384 EEV. A. M. N0EMAN" AND ME. G. S. BEADY 



the "Natural History of the British Entomostraca' n are pre- 

 served, and as it is now many years since our friend has had 

 any of these species passed through his hands, he naturally hesi- 

 tates to express a very decided opinion, although he has little 

 or no hesitation about them. It is worthy of especial remark, 

 that in all the cases of doubt, there is nothing in the descrip- 

 tions by Dr. Baird which is at variance with the forms which 

 we regard as his species ; in each instance the difference con- 

 sists in the mode of sculpture of the carapace as represented in 

 the figures, and it should be borne in mind that the drawings 

 were not all executed by Dr. Baird, but by an artist, who, not 

 having studied the animals, was perhaps not sufficiently careful 

 in the delineation of certain minute details, of the importance 

 of which he was not aware. 



10. Lzncetjs exiguus, Lilljeborg. PI. XVIII, fig. 3; and 

 PI. XXI, fig. 3. 



1853. Lynceus exiguus, Lilljeborg. De Crust. Clad. Ostra. et 



Copep. in Scania occurrentibus, p. 79. PI. VII, figs. ' 

 9, 10. 



1854. Lynceus excisus, Fischer. Bulletin de Soc. Imp. des. 



Natural, de Moscou, p. 428. PI. Ill, figs. 11-14. 



1860. Lynceus exiguus, Leydig. JSaturges. der Daphniden, p. 

 228. 



1862. Alonella excisa, G. 0. Sars. Om de i Omegnen af Christ. 



forekom. Clad. Andet Bidrag., p. 52. 



1863. Pleuroxus excisus and exiguus, Schoedler. Xeue Beitrage 



zur Xaturges. der Clad., p. 49 and 51. 



Carapace subovate, abruptly truncate posteriorly ; ventral mar- 

 gin gently and dorsal strongly arched, the former ciliated ; infero- 

 posteal angle produced downwards to an acute point, behind 

 which, on the posterior margin, are two or three minute serra- 

 tures ; surface reticulated, reticulations mostly hexagonal. Head 

 semi-erect, hooded, rostrum a little produced, and acute, bending 

 downwards at the extremity ; anterior antenna? not reaching the 



