48 Mamm. 
MAMMALIA. 
■frontals and parietals ; and Eabalcena , Halibalcena , Balcemtla , and 
Balcenotus are identified with Palceocetus . The paper concludes with 
a synopsis of all the North American fossil species. 
Gerstacker, A. Das Skelet der Doglings ( Hyperoodon rostratus ) ; ein 
Beitrag zur Osteologie der Cetaceen, und zur vergleichenden 
Anatomie der Wirbelsaule. Leipsic : 1887, 4to, 175 pp., 2 pis. 
[Omitted from Zool. Bee. xxiv.] 
Kukenthal, W. Cetologische Notiz. Anat. Anz. v, pp. 709 & 710. 
Figures the manus of an embryo of Balcenoptera, in which there are 
rudiments of a digit occupying the position of the third of the typical 
pentadactylous manus ; thus indicating^ that it is this digit (and 
not, as generally considered, the pollex) which has disappeared in this 
and the allied genera. 
. Ueber die Hand deT Cetaceen (dritte Mitteilung). Op. cit. ii, 
pp. 44-52, woodcuts. 
Describes and figures the structure of the carpus and phalanges in 
several species. 
. Ueber Reste eines Hautpanzers bei Zahnwalen. Op. cit. v, 
pp. 237-240. 
Records tubercles in the skin of Neomeris and Phoccena spinipinnis , 
which are considered to be remnants of a dermal armour possessed by the 
terrestrial ancestors of the Cetacea. 
Pouchet, G., C.R. Soc. Biol. (9) ii, pp. 686-688, has notes on the 
record of two Whales stranded in the 7th and 9th centuries. 
Retterer, E. Sur quelques States de Involution du Gland des Cdtac6s. 
C.R. Soc. Biol. (9) ii, pp. 653 & 654. 
Southwell, T. Notes on the Seal and Whale Fishery of 1889. Zool. 
(3) xvi, pp. 81-85. 
Thompson, D’Arcy W. On the Cetacean Larynx. Stud. Mus. 
Dundee, i, art. xi, pp. 1-8, woodcuts. 
It is shown that the so-called arytenoid cartilage of the Odontoceti was 
originally duplex, one part being the true arytenoid, and the other termed 
the supra-arytenoid. It is considered probable that a similar condition 
obtains in the My&tacoceti. 
a. Bal^nidtE. 
Sacco, F. Sopra una Mandibola di Balcenoptera dell* Astigiana. Atti 
Acc. Tor. xxv, pp. 612-618, pi. i rbis. 
Describes and figures part of the mandible of a species of Balsenop- 
teroid from the Pliocene of Astigiana, under the name of Balcenoptera 
( Plesiocctus ) cortesi, n. var. portisi. 
Balcena biscayensis : G. Pouchet, C.R. Soc. Biol. (9) ii, pp. 705-708, 
