NO. 5 CAMBRIAN TRILOBITES 393 



ASAPHISCUS ? cf. FLORUS, new species 



Plate 63, fig. 7 



This form is represented by a broken cranidium. It is closely 

 related to Asaphisctts f Hants, except that the frontal limb is larger 

 and the palpebral lobes a little longer in proportion to the length of 

 the cranidium. 



Formation and locality. — Upper Cambrian ?: (loye) Kittatinny ? 

 limestone; i mile (1.6 km.) southwest of Ore Hill and 4 miles (6.4 

 km.) south of Roaring Spring, Bedford County, Pennsylvania. , 



BLAINIA, new subgenus 



Blainia differs from Asaphiscus in the compact form of its convex 

 dorsal shield and in its general appearance when compared directly 

 with the dorsal shield of Asaphiscus zuheeleri, the type of the genus. 

 The pleural thoracic furrows are narrower than in the genotype, 

 A. (Blainia) gregarius; the pygidium has a narrower outline and 

 the pleural furrows extend down to the outer margin which gives 

 quite a different aspect as compared with the broad, smooth border 

 on the pygidium of ^. zvlieeleri. 



The species referred to Blainia have nine thoracic segments and six 

 to II distinct anchylosed segments in the pygidium. 



Genotype. — Asaphiscus (Blainia) gregarius Walcott. 



As far as known, the subgenus is confined to one horizon of the 

 Middle Cambrian Conasauga shales in Cherokee County, Alabama. 

 Asaphiscus (Blainia) gregarius is a very abundant form on the 

 siliceous nodules embedded in the shale and A. (B.) paiila and A. 

 (B.) elongatus are relatively rare. 



ASAPHISCUS (BLAINIA) ELONGATUS, new species 



Plate 63, figs. 4, 40, 5, 5a 



This is a large species represented by cranidia, and a pygidium 

 that may or may not belong with the cranidium. The cranidium 

 appears to be congeneric with that of the other species referred to 

 Asaphiscus (Blainia), but it differs specifically in the elongate out- 

 line of the glabella, also of the pygidium, if the one referred to the 

 species really belongs with it. 



The form of the glabella and palpebral lobe is much like that of 

 A. (B.) paula, but the frontal border curves backward at the center 

 in front of the glabella. The associated pygidium is elongate and 

 formed of about 12 anchylosed segments. From its size and form 



