3->6 APPENDIX. 



sent the appearance of a St. Andrew's cross, 

 each half of the animal containing precisely the 

 same organs; namely, an alimentary canal, a 

 system for circulation and generation, and also a 

 nervous system. Muller calls the innumerable 

 and varying cohorts of the animal creation 

 preachers of the infinite wisdom and power of the 

 Sovereign of the world ;* and this is one of the 

 most wonderful of them all, which singularly 

 exemplifies those attributes. 



At first it might be imagined, that, like the 

 youths just alluded to, this was a monstrous pro- 

 duction of nature ; but Dr. Nordmann relates 

 that he has found thirty specimens, precisely 

 agreeing with each other, all in a similar situa- 

 tion, attached namely, to the gills of the fish 

 mentioned above, and he never found it single, 

 or in any other situation : there can, therefore, re- 

 main no doubt on the subject. In order to find 

 these animals, it is necessary to examine all the 

 leaves of the gills separately under water, or to 

 separate the lesser whitish ones with a pointed 

 instrument, when the animal may be detected by 

 its movements : its station is between the leaves 

 or folds of the inner gills. 



This singular creature consists of two lobes, or 

 arms, above the point of union, and two below it. 

 The upper pair are the longest and most diver- 



J Entomostraca. 27. 



