28 CALIFORNIA ACADEMY OF SCIENCES. 



Om Paradoxides skifrene ved Krekling. 



In Nyt Mag. Naturvid., vol. 24, pt. 1, 1878, 6 pis. 



Etage Ib: Olenellus (Paradoxides) Tcjerulfi Linrs. Arionellus primaevus 

 n. sp. 



Etage Ic: Paradoxides tessini Broiig., P. rugulosus Cord. Liostracus 

 aculeatus Ang., L. linnarssoni n. sp., L. microphtalmus Ang. Conocoryphe 

 sulzeri Schloth. Elyx latilimbatus n. sp. Conocej)halites ornatus u. sp. 

 Arionellus difformis var. aculeata. Agnostus gibbns Linrs. also var. hybrida, 

 A.fallax Linrs. also var. tricuspis, A. punctuosus Ang. also var. affinls and 

 var. bipunctata, A.incertus n. sp., A.nathorsti n. sp., A . parvifrons Linrs., 

 also var. mammillata and var. nc2ios, A. truncatus n. sp., A. nudus Beyr. 

 var. marginata, A. cjlandiformis Ang. (?) A. A . Icavigatus Dalm. 



Etage Id: Paradoxides forchammeri. Dolichometopus suecicus. Lios- 

 tracus microphthalmus. Solenopleura brachymetopa, S. holometopa. Ano- 

 mocare excavatum, A. ? magmum n. sp. Ellipsocephalus circulus n. sp. 

 Arionellus difformis and var. aculeata var. acuminata. Agnoslus fallax, 

 A. kjerulfi n. sp., A. nathorsti n. sp., A. aculeatus, A. brevifrons, A. 

 glandiform, A. Icevigatus also var. armata, forfex and similis, A. bituber- 

 culatus. 



Die Silurischen Etagen 2 und 3, im Kristian- 



iagebiet und auf Eker. Kristiania, 1882, 376 pp., 12 

 plates. 



Ostracoda: Beyrichia nana n. sp. Isochilina ? socialis n. sp. 



Trilobitss: Agnost'us pisiformis Linne, also var. socialis Tullb., A. sid- 

 enbladhi Linrs., A. reticulatus Ang. Ampyx domains Ang., A. nasutus 

 Dalm. Trinucleus. Nileus subgenus Symphysurus incipiens n. sp., S. 

 angustatus Sars. & Boeck., S. palpebrosm Dalrn. 



Subgenus Nileus Dalm. (sens, strict), jiV. limbatus n. sp., N. armadillo 

 Dalm., also var. dej)ressa Sars. & Boeck. var. oblongala Boeck. Niobe 

 obsolela Linrs., N. Iceviceps Dalm., N. insignis Linrs., N. emarginula Aug. 

 Piychopyge angustifrom Dalm., P. limbata Ang. Megalaspis polyphemus 

 n. sp., M. stenorachis Aug., M, planilimbata Aug.? M. explanatce Aug., 

 M. limbata Boeck var. minor, M. limbata Boeck var. typica, M. extenuata 

 Wahl., M. yrandis Sars., M. gigas Aug., M. heroides n. sp., M. acuticauda 

 Ans., M. heros Dalm. Asaphus expansus Linne var. incerta, A. raniceps 

 Dalm., A. acuminatus Boeck, A. striatus Sars., A. striatus Sars. & Boeck 

 form typica. Illcenus subgenus Dysj)lanus centrotus Dalm., I.dalmani Vol- 

 borth. Euloma ornatum Ang. Olenus (sens, strict.), 0. attenuatus Boeck, 

 0. aculeatus Ang. Subgenus Parabolina spinulosa Wahl., P. heres n. sp. 

 Subgenus Parabolinella n. subgenus P. limitis n. sp., P. rugosa n. sp. 

 Peltura subgeuus Protopeltura n. subgenus P. acanthura Ang. Peltura 

 (sens, strict.), P. bidentata n. sp., P. planicauda n. sp., P. scarabceoides 

 Wahl. also var. acutidens, P. scarabceoides form typica. Subgeuus Cyclog- 



