68 Zoological Society. 



the dorsal ; its base is about half as long as that of the dorsal fin. 

 The caudal fin is deeply emarginate ; its membrane has scales upon 

 it between the rays. 



The lateral line rises slightly on the shoulder, then descends 

 gently to the middle of the height, and from a little behind the 

 middle of the total length it is horizontal. The scales are very small, 

 cycloid, and concentrically striate ; those of the lateral line are about 

 160 in number. 



The single individual from which these characters have been drawn 

 up, though bearing considerable resemblance to S. Berthelotii (which 

 occasionally occurs at Madeira), is sufficiently distinct from that and 

 other known members of the genus to warrant the definition of a 

 new species. From S. Berthelotii it is easily distinguished by the 

 smaller scales, the longer body (height to length as 1 to 4^, instead 

 of 1 to 3), the shorter head (head to length as 1 to 5, instead of 1 to 4), 

 the longer snout (equal to lg diam. of the eye, whereas in S. Berthe- 

 lotii it is less than one diameter of the eye), by the shorter pectoral 

 and ventral fins only reaching about halfway to the vent (whereas in 

 S. Berthelotii they extend backwards as far as the vent), and by the 

 commencement of the dorsal fin being placed behind the root of the 

 pectorals, whereas in S. Berthelotii that fin commences considerably 

 in front of that point. A thick purple fluid exuded from the vent of 

 the dead fish ; and the same thing has occurred in the case of all the 

 specimens of &. Berthelotii that have occurred. The fishermen give 

 to both these species the name of " Praga." 



The total length of the specimen (which was taken in the month 

 of April last) is Hy 7 ^ inches ; the height between the ventrals and 

 the vent is 3y^- inches, and its thickness thereabouts is \jr inch. 

 The dimensions of the principal parts are expressed in inches in the 

 following table : — 



Length of head 2 T 8 T5 - 



Diameter of eye, rather more than -| 



Dorsal, length of base 6^ 



, height at middle -| 



, distance from snout 3f 



Pectorals, length 1^ 



, breadth of base ^ 



, distance from snout 3^- 



Ventrals, length , 1£ 



Vent, distance of its vertical from snout 6£ 



, distance from anal \ 



Anal, length of base 3^ 



, height in front Y&y 



Caudal, length of longest rays 2% 



Fam. TriglidjE. 

 Setarches, gen. nov. 



Head and body compressed ; no transverse groove at the occiput ; 

 vertex without spines ; preoperculum armed ; body covered with 

 cycloid scales ; without skinny appendages. One dorsal fin, divided 

 by a notch into a spinous and a soft portion. No pectoral appendages. 



