198 CALIFORNIA ACADEMY OF SCIENCES. 



On a new Crustacean from Glasgow Coal Field. 



In Quart. Jour. Geol. Soc. London, vol. 19, 1863, p. 519, figs. 1, 2, 

 PalcEOcarabus russellianus n. sp. 



A monograph of British Trilobites. Pt. 3, 



pp. 129-179, pis. 15-25. 



In Palaeot. Soc. London, vol. 18, for 1864 (London, 1866). 



Ogygia angustissiman. sp., O.I (vel. Phacops) subduplicata, see Phacops 

 pi. xv, figs. 7 and 8), 0. ( Ptychopyge) corridensis Murch., 0. scutatrix 

 Salt., 0. peltata Salt., 0. selwyni Salt. 



Barrandia Subgenus Homalopteon. Barrandia ( Homalopteon) port- 

 locTci Salt., B. (Homalopteon) radians McCoy. 



Subgenus Barrandia. B. (Barrandia) cordai McCoy. Niobe homfrayi 

 Salt. 



Asaphus Subgenus 1, Ptychopyge Ang. Asaphus angustifrons Dalm., 

 A. latus Ang. 



Subgenus 2, Basilicus. Asaphus (Basilicus) tyrannus Murch., A. ( Basi- 

 licus) peltastes n. sp., A.I (Basilicus) hybridus n. sp., A. ( Basilicus ) powisii 

 Murch., A. (Basilicus) mar stonin. sp., A. (Basilicus?) radiatus Salt., A. 

 (Basilicus) laticostatus McCoy. Ogygiacorndensis Murch. 



Subgenus 3, Megalaspis. M. extenuatus Wahl. 



Subgenus 4, Isotelus. Asaphus ( Isotelus) gigas Dekay, A . ( Isotelus) 

 ajfinis McCoy, A. (Isotelus) homfrayi Salt. 



Subgenus 5, Cryptonymus. Asaphus expansus Linne, A. (Cryptonymus) 

 scutalis Salt., A. (Cryptonymus) kowalewskii. 



Subgenus 6, Symphysurus Goldf., type S. palpebrosus Dalm. 



Subgenus 8, Nileus Dalman. Nileus armadillo Dalra. 



Stygina latifrons PortL, 8. murchisoni Murch., 8. musheni n. sp. Psilo- 

 cephalus innotatus Salt., P . inflatus Salt. Phacops subduplicata Salt., pi. 

 15, figs. 7-8. Ogygia (Ptychopyge) cordensis Murch. Illcenopsis thomsoni 

 Salt., pi. 20, figs. 1, 2. 



Figures and descriptions illustrative of British 



organic remains. Decade XI. Trilobites (chiefly Silurian) 



In Mem. Geol. Survey United Kingdom, London, 1864, 10 pis. 



The article on Salteria primceva n. g. et sp., pi. 6, was edited by 

 P. Wyville Thomson. 



The genera are arranged in this work in the following order: 



PI. 1. Agnostus princeps Salt., also var. (a) ornatus, (b) rudis. 



Sec. 1. Condylopyge. Agnostus maccoyi Salt., A. rex Barr., A. morea 

 n. sp. 



Sec. 2. Agnostus, A. pisiformis Linne, A. princeps Salt., A. trisectus 

 n. sp. 



Sec. 3. Trinodus. A. tardusTSa-rr., A. trinodusSalt., A. limbatus n. sp. 



