ONISCUS PRiEGUSTATOR. 79 



follows (fee Salvii editio, Holmi^ ^7^3- ?• 1060. alfo 

 Trattner's Vienna edition, fame page). 

 '■'■ Infed. apt. Oniscus, Pedes XIV. 

 Antenna fetaceae 

 Corpus ovale. 



O. Phyfodes, abdomine fubtus nude, cauda ovata. 



Habitat in pelago ; corpus prajter caput, et caudam 

 ultimam, ex feptem legmentis trunci, et quinque caudsj. 

 Antennje utrinque duo, breves. Caudae folium termi- 

 nale omnino ovacum ; ad latera utrinque fubtus auclum. 

 duobus petiolis diphyllis, foliolis lanceolatis, obtufis, Cau- 

 da brevioribus. Caudse articuli fubtus obte£ti numerofis 

 veilculis longitudine caudse." 



From the particularity with which the onifcus phyfodes 

 is defcribed by Linnaeus, it is evident that he had the 

 infedl before him, or a defcription by an attentive ob- 

 ferver. it appears alfo from the " Habitat in ■pe/ago^'' 

 that the O. phyfodes, if this be the inled, is found de- 

 tached from his condudtor. There are a few points in 

 which the O. phyfodes diirers from my infed:. i did not 

 obferve the antennae, perhaps for want of fufEcient atten- 

 tion, or of a microfcope. The petioli of the tail were 

 not, to appearance, two-leaved^ and 1 am certain that the 

 fegments of the tail, and the tail itfelf, were without the 

 'ueficuh longitudine caudce: 



There are many circumftances, to afcertain which is ef- 

 fential to the natural hiflory of this infecl. The fiih 

 whofe mouth he inhabits comes, about the fame time 

 with the chad, into the rivei's of Virginia from the ocean, 

 and continues to travel upwards from the beginning of 

 March, to the middle of May; as long as they are caught 

 upon their paflage up the river, they are found fat and 

 full of roe. Every lifii which 1 faw had the onifcus in 

 his mouth; and I was allured, not only by the more ig- 

 norant fifhermen, but by a very intelligent man who 



came 



