MARINE ANIMALS. 



73 



Libellula depressa, 9 -^ -^^- — ^oth sexes are very plentiful on the Downs, 

 frequently resting on the furze-bushes or hawking for prey over the pheep- 

 ponds. I have often found the larva in these ponds. It is a strong, powerful, 

 and pugnacious insect, and extremely tenacious of life. 



Libellula conspurcata, i^aft.— One specimen only, taken on the Downs; I 

 supposed it at the time to have been a variety of L. depressa, but upon 

 close examination it proved to be this species, 



Libellula 4-raaculata, Lin. — Rare: but few examples have come under my 

 notice, and those at distant periods; all have been observed on the Downs. 

 I have been informed by a friend that it is rather abundant in the New 

 Forest. It appears in July. 



Diplax rufostigma. — I have taken this distinct species at Kingston, near 

 Lewes, in September, 1849, and again in 1851. 



Diplax vulgata, Lin. — Very common in the neighbourhood of Lewes, 

 appearing in July and August; it is a very variable insect in size and colouring. 



The above list contains rather above half the known British species, and 

 doubtless more will be added to the catalogue as the district is more diligently 

 searched and their haunts visited. 



St. Ann's, Lewes, February Ibth., 1853. 



MARINE ANIMALS. 



MOLLUSCA.— Part I. 



BY O. S. ROUND, ESQ. 



( Contimted from page Zi.J 



This name was given by Baron Cuvier to a race of marine beings, of which 

 the Barnacles, {Cirrlmpoda ,) and the Cuttle-fish, (Cephalopoda,) are familiar 

 examples. To those animals the Conchifera have been added by modern 

 professors, and this class is represented by the Oysters, Scallops, Cockles, 

 and Mussels. The Barnacles are too well known to need a particular 

 description; they are all marine, and are found in clusters adhering to the 

 bottoms and sides of vessels; — of this the Pentalasmis vitrea is a common 

 example; and it may be mentioned in pasdng as a singular fact that the 

 shell is composed of five pieces, in common with the Echinodermata, or 

 Sea-eggs in popular parlance. The Mollusks are, perhaps, more familiar 

 to us even than the Sea- nettles, although they speak to our taste in a 

 dijfferent manner, and in a somewhat less elegant degree; for, although 

 the sense of tasting may be a real satisfaction to us, and that of seeing 

 merely productive of imaginative images, who can doubt which is superior? 



VOL, III. L 



