490 ZOOLOGY. 



hairy woodpecker on the cocoon of the hirge cecropia moth ; in opposi- 

 tion to the belief that the cocoons offer protection against other natural 

 destructive agencies, such as mice and birds, it is remarked that " there 

 is at least one bird, the hairy woodpecker {Piciis villosiis Linn.), from 

 whose attack the staunch cocoon of the cecropia offers no protection 

 whatever." Indeed, although, so far as Mr. Webster was able to ob- 

 serve, birds do not attack these cocoons at all until winter ; they then 

 seem to make it a regular source of subsistence, and where the wood- 

 pecker abounds the cocoons are rarely left uninjured. We need only 

 remark, in this connection, that while the observations of Mr. Webster 

 may be quite correct, his inference is scarely justifiable, at least to the 

 extent he would seem to push it. What dangers the cocoon may escape 

 because of its envelopment are unknown, but, doubtless, more than offset 

 those noticed by Mr. Webster. 



MAMMALS. 



GENERAL. 



Allen (Harrison). On the Temporal and Masseter Muscles of Mammals. Proc. Acad. 

 Nat. So. Phila, 1880, pp. 385-396. 



Balfour (F. M. ). On the Evolution of the Placenta, and on the possihility of employ- 

 ing the characters of the Placenta in the Classitication of the Mammalia. Proc. 

 Zool. Soc. Loudon, 1881, pp. 210-212. 



Cope (E. D.). On the Effect of Impacts and Strains on the Feet of Mammalia. Am. 

 Nat.,v. 15, pp. 542-548. 



Ficatier (Jac. Frc. Adr.). Etude anatomique des glandes sudoripares. Auxerre, 

 Gallot, 1881. (4to, 85 p., 3 pi.) 



Focillon (A.) Esquisses des Animaux Mammif feres les plus remarquables. Tours, 

 1831. (8vo, 212p.) 



HenselCKeinhold). Craniologische Studien. Mit8Taf. Nova Acta Ac. Caes. Leop. 

 Carol., V. 42, pp. 127-195. 



Huxley (Thomas Henry). On the application of the Laws of Evolution to the ar- 

 rangement of the Vertehrata, and more particularly of the Mammalia. Proc. 

 Zool. Soc. London, 1880, pp. 649-6G2. 



Lucae (Joh. Chstn. Gst.). Zur Statik und Mcchauilfder Quadrupeden (Felis und Le- 

 mur). Frankfurt a. M., 1881. (4to., 24 p., 2 Taf ) 



Martin (H. Newell). A new method of studying the Mammalian Heart. Studies 

 Biolog. Laborat. Johns Hopk. Univ., v. 2, p. 119-130, 1 pi. 



Meyer (E.) Spermatogenese bei den Saugethieren. MtSm. Acad. Imp. Sc. St. Pdterbg., 

 (7,) t. 27, no. 14. (15 pp., 2 pi.— M. 1 30.) 



Paladiuo (Giov.). Delia caducita del parenchima ovarico e del rinnovameuto totale 

 della stesso mercfe ripetizione del processo di primordiale produzione. Con. 2 tav. 

 Napoli, Detken, 1881. (8vo., 73 pp.) 



Talma (S.). Beitrag zur Histogenese der weiblichen Brustdriise. Arch. f. mikroskop. 

 Anat., v. 20, pp. 145-159. 



Fossil mammals. 



Grewingk (Const.), tjbersichtderbisberbekannten Reste altquartiirer und ausgestor- 

 beuerneuquartiirer Saugethieri Liv, Est— und Kurlauds. Sitzungsber. Naturforsch. 

 Ges. Dorpat, v. 5, pp. 332-336. 



R^rolle (Lonis). Etude sur les Mammiferes fossiles des dep6ts pampeens do la Plata, 

 d'apres les collections du mvisde de Buenos Ayres, present 6e a 1' Academic des Sci- 

 ences, etc., de Lyon le 20 Juill. 1880. Mem. Acad. Scienc, etc., de Lyon, v. 24. 

 Classe d. Sc. 



