36 SAN DIEGO SOCIETY OF NATURAL HISTORY 
GRABAU (A. W.)—Continued 
7 to 20 mm. Ptychoparia Rogersi Walc., P.? attleborensis S. and F. Paradoxides 
Harlani Green. 
The author remarks that among the American relative of Paradoxidvs Harlani the 
most nearly related to the broad form is P. regini Matthew, from St. John Group; 
also P. Bennetti Salt. 
The nearest relative of the narrow form is the Paradoxides spinosus the Bohemian 
species. Many years ago Linne Mus. Tessiniaum, 1753, p. 98, pl. 3, deseribed under 
the name of Extomolithus paradoxus a trilobite of a wide form, about 634 inches long. 
Brongniart describes it as Paradoxides Tessini, using the narrow form of Wahlen- 
berg’s pl. 1, fig. 1, which he has copied. 
The original, quoted from Dimbo, Sweden, by Linné, has never been again found 
in Sweden, the specimen may be one from Boston, Mass., obtained from the Boston 
Wharves by some Swedish naturalist in early days, the stones from the Braintree quar- 
ries were used in the Boston Harbor. 4 
Guide to the Geology and Paleontology of the Niagara Falls 
and vicinity. 
Bull. No. 45, vol. 9, 1901, New York State Museum. 
The following Foss crustacea are described and illustrated: 
Iscochilina cylindrica (Hall). Leperditia scalaris Jones, fig. 150. Bollia symmetrica 
(Hall), fig. 151. Ahmina spinosa (Hall), fig. 152. 
Trilobita—Homalonotus delphinocephalus (Green), fig. 153. IJllaenus ioxus Vall, 
fig. 154. Dalmanites linulurus, fig. 155. Calymmene Blumenbachi Niagarensis Hall, 
fig. 156. Lichas Boltoni, plate 17. Encrinurus ormata H. and W., fig. 157. Bronteus 
Niagarensis Hall, fig. 158.  Ceratiocaris acuminata Hall, fig., C.  Physganocaris 2? 
Deweyi Hall, fig. 160. Eurypterus lacustris Harland, E. remipes DeKay, fig., pl. 18, 
E. pustulosus Hall, E. robustus Hall, E. pachychirus Hall, E. Dekayi Hall. Dolichop- 
terus macrochirus Hall. Eusarcus grandis G. and P. Plerygotus macrophthalmus 
Hall, P. Cobbi Hall, P. globicaudatus Pohl. 
The Paleontology of Eighteen Mile Creek and Lake Shore 
sections of Erie County, New York. 
Bull. Buffalo Soc. Nat. Sci., vol. 6, 1901, in four parts. 
Ceratocaris Deweyi Hall, C. acuminata Hall. 
Guide to the Geology and Paleontology of the Niagara Falls 
and vicinity. 
Bull. Buffalo Soc. Nat. Sci., vol. 9, 1902. 
and Sherzer (W. H.) The Monroe formation of southern Mich- 
igan and adjoining regions. 
Michigan Geol. and Biological Sur. Geol., ser. 1, 1910. 
Ostracoda—Leperditia scalaris Jones, L. angulifer Whitf., L. attoides nov., L. alta 
Con. Kloedenia Monroensis nov. 
Trilobitae—Proetus crassimarginatus Hall. 
Merostomata—Eurypterus Eriensis Whitt. 
North American index Fossil Invertebrates. 
Two volumes, New York, 1910, 909 pp., 726 figures. 
Gives brief descriptions of genera and species. Appendices give tables of geological 
formation and a faunal summary showing distribution, also a classified bibliography. 
