BIBLIOGRAPHY OF PALEOZOIC CRUSTACEA. 193 



The description of all the species, with the exception of Ampyx nudua, 

 was made by J. W. Salter. 



Phacops caudatus Briinn. var. (a) vulgaris, var. (b) longicaudatus . 



Other British species of Phacops of the section Dalmania. 



Phacops sp.? P. obtusi-caudatus Salt., P. truncalo-caudatus Portl., var. 

 (b) affinis Salt. 



Subgenera: 1, Portlockia. 2, Phacops. 3, r Dalmania. 4, Cryphceus 

 Green ( Pleuracanthus Milne-Edw.) 



Illcenus davisii Salt., /. bowmanni Salt., /. portlocki Salt., /. perovalis 

 Murch., /. ocularis n. sp., /. murchisoni Salt.,/, barriensis (subgenus 

 Bumastus). AsapMis tyrannus Murch. Ogygia buchii Brong., O.portlockii 

 Salt. Calymene tuberculosa Salt. Olenus micrurus Salt. Ampyx nudus 

 (Murch.) Forbes, A.^tumidus Forbes, also mentions Ampyx austini Portl., 

 A. mammillatus Sars., A. sarsii Portl., A. rostratus Sars., A. parvulus 

 Forbes, A. bruckneri Boll., A. portlockii Ban-. 



Description of Pterygotus problematicus Agass. 



In Quart. Jour. Geol. Soc. London, vol. 8, 1852, p. 386, pi. 21. 



Notes on the Trilobites. 



Appendix C to an article by Sefior Carlos Kibeiro on the Carboniferous 

 and Silurian formations of the neighborhood of Bussaco, in Portugal. 



In Quart. Jour. Geol. Soc. London, vol. 9, 1853, p. 158, pi. 7. 



Calymene tristani Brong., C.arago Rpuault. Asaphus guettardi Brong., 

 A. desmaresti Brong. Asaphussp.t Ill&nus giganteusJSurm. Placoparia 

 zippei Boeck ? TrinucleKs pongerardi Rouault. Ogygia ? glabrata n. sp. 



On Arctic Silurian fossils. 



In Quart. Jour. Geol. Soc. London, vol. 9, 853, p. 312. 

 Encrinurus Icevis Ang.? Proetus sp.? Leperditia balthica His. 



Figures and descriptions illustrative of British 



organic remains. Decade 7. 



In Mem. Geol. Survey United Kingdom, London, 1853, 10 pis. 



The genera are arranged in the following order: Phacops downingice 

 Murch. Sec. Acaste: 1, P. apiculatus Salt. 2, P. brongniarti Portl. 

 3, P. dalmani Portl. 4, P.jamesi Portl. 5, P. alifrons Salt. 6, P. jukesii 

 n. sp. 7, P. conophthalmus Boeck. Sec. Odontochile: P. mucronatus 

 Brong., P. amphora n. sp. Cheirurus bimucronatus Murch. Sec. Crota- 

 locephalus: 1, C. articulatusTflHinst. Sec. Cheirurus proper: 2, C. speciosus 

 Dalm. 3, C. gelasinosus Portl. 4, C. cancurus n. sp. 5, (7. octolobatus 

 McCoy. Sec. Actinopeltis: 6, C. clavifrons Dalm. 



Sphcerexochus mirus Beyr. 1, Encrinurus sexicostatus Salt. 2, E. punc- 

 tatus Briinn. 3, E. variolarisBroug. 4, E. multisegmenialus Portl. Cyphaspis 

 megalops McCoy, C. pygmceus n. sp. Acidaspis jamesii Salt., A. bispinosus 

 McCoy. 3, A. sp. ? 4, A . biserialis n. sp. 5, A. sp. ? 6, A. caractaci n. sp., 

 A. corojiatus n. sp. (A. brightii, Mem. Geol. Sur., pi. 9, figs. 8-9). 

 13 



