MEXICAN SNAKES AND CROCODILIANS — SMITH 431 



spectively, of these are: ?, 164 ?; 9, 165, 34; S, 152, 38; S, 150, 

 37. A distinct difference is indicated between the sexes in these 

 counts. Supralabials 6-6 in all ; infralabials 7-7 except in one, which 

 has 6-7 ; third and fourth labials entering orbit in all ; mental sepa- 

 rated from chin shields ; posterior pair of chin shields slightly smaller 

 than anterior in one, three-quarters as large in another, two-thirds in 

 one, and one-half in the other. Belly checkered, the light area about 

 equal in extent to the black area, or somewhat greater. 



These specimens were found under stones on grassy hillsides, at 

 the summit of the ridge in the Sierra Madre Oriental. 



The Museum has no others of the species. 



*GEOPHIS CANCELLATUS Smith 



Two specimens 37 are in the Museum, including the type (No. 46440) 

 from Chicharras, Chiapas, and one paratype (No. 46441), probably 

 from the same locality. 



*GEOPHIS CHALYBEUS (Waglcr) 



Three specimens, cotypes of Rhabdosoma guttulatum Cope, are in 

 the Museum, from Mirador, Veracruz (Nos. 25024-5, 30399). 38 



GEOPHIS MUTITORQUES (Cope) 



Geophis mutitorques Smith, Proc. New England Zool. Club, vol. 18, pp. 53-55, 

 1941. 



Six specimens were collected, all at Pan de Olla, Veracruz (near 

 Teziutlan, Puebla) (Nos. 109940-4, HMS 13074). These have been 

 discussed elsewhere. 



Three specimens from near Zacatlan, Puebla ( Amer. Mus. Nat. Hist. 

 Nos. 14218, 15251, 19773) add somewhat to the knowledge of the range 

 of variation in the species. All are males, with 161, 158, 157 ventrals, 

 respectively ; 41, 34, 40 caudals ; 6-6, 5-6, 6-6 supralabials ; 7-7 infra- 

 labials; 0-0 preoculars; 1-1 postoculars; 1-2 temporals; posterior 

 chin shields in contact. 



The Museum has no others of the species. 



*GEOPHIS NASALIS (Cope) 



Two specimens (Nos. 46611, 46613) in the Museum are from Chi- 

 charras, Chiapas. 39 



37 Smith, 1941a, pp. 1-2. 



38 Cope, 1885b, p. 3S5 ; Smith, 1941a, pp. 3, 6. 



39 Smith, 1941a, pp. 4-5. 



