98 SAN DIEGO SOCIETY OP NATURAL HISTORY 



RUEDEMANN (Rudolf)— Continued 



American Journal of Geology and Natural Science, pp. 558-560, plate 14, was the 

 original publication in which Dr. Green figures Asaphus micrurus, fig. 3, and Ceraurus 

 plcurcxantliemus, fig. 10. 



At't'ount of some new or little known speeies of fossils, mostly 



from Palivozoic rocks of New York. 



Bull. New York State Mus., No. 189, 1916. 



The author describes the following Crustacea: 



A gnostus Cnshingi nov. 



It differs from A. Ncwtonensis Weller and its congeners in the broad, anteriorly 

 well-rounded convex cranidium and obscure glabella. 



Amphil'ichas conifro;is nov. 



This species differs from A. Trcfitonensis Hall, in. the entirely different outline of 

 the middle lobe of the glabella, wiiich in the former is widest behind and in the new 

 species broadens forward. 



Cerat'tocaris (L'tminocaris) salina nov. 



Spatliiocarls Emcrsoni Clarke. 



These specimens differ markedly from the strange valves figured with S. Emcrsoni 

 on plate 34, fig. 13, Pal. N. Y., vol. 7, which latter possesses a much broadened flat 

 posterior fold and a ver}' shallow anterior notch. The author makes a new species 

 of this form, referring it to Plioladocaris Lutlteri. 



Spathiocaris lata nov., S. chargrinensis nov., S. Cnshingi nov., S. Jl'illiamsi nov. 

 This is of larger size than the congenors and is readily distinguished by its broad form 

 and coarse lines. 



On p. 98 the author gives a discussion on the genera Spathiocaris and the Discino- 

 carina and certain organic bodies called Cardiocaris, Pholadocars, etc., bv \\'^oodward 

 and Clarke, considered as Crustaceans b}' other authors (Roemer, DeVerneuil, Kayser 

 and Dames) as aptychi of Goniatites. 



Lepidocoleidae. Anatifopsis Jf'ariielli nov. 



Pseudoniscus. 



The eyes of this genus have for some time been an object of speculation. Niesz- 

 kowski, pi. 2, fig. 15, who first described a Pseudoniscus, figured a small incision along 

 the edge of the fixed cheek as place for the eye; Eichwald Lethaea Ross, p. 1445, 

 speaks there of large lunular eyes, and Woodward, Mong. of the Merostoma, p. 177, 

 fig. 65, restored the cephalon completely with eyes. 



The author describes. Pseudoniscus Roosc-velti Clarke and P. Clarkei nov., a Bertie 

 Waterline species. 



Echinognathus Clei'elandi ^^'alcott. Eusarcus Irignnus nov. 



Article II. Notes of the habitat of the Eurypterids. 



Article IV. A new Ceraurus from the Chazy, by Percy E. Raymond. Ceraurus 

 Reiidemanni nov. 



Article V. The presence of a median eye in Trilobites. 



Gives figures in text of Lwtclus gigas and Basilicus iryannus. It is claimed in this 

 paper that most, if not all, Trilobites possessed a median or parietal eye on the glabella. 

 A great number of species, belonging to more than 30 genera, possess a distinct tu- 

 bercle -on the glabella. This tubercle occurs alone in many genera otherwise smooth, 

 as in Asaphidae and is hence of functional importance. The author gives a list of the 

 species with median eye tubercles. 



Article VI. The cephalic suture lines of Cryptolithus. 



The author gives figures in the text of Dionidc formosa Barr., D. aira Salter and 

 Cryptolithus tessclatus Green. The author concludes that these genera are not Hypo- 



