122 



SEVENTH REPORT. 



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2 



C'ROTAI.LS MOHRll>L■^ LlNN.KUS. 



Fig. 2. A venomous snake. 



1. Nostril. 2. Loreal pit. 3. Vertical pupil, 

 caudal. 7. Keeled scales. 9. Smooth scales. 10. 

 between the supraoculars. 



4. A ventral scale. 5. Anal plate. 6 Sub- 

 Rostral. 8. A distinct head with small scales 



Glossary. 



Keel. A little ridge on the median line of a scale. 

 Labials, inferior. The first row of scales on the lower lip. 

 Labials, superior. The first row of scales on the upper lip. 



Labials 8-10, and similar notation, means that there may be 8 to 10 plates or scales of the class named. 

 Laminiform. Anything thin or plate like. 

 Loreal. The plate between the postnasal and preocular. 

 Loreal pit. A small pit between the eye and nostril of venomous snakes. 

 Lorealocular. An abnormal loreal which takes the place of a true loreal and a preocular. 

 Maxillary. The upper jaw or pertaining to the upper jaw. 

 Muzzle. The front end of the head of an animal, the snout. 

 Nasals. The plates in contact with the nostrils. 

 Occipitals. The large plates on the back part of the head. 



Oculars, 1-2 or 2-2, means one preocular and two postoculars or two preoculars and two postoculars 

 Ovoviviparous. Animals that are oviparous but hatch the egg within the body. 

 Parenthesis, figures within, as (3) or (2,5), means that they occur rarely. 

 Peropodes. Animals with imperfect or abortive feet. 

 Postocular. One of the small .scales bounding the orbit posteriorly. 

 Prefrontal. One of the plates immediately in front of the frontal.' 

 Prehensal. Having an organ adayjted to seize or grasp. 

 Preocular . One of the small scales bounding the orbit in front. 

 Rostral plate. The vertical plate on the end of the nose. 



Sonoran region. Southern New Mexico, Arizona. Nevada and Northern Mexico. 

 Suboculars. The small scales below the eye or orbit and above the labials. 

 Supraoculars. The large plates above tlie ej'es. 

 Suture. The seam where two scales or plates unite or meet. 



Temporals. The scales between the occipitals and superior labials posterior to the postoculars. 

 Temporals 1, 2, 3, means that there is one temporal in the first row, two in the second and three 

 in the third. 



Urosteges. The plates on the under surface of the tail. 



Ventral. Belonging to the belly or abdomen. 



Ventrals. The scales or plates on the abdomen. 



Vertebral. Pertaining to the back-bone or region of the back-bone. 



Names of .Authorities and their .'Abbreviations. 



Allen,— A. 

 Baird,— B. 

 Beauvais, — Beau. 

 Bibron, — Bib. 

 Blainville,- — Blain. 

 Blumenback, — Blum. 

 Bocourt, — Boc. 



Boice, — Boice. 

 Bonapart , — Bon 

 Boulenger, — Boul. 

 Brown, A. — Br. 

 Catsby,— Cat. 

 Cooper, — C. 

 Cope, — Cope. 



Cones, — Cones. 

 Cuvier, — Cuv. 

 Daudin, — Dau. 

 DeKay,— DeK. 

 Duges, — Dug. 

 Dunierile, Dum. 

 Fitzinger, — Fitz. 



