384 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Asaphiscus ? florus Walcott, Upper Cambrian ?, Pennsylvania (pi. 63, fig. 



6). 

 Asaphiscus ? cf. jiorus Walcott; Upper Cambrian ?, Pennsylvania (pi. 61, 



fig. 7). 



ASAPHISCUS CALANUS, new species 



Plate 61, figs. 8, 8a 



This species is most nearly related to Asaphiscus (t) capella. It 

 differs in the form of the frontal limb and glabella of the cranidium. 

 The axial lobe of the associated pygidium is also shorter and the 

 border wider. The specimens are preserved as casts in a fine- 

 grained, arenaceous, shaly rock. 



Formation and locality. — Middle Cambrian : (47h) Arenaceous 

 shales; Wolf Creek, 6 miles (9.6 km.) below Rocky Gap, Bland 

 County, Virginia. 



ASAPHISCUS CALENUS, new species 

 Plate 60, figs. I, la-c 



This species at once recalls A. wheeleri and A. {?) capella. It 

 differs from the former in the form of the frontal limb and border, 

 glabella, termination of thoracic segments, and form of pygidium. 

 From A. {?) capella it is distinguished by its pygidium and minor 

 details of the cephalon. It is more nearly related to A. camma, but 

 differs in the relative width of the frontal limb and border, shorter 

 eye lobes, and in having a less transverse pygidium. 



The largest dorsal shield in the collection has a length of 43 mm. 

 and nine thoracic segments. 



Formation and locality. — Middle Cambrian: (sf) Wolsey shale; 

 in Meagher County on the road to Wolsey, about 4 miles (6.4 km.) 

 south of the divide at the head of Sawmill Creek, and 11 miles 

 (17.7 km.) south of Neihart, Little Belt Mountains quadrangle 

 (U. S. G. S.), and (62J) upper portion of Wolsey shale below 

 Meagher limestone; 2 miles (3.2 km.) east of Logan, on north side 

 of Gallatin River, Gallatin County, Montana. 



ASAPHISCUS CAMMA, new species 

 Plate 60, figs. 2, 2a-c 



This species is characterized by its relatively long eye lobes, broader 

 glabella, and narrower frontal border, when compared with A. {?) 

 capella and A. calenus. Its pygidium is more transverse than that of 



