GILBERT AND STAEKS — FISHES OF PANAMA BAY 97 



ence, however, in the relative lengths of the second and third anal spines, and very 

 little difference in the length of the gill-rakers. A. vmltiguttatus has the gill- 

 rakers a trifle longer than in A. afer, but they do not exceed two-thirds the length 

 of the gill-filaments. 



171. Mycteroperca boulengeri Jordan & Starks. 



Probably rare; only two specimens taken, each about 23 cm. in length. 



AVe make the following corrections to the original description, and to the 

 description given by Jordan and Evermann (1896, p. 1175): 



Head 2|- in length (2[ in type, 30 cm. long); depth 3| (2^ in type). In our 

 specimen, and in the type and co-types (3 specimens) from Mazatlan, the dorsal is 

 constantly XI, 16, the anal III, 11. Scales 23-90-44; ctenoid posteriorly, becoming 

 cycloid anteriorly. Snout 4 in head; eye o| {Q>\ in type); longest anal ray 2 (1^ 

 in type) ; third dorsal spine 3. 



172. Hypoplectrus lamprurus {Jordan <i- Gilbert). 

 Only the type is known, obtained by Gilbert in 1881, at Panama. 



173. Paralabrax humeralis {Cuvier ifc Valenciennes). 



Young specimens of this species are recorded from Panama by Steindachner 

 (1876, b, p. 4) as Serranus albomaculatus. 



174. Diplectrum radiale {Quoy S Gaimard). 



Occasional in the Panama market, not taken by us about rocky reefs or islands. 

 There are constantly 10 series of scales on the cheeks running obliquely downward 

 and forward; 5i to 6 scales in a series between lateral line and base of dorsal near 

 the middle of the length; and seven articulated rays in the anal fin. There is but 

 little variation in the size and spination of the preopercular lobe, the species being 

 readily distinguishable from I), macropoma and D. eurypledrum by this character 

 alone. 



175. Diplectrum macropoma {Guniher). 



No specimens of this species were secured by us. It seems to occur abun- 

 dantly a short distance from the shore, where it was dredged by the "Albatross" in 

 depths of from 7 to 33 fathoms. A single specimen was said to be found by them 

 in the Panama market. Its range seems to be co-extensive with that of the tropical 

 fish-fauna in general, as it was obtained by the "Albatross" in 1889 at Station 3014, 

 off Guaymas, Gulf of California, 29 fathoms, and at Station 3039, off Magdalena 

 Bay, Lower California, 47 fathoms. 



The species is very close to J), radiale, but differs constantly in the wider 

 preopercular lobe, the larger scales on cheeks (6 or 7 rows), and the lai-ger head 

 and deeper body. There are constantly 7 anal rays. The colors in life have not 



