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



3o. Gill rakers numerous, total including all rudiments more than 27. (Remora.) 



Remora remora (Linnaeus) 

 3b. Gill rakers fewer, total including all rudiments less than 21. 



4a. Disk laminae numerous, more than 24; total giU rakers 17 to 20; plate 



131, F. (Whalesucker.) Remora australis^^ (Bennett) 



4/>. Disk laminae less than 20; total gill rakers 11 to 17. 



5a. Pelvic fins broadly adnate to abdomen; disk laminae 15 to 19; pectoral 

 fin rays 20 to 27; vertebrae 27. 

 6a. Dorsal fin rays 27 to 34; disk smaller, its length 28 to 40 percent of 

 standard length; disk not extending posteriorly as far as 

 end of depressed pectoral fin; distal two-thirds of pectoral 

 rays flexible; pectoral rays 23 to 27, with a simple branch 

 extending to tips, the rays not free from membrane near tips; 

 plate 131, D. (Spearfish remora.) 



Remora brachyptera (Lowe) 22 

 66. Dorsal fin rays 20 to 26 ; disk larger, its length 37 to 49 percent of 

 standard length; disk extending posteriorly well beyond end 

 of depressed pectoral fin; pectoral rays stiff to their tips in 

 specimens larger than about 150 mm.; pectoral rays 20 to 24; 

 tips of pectoral rays multibranched, the rays free from the 

 membrane near tips; plate 131,E. (Marlinsucker.) 



Remora osteochir 23 (Cuvler) 



5b. Pelvic fins narrowly adnate to abdomen; disk laminae 13 or 14; 



pectoral fin rays 18 to 21; vertebrae 26; plate 131, G. (White 



suckerfish.) Remorina albescens 2^ (Temminck and Schlegel) 



Genus ECHENEIS Linnaeus 



Echeneis Linnaeus, Systema naturae, ed. 10, p. 261, 1758 (type species, Echeneis 



neucrates emended to nmicrates) . 

 Leptecheneis Gill, Proc. Acad. Nat. Sci. Philadelphia, vol. 16, p. 60, 1864 (type 



species, Echeneis neucrates Linnaeus). 



Vertebrae 14 + 16=30; disk laminae numerous, ranging from 18 to 

 27; no palatine teeth; oral denticles present; body comparatively 

 elongate, slender, but deeper than in Phtheirichthys. Body with dark, 

 lateral, horizontal stripe. This genus contains two species, E. 

 naucrates with a world-wide distribution in all tropical seas, and E. 

 neucratoides , apparently restricted to the western Atlantic Ocean. 

 They are inshore forms, occurring typically in shallow water. 



ECHENEIS NAUCRATES Linnaeus 



Plate 131, A 



Echeneis neucrates Linnaeus, Systema naturae, ed. 10, p. 261, 1758. (Spelling 

 incorrect, emended to naucrates, see Opinion 242, Int. Comm. Zool. Nomencl., 

 vol 5, pp. 23-44, 1954. Type locality, "Pelago Indico.") 



21 Echeneis australis Bennett, Narrative of a whaling voyage around the globe . . ., vol. 2, p. 273, 1840, 

 type locality, not given). 



" Echeneis brachyptera Lowe, Proc. Zool. Soc. London, p. 89, 1839 (type locality, Madeira). 



*' Echeneis osteochir Cuvier, Regne animal . . ., ed. 2, vol. 2, p. 348, 1829 (type locality, not given). 



2< Echeneis albescens Temminck and Schlegel, Fauna Japonica, Pisces, pt. 6, p. 272, pi. 120, fig. 3, 1850 

 (type locality, Nagasaki, Japan). 



