Cetacea. MAMMALIA. Cetacea. cxxix 
in this connection : “ Mr. Flower considers B. bore- 
alis, Oope [Proc. Acad. JSfat.ScL, Phila., 1866), from 
North Atlantic, as very nearly allied to Balaenoptera 
schlegelii.” 
SCHLEGEL’S FINNEK WHALE {Sibialdius schle- 
gelii. Gray). — Balaenoptera schlegelii of Van Bene- 
den. Habitat, Java. 'I'he cervical vertebrae in this 
species are separate. 'I’he beak of the skull is very 
long, being three and a half times the length of the 
brain cavity. 
THE ANTARCTIC FINNER WHALE [Siblaldkis (?) 
antarcticus, Gray). — Balaenoptera antarctica of Van 
Beneden, who regards it as a doubtful species. Hab- 
itat, Buenos Ayres. 
THE SULPHUR-BOTTOM TINNER WHALE [Sib- 
baldius sulphureus, Cope). — 'I'he whalers of the 
north-vvest coast designate this species as above. 
Captain Scarnmon gives a figure and full description 
of the animal. 'I'he dorsal fin is very far back. It 
inhabits the North Pacific and North-west Coast, of 
America, as far south as California. Sibbaldius 
tectirostris. Cope, inhabits the North Pacific. 'I’he 
skeleton is in the Museum at Philadelphia. Sibbal- 
dius tuberosus. Cope, and S. laticeps of same author 
in earlier paper, inhabit the North-east Coast of 
North America. 
Family— BAL/ENO P'l’ERIDiE. 
Pike Whales. 
'I’he dorsal fin in this family is high, erect, com- 
pressed, about two-thirds of the entire length from 
the nose. 'I’he pectoral fin is moderately large, with 
four short fingers. 'I’he vertebra} number fifty, 'i'he 
cervical vertebra; are sometimes anchylosed. 'I’he 
neural canal is broad and trigonal. Ribs are 11, 11. 
'I’he second cervical vertebra with a broad lateral 
expansion, perforated at the base. 'I’he first rib is 
single-headed, 'i’he lower jaw has a conical coronoid 
process. 
Bal.e.xoptera. — Gray. 
In this, the typical genus (formerly Fabricia of< 
Cray), the lower lateral processes of the third to the 
seventh cervical vertebra with an angular projec- 
tion on the lower edges. The fingers are short, the 
length of the fore-arm bone. 'I’he scapula is broad, 
with an acromion process and coracoid elongate and 
slender. 
THE BEAKED PIKE WHALE {Balamoptera ros- 
trata, (rray).— Habitat, North Sea. Balaenoptera 
velifera. Cope. Has a large dorsal fin. Inhabits 
Oregon and California Coast and Queen Charlotte’s 
Sound. 
SwiNHOiA. — Gray. 
'I’he lower lateral processes of the third to the 
sixth cervical vertebra are slender and regularly 
curved, without any prominent angle on the lower 
edge, 'i’his is an East Indian or Chinese genus, 
having one species, as follows: 
THE CHINESE PIKE WHALE [Swinhoia chinen- 
sis, Gray). — Inhabits the seas of Formosa. 
Yol. I. — r . 
Section H.— DENTICE'I’E. 
'I’oothed Whales, literally, are included in this 
section, as distinguished from the preceding, the 
Mysticete, or those having only the whalebone ap- 
pendage in lieu of teeth. In this section the teeth 
are well developed in one or both jaws, but are in 
some cases deciduous. 'I’he head is large, or moder- 
ately so, and compressed. 'There are two tympanic 
bones, dissimilar and separate, becoming united, and 
sunk in a cavity in the base of the skull. The gullet 
is large. 
Prof. Gray arranges the sub-orders in tliis section 
which have certain relations to each other, in two 
parallel series. 'The first division has the nostrils 
longitudinal, parallel or diverging, and each covered 
with a valve; in this division is the following sub- 
order : 
Sub-Order— PHYSE'I’EROlDEA.— fi'ray. 
" 'The head in this group is blunt ; the nostrils long- 
itudinal, parallel or diverging, and each covered with 
a valve ; the right one is often obliterated. 'There 
are many teeth in the lower jaw, fitting into holes in 
the gums of the upper one. 'There is no distinct 
lachrymal bone. 'The costal cartilages are not ossi- 
fied. 'The hinder ribs lose their tubercular and re- 
taining their capitular articulation with the vertebrae. 
'The greater number of the cervical vertebrae are an- 
chylosed together. 'The pterygoid are thick, pro- 
duced backwards, meeting in the middle line, and not 
involuted to form the outer wall of the post-palatine 
air-sinus. 'The symphysis of the mandible is either 
of moderate or excessive length. 'There are no func- 
tional teeth in the uppei' jaw. 'The teeth of the man- 
dible are various, often much reduced in number. 
The lachrymal bones usually large and prominent. 
Bones of the skull are raised, so as to form an 
elevated prominence or crest behind the anterior 
nares. 'I’he orbit is small, or moderate in size. 'The 
pectoral limbs are small. 'The dorsal fin is u.sually 
[irese n t . ’ ’ — Flower. 
Family— CA'TODON'TID’^. 
'The head is compressed, truncated in front and veiy 
large. 'The blowing-lioles are separate, linear in shape, 
and situated in front of the head, on the upper part. 
'I’he mouth is beneath, and linear in shape. 'The pec- 
toral fin is short, broad and truncated. 'I’he dorsal 
lump is rounded. 'The skull elongate, crown concave, 
and surrounded by a high perpendicular wall, formed 
by the doubled-up maxilla and occipital bones. 'The 
upper jaw is toothless. 'I’he atlas is free, and the 
rest of the cervical vertebrae united by their bodies 
and spines into a consolidated mass. 
Catodon. 
'The atlas vertebra of this genus is transverse, and 
nearly twice as broad as high ; the central canal sub- 
trigonal and narrow below. 'The skull is nearly one- 
third the entire length of the body. 
