284 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



DiABASis, (Scudder MSS., Putnam, I. c. {aJhvm) (name only). 

 Anaemostus, (Scudder MSS.) Putnam, I. c. (name only ; flavolineatum, etc.). 

 Bathystoma, (Scudder MSS.) Putnam, I. c. (name only: jeniguano, etc.). 

 Brachygenys, (Scudder MSS.) Poey, Synopsis, Piscium Cubensium, 1868, 319 (name 



only; toBniatum). 

 Lythrulon, Jordan & Swain (8uT)genus nova ; flavoguttatum). 



HiEMULON, Cuvier «fc Valenciennes, Giinther, Gill, Steindachner, Poey, Goode et auct. 

 DiABASiS, Bennett, Bleeker, Jordan & Gilbert, Bean et auct. 



ANALYSIS OF SPKCIES OF HiEMULON. 



a. Scales above lateral line arranged in very oblique series, not parallel with the 



lateral line. 

 h. Jaws subequal, or the lower included ; mouth little oblique ; gill-rakers compar- 

 atively few and short, 

 c. Dorsal spines 12 (sometimes 11 in H. scuddei-i) ; scales large ; gill-rakers few 



and small (10 to 14 on lower part of anterior 

 arch). 

 d. Mouth moderate or large, its cleft more than one-third length of head ; back 



more or less elevated ; second anal spine 

 strong, notably longer than third (ficemuZon). 

 e. Scales below lateral line anteriorly not especially enlarged. 

 /. Scales above lateral line anteriorly not much enlarged. 



g. Maxillary about two-fifths length of head, not reaching center of eye 



(in adnlt). 

 h. Back and sides without yellow or blue stripes ; each scale above 



with a median blackish spot, these forming 

 undulating lines (spots rarely obsolete); 

 maxillary about 2\ in head. 

 i. Snout long, pointed, more than two-fifths length of head ; preor- 



bital very deep, its least breadth greater 

 than length of eye (in adult); back elevated; 

 profile usually more or less concave above 

 eye; mouth large, the maxillary not reach- 

 ing front of eye in adult ; anal rather high. 

 j. Sides with about six dark vertical bars; sides of head with black- 

 ish spots like the body Sexfasciatdm, 1. 



jj. Sides without dark bars ; head unspotted. 



k. (Color grayish ; side with a median longitudinal band from 

 eye to upper part of tail ; two or three dark 

 bands above this and one below ; second 

 anal spine little longer than third.) 



Macrostoma, 2. 



Tele. Color pearly or grayish, immaculate, or with email dark spots 



, and a faint dark lateral band ; anal fin low, 



its first soft rays when depressed not reach- 

 ing tips of last rays ; second anal spine 

 longer than third ; preopercle finely serrate. 



GiBBOSUM, 3. 



a. Snout shorter, less than two-fifths length of head ; preorbital nar- 

 rower, its least width not more than length 

 of eye ; back elevated ; profile not concave ; 

 maxillary reaching about to front of eye in 

 adult ; spots on scales distinct, forming un- 

 dulating streaks ; bead unspotted. 



