BIBLIOGRAPHY OF PALAEOZOIC CRUSTACEA. 67 



Foerste (A. F.) The Clinton group of Ohio. 



In Bull. Denison Univ., vol. 1, 1885, p. 63, 2 pis. 



Acidaspi*. Bathyurus?. Arionellus?. Illcenus daytonensis H. & W., /. 

 madisonianus Whitf., /. ambiguus n. sp. Calymene blumenbachii ?. Lichas 

 breviceps Hall. Dalmanites werthneri n. sp. 



The Clinton group of Ohio. Part 2. 



Iii Bull. Dennison Univ., vol. 2, 1887, p. 89, pi. 8. 



Ceraurus. Acidaspis ortoni n. sp. Proetus determinatus n. sp. Illcenus 

 draytonensis, I. mad i son! anus, I. ambiguus Foerste. Calymene vogdesi n. sp. 

 Lichas breviceps Hall. Phacops pulchellm n. sp. Dalmanites werthneri 

 Foerste. Encrinurus thresheri n. sp. 



Note on Illseni. 



In Fifteenth Kept. Geol. Nat. Hist. Survey Minnesota, 1886, p. 478. 

 Illcenus (Nileus) minnesotensis n. sp., /. herricki n. sp., /. ambiguus 

 Foerste, /. insignis Hall. 



Note on Palaeozoic fossils. Part 2. 



In Bull. Denison Univ., vol. 3, pt. 2, 1888, p. 117, pi. 13. 



Microdiscus punctatus Salt. Lichas halli n. sp. Sphcerexochus mirus 

 Beyr. Encrinurus boivningi n. sp., E. mitchelli n. sp. Phacops serratus 

 n. sp. Lichas trentonensis Conrad, breviceps Hall. 



Notes on Clinton group fossils, with special 



reference to collections from Indiana, Tennessee and 

 Georgia. 



In Proc. Boston Soc. Nat. Hist., vol. 24, 1889, p. 261. 



Calymene blumembachii var. vogdesi n. var., C. rostrata Vogd. Illatnus 

 ambiguus Foerste, /. ioxus [Hall. Phacops pulchellus Foerste. Encrinurus 

 punctatus Wahl. Lichas boltoni var. occidentalis ? Hall. Cyphaspis clintoni 

 n. ,sp. 



Forbes (Edward). Description of Ampyx nudus. 



In Mem. Geol. Survey United Kingdom, decade 2, London, 1849, pi. 10. 



Ampyx nudus Murch., A. tumidus n. sp. Brachampyx n. g. 



The author makes the following remark: "If, in the end, all the five 

 ringed species should prove to have long heads, and those with 6 thoracic 

 segments to have short and rounded ones, the latter section may be con- 

 veniently distinguished from the former as a subgenus, under the name of 

 Brachampyx . 



The author erroneously included the type of the genus, Ampyx nasutu* 

 Dalm., in his new subgenus; the term is misplaced and should be aban- 

 doned. 



