Mr. G. Newport on the existence of Branchim in Pteronarcys. 21 



Fam. ORBITULITIDiE. 



1. Orbitulites coscinodiscus, n. s. 



Sutton. I I 



Polypid. discoidal, smooth, flat ; cells concentric, linear, and radi- 

 ating in straight lines. 



The cells differ in form and arrangement from those of Orb, 

 complanata. 



Ord. Carnosa. 

 Fam. Alcyonidiad^. 

 Cor. Crag. Red Crag. Recent. 



1. Alcyonidium circumvestiens, n. s. 



Sutton. I Sutton. | 



Polypid. enveloping univalve shells, surface papilliform and rugose. 



This covering attains a thickness of more than half an inch, 



and can be partially removed in layers ; in some instances the 



univalve is entirely absorbed. Not restricted to one species of shell. 



Class AMORPHOZOA. 

 1. Grantia compressa, Johnston {Brit. Sponges, p. 174. pi. 20. f. 1). 



I Walton Naze. | Britain. 



Three very minute specimens, found by Dr. Johnston adhering 

 to the interior of a shell. 



Class LITHOPHYTA. 

 1. NuUipora. 



Sutton. I I 



IV. — On the existence of Branchice in the perfect state of a Neu- 

 ropterous Insect, Pteronarcys regalis, Newm., and other species 

 of the same genus. By George Newport, Pres. Ent. Soc. &c.* 

 Having been favoured by Mr. Barnstone with a specimen of 

 that magnificent Neuropterous insect, Pteronarcys regalis, cap- 

 tured by himself in the high latitude of 54° on the Albany river. 

 North America t, and preserved in spirit, I have been agreeably 

 surprised at finding in the perfect state of this species a series of 

 thoracic branchice, a condition of the external respiratory organs 

 that is usually met with only in the preparatory larva and pupa 

 states of insects. The persistence of external branchiae in a winged 

 insect, fitted in every other way for flight in the open atmosphere, 

 like other species of the order to which it belongs, is an anomaly 

 that requires a close attention to its habits to explain. This is 

 the only genus, so far as I am aware, in which the branchial form 

 of the respiratory organs, so common in the larva and pupa of the 



* Read at the meeting of the Entomological Society, December 4, 1843. 



f It was brought by Mr. Barnstone with a large coilectiou of Canadian 

 insects which he had recently captured, and has since i)resented to the Bri- 

 tish Museum. ' 



