1918.] 



NATURAL SCIENCES OF PHILADELPHIA. 



57 



Gill-opeiiing forward about opposite front pupil edge. Rakers 

 4+16, lanceolate, slender, about long as filaments or 2h in eye. 

 Pseudobrancliise about long as gill-filaments. Isthmus narrowly 

 constricted, short. 



Scales ctenoid, narrowly imbricated, in even lengthwise rows, 

 little smaller along body rows. Fins all scaly basally. Suprascapula 

 thin, entire. Cheek with 2 rows of scales. Scales on opercles 

 moderate, small on top of head. Lips, snout broadly, preorbital 

 and suborbitals naked. Broad scaly flap between ventral bases 

 about half length of fin. Ventral axilla with small pointed scale 



Fig. 22. — Abudefduf parasema sp. nov. 



about 3 in spine. Height of large humeral scale equals f of eye- 

 diameter. Lateral line with upper branch curving up at first and 

 then follows concurrently along back with upper limits of general 

 squamation, though continues as several simple pores to caudal 

 peduncle. Pores in horizontal section small, inconspicuous and one 

 in middle of each scale exposure, not on caudal base. 



Spinous dorsal inserted opposite pectoral origin, spines graduated 

 up to fifth, then subequal, fin edge well notched and slight cutaneous 

 point beliind each spine tip. Soft dorsal origin at last third between 



