100 CETACEA. ee: 
in, lin. £5 
Length to pectorals ........ 20 0 Oy 
5. / he FRE PCRPONSEL Pw jass ch ie aoe . 
wai |. () SROUOOTBAL 41, bin a hereto 41 0 
vit SOL ORREL: %.). <3 earnoee ll 6 
Height of dorsal .s «6 << 10 0 
Watt Ol dant: tk cb becasue ee 2.50 
Shull: Length, entire. ins )-eheir pidane 18 0 
ral Of nose. |. dks eee 8 6 
Width at orbit... 4. +) oe A 
ee BGS RES ue oe ee 5 en 
» of middle of beak .... 3 6 
s» Of lower jaw at condyles 8 0 
ttt Nose of skull longer than the length of the brain-cavity; j 
teeth-line some distance from the notch. i 
3. LAGENORHYNCHUS ELECTRA. The ELEcTRA. 
Skull rather depressed; nose flattened above, expanded and — 
reflexed on the side behind, rather shelving in front ; sides rather — 
contracted in the middle, rather longer than the head, and 13 the © 
length of the width at the notch ; itermaxillary broad, flattened, — 
nearly 3 of the width, with a large, wide groove for the greater — 
part of its length; triangle fiat, rather concave behind, with a — 
lozenge-shaped, rather raised, rugose space in the front half; 
teeth 2%, rather small, cylindrical, conical, slightly curved, acute, — 
four in an inch; the lower jaw regularly converging, straight on — 
the sides in front, rather swollen behind, and shortly obliquely 
truncated in front, the gonyx rather produced. 
Lagenorhynchus Electra, Gray, Zool. Erebus and Terror, 35. 
t. 13, skull. . 
Inhab. ——? 
a. Skull ——? Purchased. 4 
The specimen figured in the Voyage of the Erebus and Terror. 
Skull: length, entire, 171 inches; of head, 81; of nose, 9%; — 
of teeth line, ce of lower jaw, 141; width of temple, 104 mches; 
‘at notch, 53; at middle of beak, 4; of intermaxillary, 22. a 
~ This skull is very like the former, but it is considerably larger, 
and the nose is longer in proportion, and the head is mueh more 
depressed in the middle and spread out on the sides. 
4, LAGENORHYNCHUS CHRULEO-ALBUS. : 
Teeth #8; white, back bluish, with oblique streaks on the sides, ; 
belly white. . + ia 
