192 PROCEEDINGS OF THE ACADEMY OP 



* 



series of brownish black spots. These alternate ; the inferior involves the 

 tips of the gastrosteges ; the median embraces the largest spots, eight and 

 nine scales wide, which are occasionally subdivided, the halves alternating. 

 The tail is brown, crossed by three pairs of dark brown bars. Lips pale, 

 with a spot below the pit, and one from behind the eye to near the canthus 

 of the mouth. A dark band convex forwards extends between the eyes, and 

 is continued below the eye nearly to the labial border. A pair of blackish 

 bands form a V-shaped figure, the limbs diverging over the temples, each 

 followed by a spot : two small round spots in the angle of the V, and a 

 broad divergent band from the occiput on each side of the nape. Below pale, 

 each scute with a broad basal border of blackish spots and punctulations. 



Length of rictus of mouth, 11 lines ; breadth between eyes 5 lines*; length 

 of tail, 15J lines; of rattle, 13 lines; total, 23 inches, 9 lines. 



Habitat. Table Land, Mexico. 



In the related C. triseriata, there are twenty-three rows of scales, a 

 broader front, and different coloration. 



Laemanctus alticoronatus. 



Posterior outline of cephalic casque nearly vertical ; its lateral borders 

 ascending from the parietal plane, and furnished with six corneous processes 

 or horn-like scales on each side (each once or twice constricted). Two scales 

 on canthus rostralis ; two between them and labials, and two between nasal 

 and orbit. Nine upper labials, ten lower, infralabials broad as long, nearly 

 smooth. Four between second labials. Scales all keeled, fifty-one in a ring 

 round the body, dorsals a little larger than laterals, scarcely smaller than 

 ventrals. A few elevated vertebral scales on nape and interscapular region, 

 the latter equal dorsal scales ; no further crest. Four pairs of supranasal 

 plates, posterior largest, lateral parietal much larger than median. Forelimb 

 extends from wrist to nostril ; posterior limb heel to neck fold. General 

 color chestnut, with five deep brown dorsal cross-bars (last sacral) and a nar- 

 row yellow band from loreal region to groin, bounded above, from orbit to 

 tympanum, by black and chestnut. Muzzle and front above, with lower sur- 

 faces "emerald to pale malachite" (Schott), limbs scarcely banded, darker ; 

 lumbar and inguinal regions yellow. 



End of muzzle to end of casque, 14.2 lines ; anterior limb, 22.8 lines ; 

 axilla, 18.8 lines ; throat to top of casque, 9.2 lines ; vent, 3 inches, 4.5 lines; 

 vent to end of tail, 11 inches, 8 lines ; vent to end of hind limb, 3 inches, 

 4.5 lines. 



Habitat. Yucatan, near Merida. Collected by Arthur Schott, naturalist 

 of the Comision Cientifica de Yucatan, under authority of D. Jose Salazar 

 Starregui, Governor of that country. 



Called Yaxtoloo Maya, Coll. No. 308. Nearly allied to L. s e r r a t u s. 

 Cope, Pr. A. N. S., 1864, p. 176. 



Sphaerodactylus g 1 a u c u s. 



Dorsal scales very small, but flat, rounded, smooth ; about ninety series 

 round the body ; abdominals larger, rounded, about forty-four rows from 

 vent to axilla, continued larger on under side of tail (not reproduced in this 

 specimen). Labials 4 , three scales bordering mental. Supraorbital mucro 



present, orbit equal from its border to, or little beyond, nostril ; muzzle and 

 front gradually acuminate. Auricular meatus smaller than digital pallette. 

 Above light brown, "greenish stone color or glaucus " in life, with minute 

 paler spots and dark vermiculations ; below whitish. Tail in life orange, 

 more intense toward tip; in spirits with two yellow black-edged spots near 

 tip, and one on each side the origin. Limbs and digits annulated with yel- 

 low, black bordered. 



Muzzle to axilla, 5.5 lines ; Muzzle to vent, 11.6 lines ; vent to end of tail, 

 10.4 lines. 



[Oct 



