TEIID LIZAEDS OF THE GENUS CNEMIDOPHORUS 213 



Affinities. — 'I'his wliiptail is closely related to eafdlhiensh, to which 

 it is similar in both structure and color pattern. Therefore, it is 

 jDresumed that harafits and catdJinmsis are derived from a common 

 stock. The ]:>attern of these lizards is merely a sli*iht modification 

 of that of maifi/rts;.^ from Avhich this connnon stock may be assumed 

 to have been derived. A further elaboration of this theory is pre- 

 sented in the summary of the tessellatus group (i)p. 221-226). 



CNEMmOPHORUS CATALINENSIS Van Dcnburgh and Slevin 

 SANTA CATALINA ISLAND SPOTTED WHIPTAIL 



1919. CneinidopJiorus disparilis (part) Dickekson, Bull. Amcr. ]Mus. Nat. Hist., 

 vol. 41, p. 473 (Pai-atypes, A.M.N.H. Nos. GSS4-6885). 



1921. Cncmklopliorus catalincnsis Van Denbukgh and Slevin, Proc. Calif. Acad. 

 Sci., ser. 4, vol. 11, p. 396 (type locality, "Santa Catalina Island, Gulf ol' 

 California. Mexico '' ; type specimen, C.A.S. No. 50.j07, .T. li. Slevin, col- 

 lector).— Van DENBrr>GH. Occas. Pap. Calif. Acad. Sci., vol. 10, 1922, p. 042.— 

 Schmidt, Bull. Amer. Mus. Nat. Hist., vol. 4G, 1922, p. 678. — Stf:.tnegeu and 

 Bakbouk, Check List N. A. Amph. and Kept., ed. 2, 102."., p. 70. — Sclatek, 

 Zool. Rec. for 1922, vol. 59, " Reptilia," 1924, p. 23. 



Systematic notes. — Concerning C. dispanlis, Schmidt (1922) wrote 

 as follows: "Two specimens (A.M.N.H. 6884-6885), without other 

 locality than ' Lower California,' referred to C. disparilis by Dicker- 

 son, almost certainly belong to cafalinensis.''' Van Denburgh (1022) 

 expressed the same opinion. At the American Museum of Natural 

 History the writer now finds only one of the above mentioned speci- 

 mens. No. 6885. This was listed as C. d/.^pariJis by Dickerson (11)19) 

 and must, therefore, be regai-ded as a paratype of that species. 

 Since, however, the type of disparilis is a si)ecimen of tcsscVafus, 

 the former name becomes a synonym of the latter. As to the identi- 

 fication of the paratype, No. 6885, the writer fully agrees with 

 Schmidt and Van Denburgh (and feels that there could have been 

 no mistake regarding No. 6884 as well. 



Diagnosis. — The distinctive features of this lizard are all colora- 

 tional. It is distinguished from the very closely related hacatus by 

 a noticeable increase in the number of spots on the back and sides. 

 Moreover, these spots are yellowish, rather than white. In the region 

 above the level of the tympanum and anterior to the insertion of the 

 forearms, spots or indications of spots are absent in hacatus, but 

 present in catalinensis. There are no indications of cross-barring 

 or longitudinal striping in either species, and CA'en reticulations, such 

 as those found in martyris and canus, are absent. Catalinensis is 

 distinguishable from all of the mainland species of spotted Cnemi- 

 dopJiori by its small adult size. 



Description. — Snout rather blunt; nostril anterior to nasal suture; 

 anterior nasal not in contact with second upper labial; supraoculars 



