CROCODILIANS, LIZARDS, AND SNAKES. 677 



ANNIELLA TEXANA Boulenger. 

 Anniella iexana Boulenger, Annals andM.igaz. Nat. Hist., Lond., XX, 1887, p. 50. 

 The following description is copied from Bonlenger: 



Head less depressed, snout more rounded . au in A. pulclir a. Nasal shield semi- 

 divided, a horizontal suture extending from the nostril to the second labial; frontal 

 twice as hroad as long; anterior supraocular nearly as broad as the distance which 

 separates it from its fellow; interparietal and occipital divided (anomalously?) by 

 a longitudinal suture; six upper labials — iirst very small, below the nasal, second 

 largest and in contact with the prefrontal and a loreal, third and fourth entering 

 the eye; a narrow shield separates the third labial from the loreal; five lower labi- 

 als. Twenty-eight scales round the middle of the body. No enlarged preanal scales. 

 Tail ending obtusely, three-eighths of the total length. Dark gray above with three 

 fine black longitudinal lines; sides and lower surfaces whitish. 



From snout to vent, 145 mm. ; tail, 85 mm. 



A single specimen from El Paso, Texas. 



ANNULATI. 



AunuJatt Wiegmann, Herpt. Mex., 1834, p. 4. 



Amplmhania Gray, Cat. Tort. Croc, and Amphisbsenians Brit. Mus., 1844, p. 68. 

 OpkeoHauri Cope, Proc. Acad. Nat. Sci. Phila., 1864, p. 226; Bull. U. S. Nat. Mus., 

 No. 32, 1887, p. 25. 



Parietal bones laterally decurved, and continuously united with 

 petrosal by suture, and fused on the middle line, frontals inclosing 

 olfactory lobes of the brain below. No cranial arches, vertebr* pro- 

 co'lous; the cervicals with coossifled hyjiapophyses on the middles of 

 the centra. Chevrons coossilied with the middle of the centra, the 

 anterior without symphysis. 



The visceral characters are as follows: 



One lung, apparently the left, which lies ventrad of the alimentary 

 canal. Liver situated mucli posterior to the heart, very elongate, dis- 

 tally bilobate, the right lobe much longer than the left. Gall bladder 

 situated in the notch between the lobes of the liver. Stomach not 

 turned to the left; small intestine elongate, terminating in a large 

 intestine which is imperfectly distinguished into colon and rectum. 

 Kidneys i^osterior, symmetrical; a urinary bladder. Corpora adiposa 

 jjresent, free. Ventral mesentery extending from heart to distal 

 extremity of liver, hence elongate; dorsal mesentery following the pli- 

 cations of the intestine and not binding them into a simple mesenteric 

 pouch, as is seen in the Serpentes. 



Subordinate modifications are observable in different types. Thus, 

 in AmpMsbama alba and A. fuUginosa there is a short ciecum, and 

 the corpus adiposum is subdivided. In Rhinenra Jioridana there is no 

 caicuni, and each corpus adiposum is undivided. 



This superfamily embraces the most snake-like of the Sauria. This 

 aftinity is seen in most parts of their osseous structure, in the inclosure 

 of the brain case by the frontal and parietal bones in connectiou with 

 the petrosal, the absence of sui)ratemporal, the numerous coossilied 



