LIST OF PLATES. 



Plate I. 



Fig. 1. PJirynonax eutropis, Blgr., p. 22. 

 2. Coluber janseni, Blkr., p. 57. 



Upper and side views of head aud neek. 



PtiTE II. 



Spilotes merjcilolepis, Gthr., p. 24. 

 Upper, lower, and side views of head and neck. 



Plate III. 



Fig. 1. Coluber frenatus, Gray, p. 58. 



2. LeptopJiis occidentalis, Gthr., p. 111. 



3. nigromarginatus, Gthr., p. 112. 



Upper view of head and anterior part of body, and 

 side view of head. 



Plate IV. 



Fig. 1. Dendrophis hifrenalis, Blgr., p. 80. Upper view of head 

 and neck. 

 1 a. ■ . Side view of head. 



1 b. . Side view of middle of body. 



2. grandoculis, Blgr., p. 84. Upper view of head 



and neck. 



2 a. . Side view of head. 



