LIST OF PLATES. 445 



, Plate XV. 



Fig. 1. Tropidonotus sancti-johannis, Blgr., p. 230. Upper, 

 lower, and side views of head and anterior portion 

 of body. a. Upper and lower view of head of young 

 (type specimen). 



2. asperrimus, Blgr., p. 232. Upper and side views 



of head and anterior portion of body. 



Plate XVI. 



Mg. 1. Tropidonotus chrysargoides, Gthr., p. 260. Upper and 

 side views of head and anterior portion of body. 



2. saravacensis, Gthr., p. 261. Upper, lower, and 



side views of head and anterior portion of body. 



Plate XVII. 



Fig. 1. Tropidonotus aurieidatus, Gthr., p. 261. Upper, lower, 

 and side views of head and anterior portion of body. 

 a. Upper view of head, x 2 ; b. Side view of head, 

 X 2. 

 2. Pseudoxenodon dorsalis, Gthr., p. 271. Upper, lower, 

 and side views of head and anterior portion of body. 



Plate XVIII. 



Fig. 1. Lioheterodon modestu^, Gthr., p. 269. Upper and side 

 views of head. 



2. Helicops trivittatm, Gray, p. 276. Upper, lower, and 



side views of head and anterior portion of body. 



3. Opisihotropis andersonii, Blgr., p. 284. Side view of 



head and anterior portion of body. a. Upper view of 

 head, X 3 ; 6. Side view of head, x 3 ; c. Lower view 

 of head, x3. 



