10 LACEETID^. 



Ventrals in rows ; normally a single 



postnasal 8. praticola, p. 25. 



Ventrals in 8 or 10 rows ; a single post- 

 nasal ; anterior border of ear toothed 20. atlantica, p. 42. 



B. Collar-edge even, or very indistinctly serrated ; dorsal scales 

 granular. 



1. Ventrals irr 6 or 8 longitudinal rows. 



a. No granules between the supraoculars and the supra- 

 ciliaries. 



Normally a single postnasal and four 



anterior upper labials 10. pehj^onnesiaca, p. 27. 



h. A series of granules between the supraoculars and the 

 supraciliaries. 



a. Normally a single postnasal. 



Scales on upper surface of crus not larger 



than dorsals 11. mumlis, p. 28. 



Scales on upper surface of crus larger than 



dorsals 12. clepressa, p. 34. 



/3. Normally two superposed postnasals and five or six 

 upper labials anterior to the subocular, 



* Eostral well separated from the nostril. 



Tempoi-al scales uniformly granular .... 13. dugesii, p. 35. 

 Masseteric and sui)ratemporal shields 



distinct 14. oxycephala, p. 3G. 



** Rostral touching or entering the nostril. 



Temporal scales not smaller than dorsals ; 



masseteric shield absent or very small ; 



dorsal scales smooth or nearly so ; ven- 

 trals in 6 or 8 longitudinal series, the 



fourth or outer series on each side, if 



present, much smaller than the others 15. danfordii, p. 37. 

 Temporal scales not smaller than dorsals ; 



masseteric shield small ; dorsal scales 



smooth or nearly so; ventrals in 8 



longitudinal series, the two outer series 



on each side of equal size 16. hrandtii, p. 38. 



Temporal scales not smaller than dorsals ; 



masseteric shield large ; posterior dor- 

 sal scales distinctly keeled ; ventrals 



in 6 longitudinal series 17. Icevis, p. 39. 



Temporal scales smaller than dorsals ; no 



masseteric shield ; dorsal scales smooth ; , 



ventrals in 8 longitudinal series .... 18. jayaJcari, p. 40, 



