CETACEA, 101 
a Delphinus ceeruleo-albus, Meyen, Act. Nat. Cur. xvi. 609. t. 43. 
 £.2; Gray, Zool. E. & T.42; Reichenb. Cetac. Anat. t. 19, 
skull. 
_ Inhab. East coast of South America, Rio de la Plata. 
Length 5 feet 6 inches. Skeleton in Mus. Anat. Mus. Berlin. 
Skull: beak } longer than the length of the brain-cavity, and 
rather longer flies double the width of the skull at the notch ; teeth 
_ to the notch: see fig. Reichenb. 
5. LAGENORHYNCcHUs Asia. The AsIA. 
__ Skull: nose rather depressed, broad, flattened, rather contracted 
_ in the middle of each side ; triangle concave, _ a shghtly 
raised, flat, rugose space in the front half; teeth 24, small. 
E Lagenorhynchus Asia, Gray, Zool. Ereb. & Terror, t. 14, skull. 
_ Inhab. 
a. Skull. Teeth wanting. 
__. The specimen figured in the Voyage of the Erebus and Terror, 
m t. 14. 
___ The skull, which is without teeth, very much resembles in the 
_ depressed and expanded form of the brain-cavity and shape of the 
beak, the skull of L. Electra, but it differs from it in the beak 
; being rather more acute in front and more contracted on the 
_ middle of the sides, and in being rather smaller im size. It may 
_ only be a variety of that species. It measures as follows :— 
Skull: Length, entire........ 162 inches. 
ah ef atose a8 cay 9 33 
as) Oedower Totes: LIZ 
Width at orbit ...... Son 
Ms a wotels: J0A09 42° ",, 
» middle of beak. 33 ,, 
6. LAGENORHYNCHUS AcuTUS. EscHricut’s DoLPHiIn. 
a. Teeth 3 $2 nose of skull half its length and nearly twice as long 
as wide at the notch; lower jaw obliquely truncated in front. 
_ Delphinus (Grampus) acutus, Gray, Spic. Zool. 2,1828, from a 
skull ; Fischer, Syn. Mam. 656. 
- D. Esehrichtii, Schlegel, Abh. 23. t. 1 & 2. f. 4, t. 4. f. 5. 
_ Delphinus leucopleurus, var. Nilsson, Skand. Fauna, i. 598. 
_ Lagenorhynchus acutus, Gray, Zool. E. & T. 36. 3 
_ Inbab. North Sea, Faroe Islands, Eschricht. 
