22 PEOFESSOK OWEN OX INDIAN CETACEA. 



In colour it presents a well-marked distinctive character from all the Vizagapatam 

 species; it is of a deep, shining, plumbeous black on the upper part, becoming 

 paler near the belly, which, from the under part of the jaw to the perineum, is 

 ashy grey, with irregular spots or blotches, whence the specific name maculiventer. 

 The specimen from which tigs. 1 and 2 were taken was a female, 6 fest 11 inches in 

 length, found at Waltair, 26th April, 1854. It is called by the fishermen " Suwa." 



The fronto-rostral groove is well marked, but short; the " rictus oris" slightly rises as it 

 extends back, to about 3 inches below the fore part of the eye ; the under jaw extends be- 

 yond the upper, and chiefly forms the obtuse end of the rostrum ; this is 5 inches in length, 

 and higher at its base than it is broad. The blow-hole resembles in position and shape 

 that of the previously described species. Both pectoral and dorsal are falcate, but small ; 

 the length of the front border of the pectoral, following the curve, is 1 foot 3 inches ; 

 from the end of the snout to tlie settmg-on of this tin measures 1 foot 9 inches. The 

 greatest cuxumference of the body is just in advance of the dorsal fin ; the height of 

 this fin is 8 inches, the extent of its basal attachment 18 mches ; to the fore part of the 

 dorsal from the end of the snout, in a straight line, is 3 feet 4 inchjes ; from the back 

 part of the dorsal to the hind border of the base of the caudal fin is 3 feet. The body 

 is more compressed than in B. lentiginosm (PI. V. fig. 3). The girth of the pedicle of 

 the caudal fin is 1 foot 2 inches ; the fore-and-aft diameter of the fin is 7 inches, the 

 extreme breadth is 1 foot 8 inches ; from the median notch of the caudal to the vent is 

 2 feet 3 inches ; extent of perineum (or between the vent and vulva) 3 inches. 



The dentition of this species is ^^^Ejo— -'-•'- ^- ^^ appears not to be rare. Specimens 

 were taken in March 1853 and April 1854, all showing the character of colour given 

 in the female figured in PI. VI. figs. 1 & 2. 



Delphinus (Lagenorhynchus) fusiformis, Owen. 



Spindle-shaped Dolphin. (Plate V. fig. 1.) 

 The present species is more slender in proportion to its length, has a less elevated and less 

 convex forehead, a proportionally thicker, broader, and more obtusely terminated snout, 

 a deeper mandible or under jaw, especially posteriorly, and smaller dorsal and pectoral fins, 

 especially the latter, than in the foregoing species of Delphinus. It appears, likewise, to 

 be a smaller species. The specimen figured, which was the largest taken (at Waltair, on 

 the 23rd August, 1853), was a female, 6 feet in length: the dentition |YEr|i = 86. The 

 greatest girth of the body is at the fore part of the dorsal fin ; from this the body 

 tapers to both ends, and, through the lower forehead and thicker snout, more regularly 

 than in D. r/adamu, and presenting a truer spindle-shape of the whole animal, whence the 

 specific name. The " rictus oris" bends upward as it recedes, and does not approach so 

 near the eje as in D. gadamu. Both the angle of the mouth and the eye are more 

 elevated in position ; the blow-hole is medial, symmetrical, on the same vertical parallel 



