 



la. Vomerine teeth continuous across head of the bone, connecting lateral 

 patches; palatine teeth in a single series or nearly so; premaxillary 

 patch of teeth with a few caninelike teeth along inner edge near 

 symphysis; spines and ridges on head low, not notably prominent; 

 cheek bicarinate; two strong preopercular spines, lower one usually 

 strongest and longest; only one opercular spine; no antrorse spine on 



preopercle Platycephalus '^ Bloch 



16. Vomerine teeth in two villiform patches separated mesiaUy by a deep 

 edentulous furrow; palatines usually in a narrow to broad villiform 

 band; premaxillary without canines; ridges and spines of head prominent, 

 the upper preopercular spine usually strongest and longest. 

 2a. Two opercular spines and 2 to 6 preopercular spines at lower posterior 

 angle; gill rakers 1 + 1 + 3 to 5 developed as distinct elongate projec- 

 tions. 

 3a. Suborbital ridge finely serrate along its entire length. 



4a. Ridge of lower opercular spine not finely serrate, but ending in a 

 spine; cheek unicarinate. 

 5a. Preopercle with a strong antrorse spine on lower margin; opercular 

 margin without a free dermal flap. 



Rogadius '^ Jordan and Richardson 



12 Platycephalus Bloch, Naturgeschichte der auslandischen Fische, vol. 9, p. 96, 1795 (type species, 

 Platycephalus spathula 'B\och = CalUonymus indicus Linnaeus). 



CalliomoTus Lacepede, Histoire naturelle des poissons, vol. 2, p. 343, 1800 (type species, Platycephalus 

 indicus Linnaeus). 



Neoplatycephalus Castelnau, Proc. Zool. Acclim. Soc. Victoria, vol. 1, p. 87, 1872 (type species, Neoplaty- 

 cephalus grandis Castelnau). 



Colefaxia Whitley, Rec. Australian Mus., vol. 19, no. 4, p. 249, 1935 (type species, Platycephalus macrodon 

 Ogilby). 



Trudis Whitley, Australian Zool., vol. 6, no. 4, p. 327, 1931 (type species, Platycephalus bassensis Cuvier 

 and Valenciennes). 



Longitrudis Whitley, Australian Zool., vol. 6, no. 4, p. 1931 (type species, Platycephalus longispinis 

 Macleay). 



Planiprora Whitley, Australian Zool., vol. 6, no. 4, p. 327, 1931 (type species Platycephalus fuscus Cuvier 

 and Valenciennes). 



Cacumen Whitley, Australian Zool., vol. 6, no. 4, p. 326, 1931 (type species, Platycephalus speculator 

 Klunziuger). 



Cumbel Whitley, Proc. Roy. Zool. Soc. New South Wales 1950-51, p. 32, 1952 (type species, Platycephalus 

 haackei Steindachner). 



18 Rogadius Jordan and Richardson, Proc. U.S. Nat. Mus., vol. 33, p. 630, 1908 (type species, Platycephalus 

 asper Cuvier and Valenciennes). 



