40 SAN DIEGO SOCIETY OF NATURAL HISTORY 
GURICH (Georg)—Continued 
Bollia sp. 
New genus Polyzgia, type P. symmetrica. 
New genus Poloniella, type P. devonica. 
Bythocypris polaris n. sp. Bairdia devonica n. sp. 
Nachtrage zum Palwozoicum des Polnisschen Mittlegebirges. 
Neuen Jahrb. fiir Mineral Geol. and Palaeont. Beilarge, Band XIII, 1900, pp. 331- 
388, plates 14 and 15. 
The author describes several new species of Trilobites, which he illustrates as — 
Illaenus polonicus nov. sp. which he compares with I. parvulus Holm and Panderia 
minima Volborth. Aeglina Kontkiewiczi nov. sp. figure of the pygidium. Proetus 
margaritaceous Gir., fig. in text, P. pyriformis sp. noy., fig. of glabella, P. Michalskii 
Gur. Dechenella pusilla Gir. Beyrichia trigonata Gur. 
— Jura und Devon Fossilien von White Cliff, Australien. 
Neuen Jahrbuch ftir Min. Geol. and Palaeont. Beilage, Band xiv, pp. 484-539, 
plates 18-20, 1901. 
The author describes a new genus of Lichas as Craspedarges including under it 
one species, C. Wilcanniae Gurich. He also gives figures of Euarges meridionalis 
Frech and F. granulosus F. A. Roemer. The author uses as subgenera to Lichas the 
following subgenera: 
Ceratages for the preoccupied term Arges Goldf., with L. armatus Goldf. for its 
type. 
Plusiages for Corydocephalus Corda, owing to the uncertainty attached to Corda’s 
types, Type L. palmatus Barr. 
Liparges substituted for Corda’s Dicranoymus, type L. simplex Barr. 
Trachylichas name proposed in place of Dicranopeltis Corda, type Lichasscarba 
Beyr. 
Echinolichas Gurich type L. eriopis Hall. 
Metopolichas used for preoccupied name Metopias Eichw., type L. Hubneri Eichw. 
Platopolichas Gurich, tvpe L. avus Barr. 
Platylichas, type Lichas margaritifera Nieszk. , 
Dr. Gurich takes Platymetopus Holmi Schmidt as the type of this genus, but it 
should be abandoned for the group, as it was used by Dejean in 1829 for a genus of 
insects. 
Pterolichas for rctinurus Boltoni. 
Platynotus was used by Conrad in 1838 for the same species. 
Euages for preoccupied term Acanthopyge Corda, type L. Haureri Barr. 
Leiolichas Schmidt, type L. t/laenoides Nieszk. 
Homolichas Schmidt, tvpe L. depressus Ang. 
Hoplolichas Dames, type L. tricuspidata Beyr. 
Ceratolichas Hall and Clarke, type L. gryps Hall. 
Conolichas Dames, type L. aequiloba Steinhardt, 
Hemiarges Gurich, tvpe L. Wesenbergensis Schmidt. 
Platymetopus Ang., type L. planifrons Ang. (Amphilichas Raymond). 
Oncholichas Schmidt, type L. ornatus Ang. 
Hall (James). Relations of the genus Hurypterus. 
Proc, Am. Acad. Arts and Sci., vol. 4, 1860, p. 353. 
On the genus Eurypterus. 
Trans. Albany Inst., vol. 4, 1860, p. 280. 
