KEPTILIA OF KIRTLAND FORMATIOK GILMOEE 181 



The gular scutes are greatly reduced in size and are widely sepa- 

 rated by a pair of large intergulars, which meet on the median line 

 for a distance of 100 mm. In the presence of greatly reduced gulars 

 this species resembles B. variolosa. The humeropectoral sulcus is 

 at first directed backward from the axillary notch for 45 mm, then 

 turns abruptly forward and inward to the median line. The 

 humeral scutes at the center measure 23 mm in length. The pec- 

 toral scutes are narrow at their outer ends, as in B. variolosa. At 

 the narrowest part they measure 43 mm, at the center 208 mm. The 

 abdominal scutes are large, measuring 143 mm along the mid line; 

 the femorals 100 mm, and the anals 117 mm. 



The scutes covering the bridge are separated from the plastral 

 scutes by a nearly straight sulcus running from the axillary to the 

 inguinal notch. As pointed out by Hay (1911) only the most 

 anterior and most posterior are inframarginals, the intervening ones 

 being marginals. The absence of inframarginals constitutes one of 

 the important distinctive features of the genus Basileiiiys. 



In size and form of the carapace and in the proportions of the 

 dermal scutes, this species has its nearest resemblances in B. vari- 

 olosa. The chief distinction lies in the form and development of 

 the epiplastral beak. It differs in being broad and protruding, in- 

 stead of roundly pointed and nonprotrudent, as in B. variolosa. 

 From B. sinuosa and B. yraeclara it is distinguished by the greatly 

 reduced gulars that are not in contact on the median line. 



A specimen recently described by Wiman (1933, pp. 25-30) from 

 the Fruitland shales of New Mexico is likewise referred to this 

 species. The form of the anterior lobe has the shape of B. variolosa 

 Cope, which differs considerably from the lobe of the Kirtland speci- 

 mens previously described. If these two specimens pertain to the 

 same species, the difference observed may be sexual, in which event 

 the National Museum specimen is probably the male, the Upsala 

 specimen the female. 



ADOCUS BOSSI Gilmore 



Four additional specimens pertaining to Adoeias hossi were ob- 

 tained by the 1929 expedition. These (U.S.N.M. nos. 12838, 12842, 

 12982, and 12983) are nearly complete shells and except for being 

 flattened are in a good state of preservation. All were found close 

 together in SWi^, T. 24 N., R. 13 W., San Juan County, N. Mex. 

 A fifth specimen (U.S.N.M. no. 11326), which appears to be refer- 

 able to this species, was collected by C. H. Sternberg in 1923 on 

 Meyers Creek, San Juan County, N. Mex., from the Fruitland 

 formation. 



