322 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



11. Serranus lamprurus, sp. uov. ('29651.) 



Subgenus Plectropoma Cuvier; allied to Serranus chlqrurus C. & V. {Plectropoma 

 chlorurum C. & V.), but with considerably larger scales. 



Body short aud deej), compressed, the back elevated, the ventral out- 

 line from lower jaw to front of anal, little arched; profile convex from 

 dorsal to occiput, thence concave above eye, the snout low and acute in 

 profile. jMouth large ; maxillary about half length of head, reaching 

 to below the middle of the eye, the premaxillary in front rather below 

 the level of the lower edge of the eye; preorbital narrow ; jaw^s sub- 

 equal, the lower slightly included; teeth strong, the anterior canines 

 stronger than those of the sides of the jaws, about 4 in the upjier jaw 

 and G in the lower; teeth all fixed. Cheeks with 5 rows of scales; top 

 of head and both jaws scaleless. Eye large, about equal to snout and 

 broader than interorbital space, about 3^ in head (doubtless smaller in 

 adults). Vertical limb of i)reopercle nearly straight, the teeth growing 

 larger downwards ; angle and lower limb with about 9 strong radiating 

 teeth, those nearest the angle largest, the anterior directed more aud 

 more forwards. Opercle with two flat points. Gill-rakers moderate, 

 slender, nearly as long as pupil. Dorsal spines strong, the fourth the 

 highest, about equal to soft rays and 2^ in head; the last spine consid- 

 erably shorter than soft rays. Caudal emarginate, 1| in head, the mid- 

 dle rays little shorter than the outer. Anal spines strong, the second 

 longer and stronger than the third, 2f in head. V^entrals long, If in 

 head, nearly reaching anal. Pectorals about reaching anal, IJ in head. 

 Scales above lateral line in series parallel to lateral line. Head 2f in 

 length; depth 21. D. X, 13; A. Ill, 8; scales G-46-13. 



Color black with violet luster; faint pale streaks formed by paler 

 spots along rows of scales on lower part of body. Entire caudal fin 

 abruptly translucent; pectoral nearly colorless; tips of spines of dorsal 

 and .anal, and terminal portions of soft rays, abruptly whitish. Yentrals 

 black. 



A single specimen, three inches in length, was taken in a tide-pool in 

 Panama Bay. It would be a species of '''■Hypoplectrus'''' in Professor 

 Gill's arrangement of the Serranoids. 



12. Diabasis steindachneri, sp.uov. (29305, 29387 from Panama, 28172, 29226, 29634, 

 29759, 29778, 29795 from Mazatlan.) 



{Hamulon caudimacula Steindacliner, IchthyoL Beitriige, iii, 15 (Acapulco, Rio 

 Janeiro, Rio Grande do Sul, Marauhao, not of Cuv. &, Val., v, 236, 18'60 =: Diabasis 

 parrw Desm. )* 



* The HcKinnlon caudimacula is imperfectly described by Cuvier and Valenciennes. 

 We are indebted to Dr. H. E. Sauvage, of the Musenm d'Histoire Naturelle of Paris, 

 for the following important information concerning the species: 



There are in the Museum of Paris three specimens of Hwmulon caudimacv.la, viz, 

 from Brazil by Delalande, from Bahia by Castelnau, and from Cnlta by Desmarcst. 

 The diagnosis of this latter specimen, the type of the species aud the type of Diabasis 

 parrcv Desmarest, is as follows : 



D. Xr, I, 15; A. Ill, 7; Lat. 1. 49. 



Height of the body equal nearly to the length of the head, aud 3^ iu the total 



