MAMMALIA. 
37 
Vermis iarandus. A Society has commenced a very promising attempt at 
introducing the Reindeer in the Upper Engadin. Zool. Gart. 1867, pp. 114-119. 
4 IlyomoscJms aqtiaticus. Mr. Flower has examined the visceral anatomy, 
directing attention to a peculiar structure of the larynx (consisting especially 
in the extraordinary development of the thyroid cartilage), and to the pre- 
sence of a rudimentary psalterium. Proc. Zool. Soc. 1867, pp. 954-960. 
CETACEA. 
4 Mr. Flower lias, on the occasion of his researches into the os- 
teology and systematic position of Inia and Fontoporia^ exposed 
his views on the division of the animals of this order. Trans. 
Zool. Soc. vi. 1867, pp. 109-115. After having recapitulated 
the principal distinctive characters of the two suborders Mysta- 
coceti and Odontoceti, he directs attention, for the further sub- 
division of the latter, especially to the ossified or cartilaginous 
condition of the sterno-costal elements, a peculiar mode of 
attachment of the ribs to the vertebr?e being constantly found 
associated with the sterno-costal bones. The following arrange- 
ment of the Odontoceti is proposed : — 
Fam. 1. PiiYSETERiDiE. Costal cartilages not ossified. The hinder rihs 
losing their tubercular and retaining their capitular articulation with the 
vertebrae. The greater number of the cervical vertebrae ankylosed together. 
Pterygoid bones thick, produced backwards, meeting in the middle line, and 
not involuted to form the outer wall of the postpalatine air-sinus. Sym- 
physis of mandible of moderate or excessive length. No functional teeth 
in upper jaw. Mandibular teeth various, often much reduced in number. 
Lachrymal bones usually large and distinct. Bones of the skull raised so as 
to form an elevated prominence or crest behind the anterior nares. Orbit of 
small or moderate size. Pectoral limbs small. Dorsal fin usually present. 
Subfam. 1. Physeterinm with Physeter and Kogia. - 
Subfam. 2. ZiphiincB with Hyperoodon, Perardius^ Ziphius, DioplodoUj 
and Micropteron. 
Fam. 2. pLAXANiSTiDiE. Costal cartilages not ossified. The tubercular 
find capitular articulations of the ribs blending together posteriorly. Cer- 
vical vertebrro all free. Pterygoid bones thin, not conforming in their mode 
of arrangement with either of the other sections. Jaws very long and 
narrow ; both with numerous teeth having compressed fangs. Symphysis 
of mandible very long, exceeding half the length of the entire ramus. Orbit 
very small. Lachrymal bones not distinct from the jugal. Pectoral limbs 
large. Dorsal fin rudimentary.’ 
Subfam. 1. Platanisthm. Maxillary bones supporting large bony incurved 
crests. No cingulum or tubercle at the base of the crown of the teeth. 
Pectoral fins truncated. Visual organs rudimentary. External respiratory 
aperture longitudinal, linear. Platanista. , 
Subfam. 2. Iniince. Maxillary crests absent, or very slightly developed. 
Many of the teeth with a complete cingulum, or a distinct tubercle at the 
base of the crown. Pectoral fin ovate, obtusely pointed. Inia (and Ponto- 
poria ?). 
Fam. 3. Delphinidas. Costal cartilages firmly ossified. Posterior ribs 
