DAPHNIAD.^. 67 



gives all Miiller's species, merely quoting his descriptions 

 and copying his figures. 



Fabricius, in his ' Entomologia Systematica,' 1793, 

 changes Miiller's names in one or two instances, but does 

 not extend the number of species ; but Schrank, in the 

 * Naturforscher' for that year, describes a new one. 



Donovan, in his ' Natural History of British Insects,' 

 1802, gives an indifferent figure of a species taken when 

 in its young state, and which appears to be the Baphiia 

 vetula. He calls it Monoculm conchaceus, and makes a 

 few remarks upon its habits and manners, giving a 

 frightful picture of its ferocity and cowardice ! "By nu- 

 merous filaments which it darts forth," he says, " it 

 causes such a motion in the water as to attract unresist- 

 ingly the insects floating into its mouth. Thus it 

 exists," he concludes, " a life of rapine and destruction, 

 enjoyed at the expense of the lives of thousands ; and as 

 the objects of its ravenous disposition are defenceless, so 

 are they the sport of their conqueror ; the few moments 

 of intermission its craving appetite grants them, is occu- 

 pied equally in the spoil, first pressing them to death, and 

 then tossing them undevoured into the fluid. But should 

 a more powerful insect oppose him, he immediately con- 

 tracts his parts, and nothing more than the external 

 covering is open to his antagonist's violence, and he will 

 sooner die ignobly than offer the least opposition." 



Latreille, in his ' Hist. Nat. gen. et part, des Crustaces 

 et Insectes,' 1802, enumerates all Miiller's species, re- 

 taining his names ; and they are given in the same manner 

 by Bosc, in his ' Hist. Nat. des Crust, edit, de BufFon, 

 par Deterville,' 1802, both authors giving a number of 

 general details with regard to the family. 



Ramdohr, in 1805, published a detailed account of 

 the anatomy of two species, the sima {vetulci) and longi- 

 spina of Midler, in his ' Beyt. zur Naturg. einig. dents. 

 Monoculus-arten.' Previous to his time, Schceffer, De 

 Geer, and Midler, were the only authors who had 

 attempted any particular anatomical details, and this 



