104 • NATURAL HISTORY. 



liind edge of the pectoral fin ; it is falcate in shape and measures 

 along the curve to tip, 25 inches ; the greatest width to hind pro- 

 longation at the base 15*75 inches. Pectoral fin 18 X 12 inches, or 

 one-third longer than broad. Second dorsal arises from opposite the 

 anal ; it is triangularly concave behind, and not straight as depicted 

 in the plate of Zygoena malleus, Blochu and Ztudes in Day's Fishes 

 of India, and has also an elongated process at base. Ventral fin 

 11 X 10'5 inches, also triangularly concave behind, and not straight 

 as in the malleus. Anal fins 7 X 11 inches, concave behind, the 

 distance from its insertion to the tip of the elongate process of the 

 ventral 5 inches. A pit at the root of the caudal, upper caudal lobe 

 falcate, lower proportionately longer than in the other species. 

 Colours brownish grey throughout, except a width of 10 inches on 

 the under surface, where it is white, also the under surface of the 

 hammer. 



The following are the measurements of this species taken in the 

 flesh :— 



Feet, inches. 

 Total length to tip of upper caudal lobe .. . 10 2^ 



Length of upper caudal lobe 3 H 



„ lower „ „ 1 3£ 



Height of 1st dorsal over curve 2 1 



,, „ (vertical) to tip 1 9 



Width of „ to tip of elongate 



process 1 3 



Height of 2nd dorsal 8 



Width of „ 11 



Length of pectoral fin ] 6^ 



Width „ „ 1 



Length of ventral fin 11 



Width of „ „ 10| 



Anal fin, length 7 



„ „ width 11 



Diameter of eye, 1*25 inches; width of mouth, 9 # 75 inches. 

 Hindmost (5th) gill opening smallest. 

 Locality. — Kurrachee. Captured on 20th April 1884. 

 This species differs from all the known forms, first, by having 

 its teeth serrated on the edges instead of smooth ; and, 

 second, in having no prolonged groove along the entire front 

 margin of the hammer. From Z. Malleus by the less curvature of the 



