REVISION OF PORICHTHYS— HUBBS AND SCHULTZ 489 



PORICHTEIYS GREENEI Gilbert and Starka 

 FiGUBE 57, c 



Porichthys sp. Greene, 1899, pp. 668, 678 (descriptiou of photophores in types). 



Porichthys greenei *GrLBEET and Starks, 1904, pp. 184-185, pi. 30, fig. 56 

 (original description).— Bean and Weed, 1910, pp. 511, 513, 515, 516, 526, 

 flgs. 3, 4, pi. 32, fig. 4 (opercular spine, pectoral fin; one of types of Thalasso- 

 phryne dotm is this species). — *Meek and Hildebuand, 1928, pp. 922, 924- 

 925 (description, records). (Type locality: Tide pools; Panama reef.) 



Should the genus Porichthys be further dismembered, this small 

 species would probably be the first to be set apart, on the basis of the 

 conjoined vertical fins, the usually simple (nonfimbriate) pores of the 

 lateral lines, the lack of minute photophores about the pores of the 

 dorsal branch of the lateral line, the short median branch extending 

 forward from the apex in the branchiostegal row of photophores, and 

 the rounded pectoral fin. 



The following collections of PoHchthys greenei in the National 

 Museum have been examined: U.S.N.M. no. 76548, Panama Canal, 

 Panama City; 81689 and 81690, tide pool, Panama; 81691 and 81692, 

 tide pools, Balboa, Canal Zone; 81693, Panama Bay, Balboa, Canal 

 Zone; 81965, Chame Point, Panama; 101732, 101733, and 101946, all 

 from Secas Isle, Panama. 



The following collections of Porichthys greenei in the Natural 

 History Museum of Stanford University have been examined: No. 

 6485 (type), Panama reef; 6512, Panama. 



Genus NAUTOPAEDIUM Jordan 



Nautopaedium *Jordan, 1919, p. 342 (diagnosis). 



Orthotype. — '"'' PoHchthys plectrodon Jordan and G:i\h&vt=Batrachiis 

 porosissimus Cuv. & Val." 



We follow Jordan in distinguishing generically between the single 

 Atlantic species and the several Pacific forms commonly referred to 

 Porichthys. The prime difference lies in dentition. In Porichthys 

 the palatine and premaxillary teeth as usual in fishes are directed 

 slightly backward, whereas in Nautopaedium the palatine teeth are 

 directed forward in the adults of both sexes and the posterior pre- 

 maxillary teeth are directed forward in the adult male. Both the 

 palatine and the premaxillary teeth are much more enlarged in the 

 adult male than in Porichthys. Tlie few (usually 3 to 6) developed 

 palatine teeth are confined to the front of the bone, instead of being 

 spread along the entire edge. Meek and Hildebrand (1928, p. 922) 

 did not accept the genus, and we do not regard it as very trenchantly 

 distinct. 



