64 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8o 



distance in front of it. The stride is about 115 mm., width of track- 

 way about 125 mm. Hindfoot: Length about 30 mm., width about 

 33 mm. There are five digits. Toes widely spread as in Hylopus. 

 Fifth toe strongly set off from the other. Second and third toes sub- 

 equal in length, others progressively shorter toward the outside of 

 the foot. Sole rather lightly impressed. Considerable variation in the 

 length of toes is noted in the several impressions available ; the length 

 of toes as given below are measurements taken from the two most 

 clearly impressed tracks. Length of toes : I = 9 mm. ; II = 11 mm. ; 

 III = 10.5 mm.; IV = 10 mm.; \^ = 9 mm. Forefoot: Length 

 about 28 mm., width about 20 mm. There are three long slender toes, 

 the outer slightly spreading from the inner two. Toes subequal in 

 length, none less than 18 mm. long. Sole indistinctly impressed. 



The digital formula of five in the pes and three in the manus at 

 once distinguishes this trackway from all others found in the Hermit 

 fauna, but in the Joggins, Nova Scotia, fauna two genera, Aspcripes 

 and Cursipcs, are found with a similar number of digits. The elon- 

 gated nature of the toes, especially in the manus, and the relatively 

 small soles seems to show that its affinities lie in the genus Cursipcs 

 to which it is provisionally referred. 



The much larger size of the tracks, and differences noted in the 

 plan of the feet, especially in the relatively shorter and stouter toes 

 of the pes, are characters that might serve to distinguish it from the 

 described species, C. ciazvsoni and C. Icvis Matthew, but on account 

 of the unsatisfactory nature of the evidence to be obtained from this 

 single specimen its designation as a distinct species is deferred for 

 the present. It is sufficient at this time to call attention to the ]iresence 

 of Cursipcs in this fauna in the expectation that better specimens may 

 be found, which will permit its adequate characterization. 



INCERTE SEDIS 



Plate 17, fig. 2; plate 18 



Under this heading, attention is called to certain ichnites occurring 

 in the Hermit formation that are apparently new to the fauna, but 

 due to the paucity of information to be obtained from specimens in 

 hand it seems undesirable to name them. 



Specimen No. 11,528, U. S. N. M. (see pi. 18). is notable as being 

 the largest footprint yet discovered in the Hermit formation, and as 

 such it appears worthy of this brief description. 



This specimen was found by Mr. G. E. Sturdevant and was pre- 

 sented by him to the national collections. It was picked up on the 



