Hubbs — A Revision of the Viviparous Perches. 11 



p. — "Lower lip thin, normal, entire, with a frenum" ; 

 gill-rakers short. 

 g l . — Posterior rays of anal in male greatly elevated ; 



teeth less bluntly conic . Ditrema temminckii Bleeker.* 

 g' 1 . — Posterior rays of anal in male not greatly ele- 

 vated; teeth blunter and coarser . . . . Embiotoca. 

 h 1 . — Caudal vertebrae 18 or 19; first haemal spine a 

 little weaker than the second; anal rays III, 24 

 to 26; colors variable, of both reddish and green- 

 ish types . Embiotoca {Embiotoca) Jacksoni Agassiz. 

 h?. — Caudal vertebrae 20 to 22; first haemal spine 

 usually less reduced in size; anal rays III, 28 to 

 31 ; colors, reddish with blue streaks 



Embiotoca (Taeniotoca) lateralis Agassiz. 

 e 2 . — Abdominal vertebrae 17 or 18; abdomen long, the 

 anus being located well behind middle of body, exclud- 

 ing the head and the caudal fin ; anal fin with an unus- 

 ually short, oblique, posteriorly inserted base 



Hypsurus caryi (Agassiz). 

 d 2 . — Outline of the spinous dorsal inclined, the spines being 

 graduated, long and slender; body more slender, the caudal 

 peduncle longer; caudal fin deeply forked. 

 i 1 . — Lower jaw with well developed teeth; gill-rakers 

 very short ; lower lip with a frenum ; caudal vertebrae 

 23 or 24; first haemal spine large; colors silvery 



Phanerodon furcatus Girard.t 

 i 2 . — Lower jaw with few or no teeth ; gill-rakers long and 

 numerous; lower lip without a frenum 



Neoditrema ransonnetii Steindachner. t 

 c 2 . — Dentigerous surface of lower pharyngeals convex ; soft rays 

 of dorsal abruptly higher than the low spines ; first haemal 

 spine applied to the second 



Damalichthys argyrosomus (Girard). 

 W. — "Scales large, 36 to 50 in lateral line; soft dorsal and anal 

 shortish; size small." 



j 1 . — "Lower lip thin, without frenum; gill-rakers 



long and slender. " . Cymatogaster aggregatus Gibbons. 

 f. — " Lower lip thin, with a frenum." 



* Ditrema laeve Giinther, Ditrema smitti Nystrom, and Ditrema temmincki jordani 

 Franz, all appear to be synonyms of this Japanese species. Should this genus prove 

 inseparable from Embiotoca, then the family name should become Ditremidae. 



tA second species, P.atripes, is recognized. It is taken in comparatively deep 

 water off the California coast, and is supposed to differ from P. furcatus chiefly in color, 

 the pelvics being tipped with blackish, the sides of the body being marked with reddish 

 streaks. 



Fin-rays in 25 specimens of P. furcatus from San Francisco: D. X or XI, 23 to 25 

 (rarely 26) ; A. Ill, 30 to 33 (rarely 29 or 34) . 



X Japanese ; not closely related to Hypocritichthys, as is currently stated. 



