CETACEA. 207 



than those of the preceding;; the muzzle is also longer and more 

 compressedj its origin is not known. 



D. plumbeus,Tiussum. The muzzle with the same compressed 

 form, but armed throughout with thirty-seven teeth. From 

 Malabar.(l) 



D. velox, Dussum. A somewhat longer muzzle, and forty-one 

 teeth throughout. From Ceylon. 



D. longiroslris, Dussum. Surpasses even the Common Dol- 

 phin in the number of its teeth, having from fifty-five to sixty 

 throughout. From the coast of Malabar.(2) 

 M. de Blainville separates from this first division of Dolphins, 

 under the name of Delphinorhynchus, those species in which the 

 snout, though long and slender, is not separated from the forehead 

 by a decided furrow. One of them, 



D. micropierus, Cuv,, was thrown upon the coast of France ; 

 it is remarkable for its dorsal fin, which is also placed very 

 far back. It grows to the length of fifteen feet, and loses all its 

 teeth at an early age. (3) 



D. rostratus, Cuv. A slender muzzle, and externally all of a 

 piece with the headj twenty-one teeth throughout. Its dorsal 

 fin is of the usual size. (4) 



D. gangeticus, Roxburg, (The Dolphin of the Ganges) should 

 be distinguished from this first group. Its spiracle is longitu- 

 dinal, and the jaws slender and inflated at the end. It ascends 

 the Ganges to a great distance, and is probably the Platanista 

 of Pliny. 



PnociENA, Cuv. 

 The Porpoises(5) have no rostrum, but a short, and uniformly con- 

 vex m.uzzle. 



(1) I suspect this D. plumbeus to be the same as the D. malaianus of MM. 

 Lesson and Gai-nier, Voy. de la Coq. pi. ix, f. 5. 



(2) We cannot, in this work, give a place to species which have been only seen 

 at a distance, and of which no part has been produced; we therefore mention, 

 merely as indications, the D. albigena, Quoy and Gaym., Yoy. de Freyc. pi. xi, or 

 D. superciliosus. Lesson and Garn., Voy. de la Coq. pi. ix, f. 2. The D. cruciger, 

 Quoy and Gaym. lb. f, 3 and 4, which is at least closely allied to theD. bivittatus. 

 Less, and Garn. f. 3. The D. lunatus. Less, and Garn. f. 4. Still less can we admit 

 species which have not even been figured. 



(3) Blainville, Nouv. Bullet. desSc. IV, p. 139, andFr. Cuv. Mammif. under the 

 very improper name of jD. de Dale, which belongs to the Hyperoodon. 



N.B. The D. rostratus of Shaw is the gangeticus. 



(4) Add the Dauphin courmn^, Freminvdle, Nouv. Bullet, des Sc. Ill, No. 56, 

 pi. 1, f. 2. 



(5) Porpoise, from porcus piscis^ hog-fish. 



