Mr. G. Newport on the existence uf Bj-anchia in Pteronarcys. 21 



Fam. Orbitulitid^. 

 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 Oi-b. 

 complanata. 



Ord. Carxosa. 

 Fam. Alcyonidiad^. 

 Cor. Crag. Red Crag. Recent. 



1. Alcyonidium circumvestiens, n. s. 



Sutton. j Sutton. | 



Polypid. enveloping univalve shells, surface papilliform and rugose. 



Tliis 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 adliering 

 to the interior of a shell. 



Class LITHOPHYTA. 

 1. Nullipora. 



Sutton. I J 



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

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

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

 Haa^ing been favom'ed by ]Mr. Barnstone with a specimen of 

 that magnificent Neuropterous insect, Pteronarcys regalis, cap- 

 tm'ed by himself m the high latitude of 5-4" on the .\lbany river, 

 North Americat, and preserved in spirit, I have been agreeably 

 sm'prised at finding in the perfect state of this species a series of 

 thoracic branchia, 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 requii'es a close attention to its habits to explain. This is 

 the only genus, so far as 1 am aware, in which the branchial form 

 of the respu-atory organs, so common in the larva and pupa of the 



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



t It was brought by Mr. Barnstone with a large collection of Canadian 

 insects which he had recently captured, and has since jsresented to the Bri- 

 tish Museum. 



