157 



two specimens of Exocetus or Flying fish of the Northern 

 Atlantic ; one Cuttle fish, and the head of a Coryphaena, 

 from the North Atlantic. 



Dr. Cabot announced that fourteen birds had been 

 added to the collection since the last meeting, received in 

 exchange. 



Mr. Charles Siedhof, of Newton Centre, was elected a 

 member of the Society. 



June 6, 1849. 

 The President in the Chair. 



Present, seventeen members. 



Mr. Ayres presented two specimens of a new species of 

 Leuciscus, from Fairfield County, Connecticut, much resem- 

 bling L. pulchellus, with which it has been hitherto con- 

 founded, for which he proposed the name L, pulchelloidcs, 



Leuciscus pulchelloidcs differs from L. pulche.Uus in the 

 smaller size of its scales, which are sixty in number on the lat- 

 eral line, instead of forty-seven or forty-eight ; in the height of 

 the anal fin, which is twice its length instead of a little less than 

 equal ; in the more pointed form of the pectorals and their length, 

 which is one fifth of their height instead of two fifths ; in the 

 position of the ventrals, which are a little more in advance ; and 

 their length, which is one fourth of their height instead of two 

 fifths. The right lobe of the liver is higher, and the gall-bladder 

 more globular. P. 19 instead of 17. V. 10 instead of 8. 



The President, in allusion to the skulls presented by him 

 at the last meeting, repeated a tradition of the Delaware 

 Indians : that their ancestors came from the north-west, 

 and after crossing the Mississippi, became engaged in wars 

 with the Ohio, or Mound Indians, which ended in the 

 expulsion of the latter from their homes, and their disap- 



