23. EauuLA. 499 



the head 4-4^ ; the upper profile is angular, A pair of small spines 

 above the anterior margin of the orbit ; the cavity on the head is 

 subquadi-angular, much broader anteriorly than posteriorly, its width 

 between the spines being 1| in its length. The lower prseopercular 

 margin is sen-ated, and its length is If in that of the mandibula. 

 The mandibula is very concave, and ascends at an angle of about 45°. 

 The length of the second dorsal spine is three-quarters of that of 

 the head. Scales very smaU, but conspicuous. The spinous dorsal 

 without black ; base of the pectoral brownish. 

 Eed Sea ; East Indian (and Australian) Seas. 



a. Adult. Eed Sea. 



b. Half-grown. Bengal. From the Collection of the East India 



Company. 



c. Half-grown : bad state. Madra.s. Presented by T. C. Jerdon, 



Esq. 



d. Adult : bad state. Calcutta. Fi-om the Collection of Messrs. von 



Schlagintweit. 



e. Fine specimen. Amboyna. Purchased of Mr. Frank. 



/. Half-grown. India. Presented by G. R. Waterhouso, Esq. 

 g-i. ? Half-grown : half-destroyed. Austi-alia. Presented by Sir J. 



Richardson. — Types oi-Equula serrulifera. 

 k. Adult. 



I, m. Half-grown ; bad state. From the Haslar Collection, 

 n. Large specimen : skin. From Gronow's CoUeetion. 



3. Equula eaballa. 



Scomber equula, Forsk. p. 58 ; Bl. Schn. p. 36 ; SJiaw, Zool. iv. p. 596. 

 Centrogaster equula, L. Gm. p. 1337. 

 Cffisio equulus, Lacep. iii. pp. 85, 90. 

 Eussell, pi. 62. 



Equula eaballa, Cuv. >Sr Val x. p. 73 ; Riippell, N. W. Fische, p. 51 ; 

 Cantor, Catal. p. 146, 



B,5. D,A. A.^. 



The height of the body is twice in the total length, the length of 

 the head 3|. A pair of small spines above the anterior margin of 

 the orbit. The lower prseopercular margin is finely serrated ; the 

 mandibula veiy concave. The length of the second dorsal spine 

 equals that of the head. Scales very conspicuous. The spinous 

 dorsal without black ; axil blackish. 



Red Sea ; East Indian Seas. 



I should not hesitate to consider this species as identical with E. 

 edentula or E. dussumieri, if it were not for the greater length of 

 the head, expressly stated by Valenciennes, Still more doubtfid is 

 the species described by Cantor as Equula eaballa; he says, that 

 the length of the head is contained 3| in the total, but he takes 

 the latter from the snout only to the centre of the caudal margin. 

 The other character, taken by Dr, Cantor from the relative length 

 of the anal spines, is not of much value. The following specimen, 



2k 2 



