HEEFETOLOGY OF PORTO KICO. 



Diinoisionii. 

 The largest specimen in onr iimsemii (No. 2i>,'574) measures as follows: 



621 



mm. 

 260 

 95 



Total length (tail ri'produced) - - 



Snout to vent 



Tail (reprodueeil) - 165 



Snout to ear 23 



Width of head - - 16 



Fore leg from axilla 32 



Hind leg from groin - 62 



Outer toe without claw - - 8. 5 



Inner toe without claw 4. 5 



The specimen described ])y Boulenger measured from snout to vent 

 122 mm., and was consequently a much hirger animal. It seems 

 doubtful, however, if ^i. dhoguttata reaches the same extreme size 

 as A. exiil. 



Ilahitat. — This form, as far as known, is restricted to the small 

 island of Mona. 



List of specimens af Amclra ulboynttata. 



Genus CELESTUS" Gray. 



1838. Cdeslus Gray, Ann. Nat. Hist., II, Dec, 1838, p. 288 



(type C. striatus). 

 1845. Oneijda Gray, Cat. Liz. Brit. Mus., p. 119 (type (>. 



oivenii). 



1860. iSlderolmiipnis Cope, Proc. Phila. Acad., 1860, p. 368 



(type S. enneagrammm) . 



1861. Panolopux Cope, Proc. Phila. Acad., 1861, p. 494 (type 



P. costal us). 



In spite of the great external resemblance to the 

 skinks as exemplihed by the Mabuya, descrilied above, 

 the lizards forming this genus belong to a totally dif- 

 ferent family, the Anguidx^ of which our "glass 

 snake" is perhaps the best known example. They are 

 with equal propriety called ''slippery backs," being- 

 smooth and gloss}^, and this name might appropriately 



« According to Agassiz Celestus is a name of some person. It is quite as likely, 

 however, that it is a nonsense word coined by Gray. 



Fig. 73.— Shields 

 on top of head 

 OF Celestus. /, 

 frontal ;/h, fron- 

 tonasal; ip, in- 

 terparietal; oc, 

 occipital: ji, pa- 

 rietal: }if. pre- 

 frontal: )■, ros- 

 tral; sn, supra- 

 nasal; ,sv>, supra- 

 oculars. 



