606 ADDENDA AND COERIOENDA, 



^jj(j . Page 368. Yar. tessellatus. 



c-d. Ilgr. & yg. Arizona or New Mexico. Dr. W. G. Wright [P.]. 



^^^ . Page 373. Cnemidophorus ocellifer. 



i. (S . Paraguay. 



^^^ . Page 380. Teius teyou. 



r-s. Eggs. Kio Grande do Sul. Dr. v. Dieriug [C.]. 



^j^ . Page 389. Arthrosaura reticulata. 



Leposoma picticeps, Cojie, Proc. Am. Phil. Soc. xxiii. 1885 (86), p. 99. 



Judging from the description, I must regard Cope's species as 

 based on an adult male of A. reticulata. 



Page 390. Add a genus : — 



16 a. MIONYX. 



Mionyx, Cope, Proc. Am. Phil. Soc, xxiii. 1885 (86), p. 96. 



" First toe of both anterior and posterior extremities with rudi- 

 mental straight claw ; claws of other digits small, straight, and 

 conic. Pra^frontal and frontoparietal plates present and distinct 

 from each other. Ear-drum exposed. No distinct collar. Femoral 

 pores present. Pholidosis squamous, nearly homogeneous." 



1. Mionyx parietalis. 



Mionyx parietalis, Co^je, /. c. 



Scales imbricate and keeled, with acute posterior borders above 

 and below ; when the epidermis is lost, the inferior scales are nearly 

 truncate. Dorsal and ventral scales subequal, forming 21 trans- 

 verse series between the anterior and posterior limbs, across the 

 back; behind the auricular meatus, and in the axilla, they are 

 coarsely granular. Limbs with large keeled scales. A transparent 

 disk on the lower eyelid, which is covered by two scales. Head- 

 shields smooth ; a loreal plate, higher than long, projects at an angle 

 between two prjeoculars, the upper of which is large and extends 

 partly over the eye, leaving only three narrow supraciliaries ; four 

 supraoculars; frontonasal large, about as wide as long; pra^frontals 

 forming a median suture ; frontal and frontoparietals considerably 

 longer than wide ; interparietal large, as wide as long ; parietals 

 much smaller, longer than wide ; no occipitals ; temporals small, 

 squamous. Seven upper labials, separated from the orbit by a row 

 of narrow suborbital scales ; five lower labials ; an undivided post- 

 symphysial and fou/ pairs of chiia-shields ; no distinct pectoral scales. 

 Limbs slender ; the hind limb reacht;s a little beyond the elbow. 

 Digits weak and slender, first rudimcntal. Femoral pores 10 on 



