66 
NOTICES OF MEMO IE S- 
iri the corium, is left behind in the shin, lymph flows conti- 
nually from the wound, and a purulent condition soon set- 
ting in converts the originally small woimd into a more or 
less extensive sore.” 
The author then discusses the question as to whether 
there are two species of Nigua or only one, and decides in 
favor of the latter opinion. He next gives a very complete 
account of the anatomy of tho animal, which is illustrated 
by two well-executed plates. He concludes with some re- 
marks on the propriety of tho separation of Rhjnchopr ion a& 
a distinct genus from Pul ex. 
B. J, L. <£. 
