THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[THIRD SERIES.] 



" •••••• perlitora spargite museum, 



Naiades, et circum vitreos eonsidite fontes : 

 Pollice virgineo teneros Iric carpite flores : 

 Floribus et pictum, diva?, replete canistrum. 

 At vos, o Nymphs Craterides, ite sub undas ; 

 Ite, recurvato variata corallia trunco 

 Veilite muscoiis e rupibus, et mihi conchas 

 Ferte, Deae pelagi, et pingui conchylia succo." 



N.Parthcnii Giannettasii Eel. 1. 



No. 55. JULY 1862. 



I. — Description of some new Species of Entomostracous Crustacea. 

 By W. Baird, M.D., F.L.S. 



[Plate L] 



IN one or two late Numbers of the ( Annals and Magazine of 

 Natural History' (Oct. 1859 and Sept. 1861), I have described 

 several new species of exotic Entomostraca bred in this country 

 from mud brought in a dry state from the neighbourhood of 

 Jerusalem, which was placed in pure water and left to stand a 

 certain time during the warm weather of spring and summer. 

 The number of species amounted to six ; and it was interesting 

 to observe the great number of individuals of two or three of the 

 species amongst these, that successively made their appearance 

 as the warmth of the weather increased. Since then I have had 

 another opportunity afforded me of observing the extraordinary 

 power the ova of these animals possess in resisting the action of 

 long- continued drought. Sulzer and several other authors assert 

 that the adults themselves possess this power also, and maintain 

 the opinion that, after being completely dried up for a length of 

 time, they revive when placed in water. I am not prepared to 

 deny this in toto, especially when they are in their native haunts, 

 deeply immersed in the soft mud ; but the experiments of Straus 

 and Jurine upon individuals exposed to artificial exsiccation go 

 to prove the contrary of Sulzer's statement. That the ova of 

 Ann. §■ Mag. N. Hist. Ser. 3. Vol. x. 1 



