482 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



Pcedciiniias transitans — Continued. page 



development of cephalon of 237 



thorax in 245 



geographic distribution of 253 



hypostoma 243 



compared with those of Olenellus fremonti and Olenellus gil- 



berti 322 



mentioned 233, 234, 242, 248, 266, 302, 303 



path of facial suture in 242 



stages passed through in development of 308 



stratigraphic distribution tabulated 251 



surface of compared with that of Parad oxides 307 



young cephalon from Alabama described 308, 309 



young compared with those of Wanneria halli 297 



young stages of dorsal shield . 307 



Paget formation, correlated 171 



defined 3 



section of 205, pi. 9 



Paget and Bosworth formation, Mount Bosworth, break between 215 



PalcBobolus, see Obolus (Palccobolus). 



Pallial sinuses, defined 160 



palUseri, see Ptychoparia. 



Palpebral segment defined 238 



panderi, see Acrothele. 



pannula, see Micromitra (IpJiidella). 



pannula maladensis, see Micromitra (Iphidella). 



pannula ophirensis, see Micromitra {Iphidella) . 



Parabolina, compared with Albertella 19 



Paradoxidae, trilobites belonging to the family described. 18-22 



Paradoxides, anterior pair of furrows in 333 



compared with Burlingia 14, 15 



development of, shown in diagram 249 



elongation of second segment in 245 



followed by Olenellus [Whitfield] 313 



from St. Albans, Vermont, figured text figs. 10 and 11, p. 255 



mentioned 89, 104, 247, 255 



preceded by Olenellus 313 



surface of, compared to that of Pa-druniias 307 



zone, fossils in 78, 104 



asaphoides Barrande, in synonymy 269 



Emmons, in synonymy 269, Z2>^ 



brachycephalus Emmons, in synonymy 269, 336 



harlani, compared with Holniia broggeri (Shimer) 254-255, 



text figs. 12 and 13, p. 255 



mentioned 254 



hicksi, mentioned 276 



kjeruia Ford, in synonymy 288 



Linnarsson, in synonymy 288 



Walcott, in synonymy 288 



