\8 
ZOOLOGICAL LITERATURE. 
but may be retained as a generic group, on account of tlie pecu- 
liar form of this vertebra. Further, Physalus latirostris of 
Flower proves to be identical with Ph. sibbaldii of Gray, and is 
regarded as the type of a distinct genus, Cuvierius. The arrange- 
ment of the Denticete is the following : — 
Fam. 1. Oatodontidje : a. Catodoiitina, with Catodon and Megancuron 
(see Zool. Rec. 1865, p. 49). b. Physetet'imj with Physeter, Kogia, and ii'w- 
physetes. 
Fam. 2. Platanistidje. 
Fam. 3. Iniidje. 
Fam. 4. DELPiriNiniE. 
a. Delphinina : Pontoporia ; Stem with 16 spec. ; Delphinus with 24 
spec., two of which are now, viz. D. stenorhyncJnts (p. 896), D. major (p. 896), 
habitat unknown j 2'ursio witli 22 spec., of which T. dorcides (p. 400) is new, 
habitat unknown ; Sotalia, g. n. (p. 401), type Delphinus guianensis (Van 
Bened.) ; Lagenorhynchiis with 12 spec. ; Pelpliinapterus with 2 spec. 
b. : Orca with 4 spec. ; Pseudorca with 2 spec. ; Grampus with 6 
spec. — Phoccma with two or three spec, j Neomeris {plioccenoides'). — Beluga j 
Monodon, 
Fam. 6. Globiocephalid.® : Glohiocephalus with 8 spec.; SpJicerocephalus 
{incrassatus'). 
Fam. 6. ZiPiiiiDiE : see Zool. Record, ii. p. 47. 
Dr. Gray has reexamined the skulls of Pelphininay and proposes 
the following improved arrangement of the genera and species, 
the characters being taken solely from the skull (Proc. Zool. 
Soc. 1866, May, pp. 211-216) : — 
I. Beak of the skull elongate, compressed. Nasal triangle short. Sym- 
physis of the lower jaw elongate. 
1. Pontoporia. 
2. Steno: u (^St. frontatus et cotnpressus') . /3. Sousa (^St. capensis ei lenti- 
ginosus). y. Tucuxa {St. tuctai). 8. Stenella {St. attenuatiis^. 
II. Beak of the skull elongate, depressed, broad, shelving on the sides. 
Nasal triangle short. Symphysis of the lower jaw short, sloping. 
* Palate with a deep groove on each side behind. 
8. Delphinus : ot {D. longirostris). /3 (D. delphisy mooriiy major y 
loalkeriyjanira). 
* * Palate flat behind, witliout any lateral grooves. 
4. Clymene'. a {Cl. stenorhyncha). /3. Euphrosyne (6Y. ?mcroj!?s, «Zo/)e, 
euphrosyne). y. Clymene {Cl. 7ior77ialis = D. cly7nene, doi'isy doridesy obscura). 
6. Delphinapto'us. 
6. Tuj'sio ( T. metisy cymodocey t7'uncatus, eui'ipiome, catakmia ; these skulls 
are all so much alike that they may be only varieties). 
7. Butropia {Bit. dickiei^ Tursio eutropiay Bu. heavisidii). 
III. Beak of the skull broad, flat above, edges slightly reflexed and bent 
up in front of the notch. Nasal tilangle elongate. Symphysis of the lower 
jaw short. 
8. Lage7iorhy7ichus : a. Electra {L. eleetruy asuiy et acutus) {L. cla7iculus 
et thicoled). /3. Leucopleurus {L. leucopleurus). y. Lagenorhynchus {L. 
alhirostris) . 
