30 Mamm. 
MAMMALIA. 
Tuckerman, F. Observations on the Gustatory Organs of the Bat 
( Veapertilio subulatus). J. Morph, ii, pp. 1-G, pi. i. 
This paper describes and figures in detail the taste-organs in the tongue 
of this Bat. 
Van Ben EDEN, E. De la Fixation du Blastocyste it la Muqueuao 
Uterine chez le Murin (Vespertilio murinus). Bull. Ac. Belg. (3) xv, 
pp. 17-27. 
The long list of conclusions at which the author arrives are summed up 
on p. 26 of his memoir. The plate, of which an explanation is given on 
p. 27, has never been issued (see p. 263 of same volume). 
. De la Formation et de la Constitution du Placenta chez le Murin 
(V. murmas). T. c. pp. 351-364. 
As in the preceding memoir, the author’s conclusions as to the placen- 
tation of this Bat are summed up under several headings. 
Vesperugo stampjlii , n. sp., F. A. Jentink, Notes Leyd. Mus. x, p. 54, 
Liberia. 
Vespertilio mystacinus : notes and figures of British examples of this 
species given by J. E. Harting, Zool. (3) xii, pp. 161-166 & 441, pis. ii 
& iii. Recorded by T. A. Coward, t. c. p. 223, from Cheshire. 
Vespertilio ciliolabrum , n. sp., C. H. Merriam, P. Biol. Soc. Washing- 
ton, iv, pp. 1-4, W. United States. 
Nyctophilu8 microtia , n. sp., O. Thomas, Ann. N. H. (6) ii, p. 226, New 
Guiuea. 
5. RODENTIA. 
Bi EII RINGER, — . Ueber die Umkehruug der Keimbliitter bei der 
Scheermaus (Arvicola amphibius , Desm.). Arch. Anat. Phys. 1888, 
Anat. Abth. pp. 279-286, pi. xvii. 
An account of the mode of inversion of the foetal-membranes in 
Arvicola. 
Cope, E. D. The Mechanical Causes of the Origin of the Teeth of the 
Rodentia. Am. Nat. xxii, pp. 3-13, 9 woodcuts. 
The Rodents are considered to be derived from Tillodonts (Ta3uiodonts), 
allied to Psittacotherium of the Puerco Eocene, and consequently that 
their incisors correspond to the second of the typical series. It is then 
argued that the large size of the incisors has originally caused a backward 
thrust in the mandible, which has resulted in the disappearance of the 
postglenoid process, and the capability of a fore-and-aft motion. This 
has been accompanied by changes in the insertion of muscles, and the 
gradual development of the present type of skull and dentition. Figures 
are given of skulls of Rodentia , Tillodontia , and Multituberculata. 
Giacomini, C. Sur le Canal Neurenterique et sur le Canal Anal dans 
les Vesicules Blastodermiques du Lapin. Arch. Biol. Ital. x, pp. 273- 
294, pi. 
Observations on the histology of these canals in the Rabbit. 
