Miscellaneous. 455 



discovery, which is in itself an interesting fact, and will, no donht, 

 lead to an acquaintance with many new forms of these elegant little 

 Molluscoids, as it has already added a new area heyond the hitherto 

 known limit of their geographical distribution. 



I remain, Gentlemen, 



Your obedient Servant, 

 Geological Survey Office, Melbourne, C. D'Oyly H. Aplin. 



Sept. 24, 1860. 



HELIX MOUHOTI. 



To the Editors of the Annals of Natural History. 



Gentlemen, — At p. 203 of the present volume of your Journal you 

 did me the favour to insert the descriptions of two new land-shells 

 from Cambojia. For one of them {Helix Mouhoti) I beg permission 

 to alter the name to Helix Cambojiensis, the name Mouhoti having 

 heen assigned already by Dr. Pfeiffer to another species of Helix. 



I am, Gentlemen, Yours, &c, 



Nov. 5, 1860. Lovell Reeve. 



CORBULA ROSEA. 



To the Editors of the Annals of Natural History. 



Gentlemen, — By inserting the enclosed in your * Annals,' you 

 will much oblige y our 0De dient Servant, 



Ben. ¥m. Adams. 



1860. July 30th and August 2nd. When dredging in Dalkey 

 Sound, I discovered, off the south-west of the island, on a gravelly 

 bottom, forty-one live specimens of Corbula rosea. I have carefully 

 compared them with Forbes and Hanley's description, and also 

 shown thern to Dr. Farran of Feltrim, so that no doubt exists as to 

 their identity ; and all doubt as to their being a British species is 

 now removed. 



The Rectory, Cloghrar, 

 Nov. 1, 1860. 



On the Morphology of the Compound Eyes in the Arthropoda. 

 By E. Claparede. 



In order to complete the important investigations already made 

 upon the histology of the compound eyes of insects, the author has 

 undertaken the study of the evolution of these organs. In those 

 insects with a complete metamorphosis which possess compound 

 eyes, it is well known that the larvae are either blind or furnished 

 only with simple eyes. It is therefore in the pupae that the genesis 

 of the compound eyes must be studied. 



The author soon found that the investigation of the eyes during 

 their formation threw an unexpected light upon their histological 

 composition. In fact, at first a multitude of elements are distinct 



