PROCEEDINGS. IX 



Mr. F. A. Lucas read a paper entitled NOTES ON THE VERTE 

 BRA OF AMPHIUMA, SIREN, AND MENOPOMA.* 



Mr. F. W. True gave an account of SOME DISTINCTIVE CRA 

 NIAL CHARACTERS OF THE CANADIAN LYNX,! with exhibition 

 of specimens, and also exhibited a specimen of a wood hare, 

 showing an abnormal growth of fur. 



NINETY-FIFTH MEETING, May i, 1 886. 



The President in the chair, and twenty-six persons present. 



Prof. R. E. C. Stearns read a paper entitled INSTANCES OF 

 THE EFFECT OF MUSICAL SOUNDS ON ANIMALS. 



Mr. John A. Ryder spoke upon THE EVOLUTION OF THE 

 MAMMALIAN PLACENTA,! which, he contended, had passed in its 

 evolution from a diffuse, through a zonary, to a discoidal condi 

 tion. 



Mr. W. H. Dall exhibited specimens of LINGULA (GLOTTIDIA) 

 PYRAMIDATA, Stimpson, attached to sand and bits of shell by 

 the tip of the peduncle. He also described THE SUPERFICIAL 

 ANATOMY OF DIFFERENT SPECIES OF THE GENUS PECTEN. 



NINETY-SIXTH MEETING, May 29, 1886. 



The President in the chair, and twenty-two persons present. 

 Mr. J. B. Smith read a paper on ANTS' NESTS AND THEIR 

 INHABITANTS. || 



Dr. T. H. Bean presented a communication on THE TROUT 



* 1886. LUCAS, F. A. The Sacrum of Menopoma. <Amer. Nat., xx, 

 pp. 561, 562, June. 



1 1887. Pr c- U. S. Nat. Mus., x, pp. 8, 9. 



+ A Theory of the Origin of Placental Types, and on certain vestigiary 

 structures on the placentae of the mouse, rat, and field-mouse. American 

 Naturalist, August, 1887, pp. 770-784 (with two figs.) 



See also (the placentation of the two-toed ant-eater, Cycloturus didac- 

 tylus), Proc. Acad. Nat. Sci., 1887, p. . 



1886. Bull. Mus. Comp. Zool., xii, No. 6. 



|| 1886. Amer. Nat., xx, pp. 679-687, August. 



