1883.] NATURAL SCIENCES OF PHILADELPHIA. 287 



in the same museum, which have been identified, apparently 

 correctly, as Heemulon modestum Tschudi. This identity has 

 been already noticed by Dr. Hilgendorf (MSS.). Tschudi's 

 original type is said to be in tlie museum at Neufchatel. 



It is doubtful whether the specimen examined by Prof. Peters 

 really came from Maz'i^tlan. 



The following is a redescriptiou of the type of Pristipoma 

 notatum : 



Head 3^ in length to base of caudal; depth 2|. D. XII-15 (not 

 XVIII, as stated by Peters ; A. III-12 ; 51 or .52 scales in a longi- 

 tudinal series ; 10 rows between front of dorsal and lateral line. 



An ally of Pomadasi/s caesius. Body ovate ; anterior profile 

 regularly convex ; mouth small ; outer teeth in both jaws enlarged ; 

 maxillary 3f in head ; lips thick ; eye 3f in head ; preorbital 1§ 

 in eye ; preopercle coarsely serrate ; scales above lateral line unu- 

 suall}' small, arranged in oblique series, not parallel with the 

 lateral line. 



Pectoral fin as long as head ; second anal spine much stronger 

 than third, and somewhat longer, both much shorter than the 

 soft rays; second anal spine If in head ; dorsal spines low and not 

 strong, the fin deeply notched ; fourth dorsal spine 2^ in head ; 

 soft dorsal scaly at base ; upper lobe of caudal longest. 



Color bluish gray, silvery below ; edge of opercle black ; a con- 

 spicuous jet-black spot at base of last rays of anal and dorsal; 

 entire axil of pectoral, and a large roundish blotch before it, jet- 

 black ; ventrals blackish. 



16. Diabasis sexfasciatus (Gill) Jor. & Gilb. 



As already supposed by us, the type of Haemiilon macalosum 

 Peters is identical with Hf^mulon sexfasciatum Gill. 



17. Paralonchuras petersi Boeoiirt. 



Type, La Union, San Salvador. 



Onl}^ the original type of this species is yet known. It is 

 apparently closely related to the genus Lonchurus^ diflfering exter- 

 nally in the presence of several barbels instead of two. 



Body long and low, formed as in Menticii-ruii. Head slender, 

 low, with protuberant snout, flattish and somewhat spongy to 

 the touch above. Preopercle with dermal serrations ; mouth 

 horizontal, overlapped by the snout ; teeth in villiform bands ; 

 upjDer jaw with a conspicuous outer row of larger teeth ; gill-rakers 



