130 Scientific Intelligence. 
6.) The nostrils, as in all Vertebrates, consist at first of pits or inden- 
tations in the integuments; secondly, a lobe is developed on the inner 
border of each; and, finally, the two lobes become connected, and thus 
form the homologue of the fronto-nasal protuberance. The transitional 
stages of these correspond with the adult conditions of them in ot 
species of Selachians. 
(7.) The nasal grooves are compared with the nasal passages of air- 
breathing animals, and the cartilages on either side of these to the max- 
illary and intermaxillary bones. 
he foremost part of the head is formed by the extension of the 
facial disk forward; while this extension is going on, the cerebral lobes 
change their position from beneath the optic lobes to one in front of them. 
(9.) Two anal fins, one quite large and the other very small, are de- 
compares the results with what is already known of the development of 
our common star-fish, in order to trace out the agreement of the mode of 
formation of the young in these four subdivisions of Echinoderms. Mr. 
open star. He says, respecting Miiller’s observations, that it is 
natural that his i we have in the development of Echi 
a rom the bilateral to the radiated form, “should have made 
lateral symmetry. And it not been for the clear idea we now have 
of the character of the parts of radiated animals, (see L. Agassiz, Contrib. 
Nat. Hist. U.S., iii, iv,) I doubt not that Miiller’s view would have 
gained general acceptance among investigators; and the whole frame- 
work of classification, based upon the idea that a plan pervades the dif- 
ferent types of the animal kingdom, would have fallen to the ground, if 
it could have been clearly proven that in Echinoderms we had a trans 
tion from one of these plans to another.” 
11. On Dimorphism in the Hymenopterous genus Cynips, with an 
linois; by Bens. D. Watsa, 58 
Proceedings of the En logical Society of Philadelphia, March, 
pp. 443-500.)—The Cynips studied by Mr. Walsh 
eies of Oak, the Quer galls produce males 
. Parte ’ 
females of the Cynips spongifica in June. Another portion of them, 
| ’ similar general character, remain green till a 
Lae gy eG 3 + i ee Oe 
erik stoned ' Ss ‘ +. ; 
oo 
