42 SAINT DIEGO SOCIETY OF NATURAL HISTORY 



Herrick (C L.) Observations upon th(^ so-called Waverly Group of 

 Ohio. 



Geol. Ohio, vol. 7, 1893, pp. 495-515, plates 14-J4, Cliapter IV. 



Proetus praecursor Herrick. Phaetlton'uies sp'inosus Herrick. Phillipsia meramecensis 

 Shumard. Proetus minutus Herrick. PliiUipsia serraticaudata Herrick. Phaethonides 

 immiiturus Herrick, P. occidentalis Herrick. Proetus sp. ?, P. auriculatus Hail. 



This chapter is a summary of the results of observations published in the Bulletins 

 of Denison University, the American Geologist, and the Bulletins of the American 

 Geological Society. 



The plates are from the Bull. Denison University. 



Hind (O. A.) and Fox (II.) On Radiolarian rocks in the Lower 

 Culm. 



Quart. Jour. Cieol. Soc, vol. 5!, p. 609. 



Trilobites by Dr. Henry Woodward, pp. 646-649. 



Phillipsia Leei \\'^oodw., P. minor W'oodw. Phillipsia larval form. 



Griff ithidcs a( a/ithiccps V/oodw., C lo/ti^ispi/ius Portl. Proftus species A-B. 



Hitchcock (C. H.) Notice of a new si)ecies of Acidas])is from a 

 boulder of ^lareellus shale found in drift at West Bloonitield, New 

 Jersey. 



Bull. Am. Mus. Nat. Hist., vol. 19, 1903, pp. 97-98, plate 6. 



The author describes Aeidaspis Jl'hitfieldi n. sp., which he compares with Acidaspis 

 inira Barr., but the new species is rather more complicated in the distribution of the 

 spines. 



Hochsteetter (F.) Silursuiten (12 Gypsabgussen seltener Trilobiten^i. 



Verb. d. k. k. Geol. Reichsanst, Wien Jhg., 1877, p. 74. 



Hoek (P. P. C.) Neues Jahrl) fiir Min. (ieol. and Pal., 1912. 

 Hoenes (R.) Die Trilobiten ({attuny Pliacops und Dalinanites. 



Jahrb. k. k. Cieol. Reicli., 1880, vol. 30, part 4, pp. 657-686. 



Ordovician: Dalmanites Angeinii Barr., D. atavits Barr., D. Deshayesi Barr., D. 

 Hawlei Barr., D. Morrisiana Barr., D. orha Barr., I). Phillipsi Barr., D. socialis Barr. 

 and var. proaeva Emm., also var. grandis. 



Silurian: Dalmanites auriculata Dalm., D. eristata Corda, D. Flctcheri Barr., D. 

 Hausmanni Brongii., D. McCoyi Barr., D. Reussi Barr., D. spinifera Barr. Phacops 

 rugosa Corda, P. spinifera Barr., P. Glockeri Barr., P. Boecki Corda, P. breviceps Barr., 

 P. Bronni Barr., P. htilliceps Barr., P. eeplialotes Corda, /'. emarginatus Barr., P. \ecun- 

 dus Barr., P. Iloeninghausi Barr., P. intermedins Barr., P. miser Barr., P. Signatus 

 Corda, P. Sternburgi Corda, P. trapezieeps Barr., P. I'olberthi Barr. 



The author discusses: 



1. Characteristic of the genera Phacops and Dalmanites : similar and dissimilar 

 features. 



2. The group of Dalmanites socialis and tlieir relationsiiip lo those of tlie Dalman- 

 ites Hausmanni ; also to the genus Phacops. 



3. The group of Phacops Glockeri as coiniecting link between Phacops and Dal- 

 manites. 



4. The probable evolution between the genera Phacops and Dalmanites. 



