492 PROCEEDINGS OP THE ACADEMY OF 



plate pentangular, much broader than high, presenting an angle posteriorly ; 

 scales upon the muzzle and in front of the orbits, nearly equal, small ; head 

 covered with small granulations ; five rows of very small circular tubercles 

 on each side of the back above ; a row of seven pores in front of the anus ; 

 color greyish, marked all over with black ; abdomen white ; chin and throat 

 white, marked with brown. 



Dimensions. Length of head 7 lines ; greatest breadth 4| lines ; length of 

 head and body 1 inch 8 lines. 



Habitat. Loo-Choo. One specimen. 



Hemidacttlus inornatus nob. 



Spec. char. Mental plate triangular, large ; but two plates immediately 

 behind the mental, large and quadrangular ; immediately behind them two 

 others, smaller, and also more or less quadrangular ; rostral plate broader 

 than high, not presenting an acute angle posteriorly ; the plates behind it 

 rather small, with one intermediate, eleven supra-labials, the last six the 

 smallest ; but two rows of circular tubercles on either side of the median line ; 

 no tubercles upon the head ; scales small, and for the most part equal ; color 

 uniform drab above, with a few dark colored maculations ; under parts white. 



Dimensions. Length of head six lines ; greatest breadth four lines ; length of 

 body 1 inch 3 lines ; of tail 



Habitat. Loo-Choo. One specimen. Caught in a shed, Nov. 1854, (W. S.) 



Gen. remarks. This species is readily distinguished from the preceding 

 by the different shape and size of the mental plate, and arrangement of the 

 scales posterior to it, and the presence of pores in front of the anus. 



SciNCID-ffi. 



Plestiodon D. & B. 

 Plestiodon marginatus nob. 



Spec. char. Rostral plate comparatively high; internasal presenting 

 an obtuse and rounded angle posteriorly ; fronto-nasal not in contact, being 

 separated by a considerable interval ; frontal plate heptagonal, more or less 

 truncate anteriorly ; seven superior labials ; olive colored above, with a tinge 

 of red upon the head, and a broad, brickdust colored stripe, commencing upon 

 the temples, and extending along the sides of the neck, and the body, as far 

 the root of the tail ; under parts silvery white. Twenty-five rows of scales ; 

 five in front of the tail. 



Dimensions. Length of head 11^ lines ; greatest breadth 8 lines ; length of 

 body 2 inches 8 lines ; of tail 2 inches 9 lines ; of anterior extremities 11 lines ; 

 of posterior 15 lines. 



Habitat. Ousima, Japan, and Loo-Choo Islands. 



Gen. remarks. The specimen from Loo-Choo is much smaller, and evidently 

 the young of the same species. The lateral stripe of brown is bordered with 

 obscure white, and there is a vitta of the same color running along the middle 

 of the back. This species, with the exception of the lateral band bears a 

 striking resemblance to Plestiodon laticeps of the Southern U. S., but the 

 red upon the head is not near so deep, and the shape of the rostral and 

 frontal plates is quite different, and the fronto-nasals are closely in contact. 

 The smaller specimen, caught April, 1855. by Mr. Stimpson. The larger, 

 May, of the same year. 



OPHIDIA. 



Crotalians. 



BOTHROPS FLAVOVIRIDIS nob. 



Description. The head is large, triangular in shape, covered above and below 

 with smooth ecales, in this respect differing from typical Bothrops, in which 



[Oct. 



