PROCEEDINGS, IX 



Mr. F. A. Lucas read a paper entitled Notes ox the Verte- 



BR.E OF AmpHIUMA, SiREN, AND MenOPOMA.* 



Mr. F. \V. True g^ave 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, iS86. 



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 39, 1S86. 



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

 Mr. J. B. Smith read a paper on Ants' Nests and Their 

 Inhabitants. II 



Dr. T. H. Bean presented a communication on The Trout 



* 1886. Lucas, F. A. The Sacrum of Me7iopoma. <Amer. Nat., xx, 

 pp. 561, 562, June. 



t 18S7. Proc. U. S. Nat. Mus.. x, pp. 8, 9. 



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

 structures on the placent8e of the mouse, rat, and field-mouse. American 

 Naturalist, August, 1S87, pp. 770-784 (with two figs.) 



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

 tylus), Proc. Acad. Nat. Sci., 1S87, p. . 



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



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



