Genus Agnostus.— Vogdes. 379 
Hist. The memoir describes the fossils of the Dikelocephalus zone of 
Wisconsin. In this work we have illustrations and descriptions of 
Agnostus josepha, A. parilis and A. disparilis. The first species ap- 
proaches A. cyclopyge Tull. of the Olenus zone of Sweden. The second 
is of the type Levigati of which A. Jwvigatus Dalm. is its nearest congen- 
eric form. Dr. Shumard described in the Am. Jour. Sci., vol. 32, 1861, 
p. 218, Agnostus coloradensis from Burnet county, Texas. This species is 
of the type A. neron H. & W. 
1864—Salter in the Mem. Geol. Survey, Decade XI, describes tive new 
species of the genus as follows: <Agnostus princeps also vars. ornatus and 
rudts (Olenus zone). (This species is of the type A. atwvus, gibbus, punc- 
tuosus, americanus), Agnostus maccoyzi, Upper Llandeilo Flags, Wales, 
A, limbatus, Caradoc, A. morea, Lower Llandeilo, A. trinodus, syn. of A. 
agnostiformis M’Coy, A. trisectus, Upper Lingula. (This species occurs 
at Andrarum with Peltuwraand Sphwrophthalmus). 
1865—Billings in the Palreozvic Fossils of Canada, vol. 1, redescribes 
A, americanus, A, orion and A. canadensis. The author adds two new spe- 
cies to the list from the so-called Quebec group of Newfoundland, 
Agnostus galba, and A. fubicus. The former species differs but slightly 
from A. tardus Barr., Etage D,in Bohemia. The latter approaches A. 
lentiformis Ang., Regio C, of Sweden. 
1866—Schmidt describes a new species in the Bull. Acad. Sci., St. 
Petersb , vol. 30, 1866, p. 505, fig. 45, Agnostus cyckanowskii. 
1866—Linnarsson describes a new species in Om de Siluriska bildnin- 
garne i Mellersta Westergotland; Agnostus ajfinés from the zone with 
Paradoxides tessint. 
1867—Belt in the Geol. Mag.,, vol. 4, p. 294, describes Agnostus nodosus 
and A. pisiformis var. obesus, from the “Upper Cambrian” of Wales. 
Tullberg remarks that A. nodosus Belt is probably identical with A. re- 
téculatus Ang. The author illustrates a broad and narrow form of A. 
pisiformis var. obesus. In vol. 5, 1868, of the same magazine, the author 
describes Agnostis obtusus from the Upper Dolgelly and A. barlow?d from 
the Tremadoc. 
1868—Barrande describes Agnostus bavaricus, in Fauna Silurienne des 
environs de Hoff en Baviere, p. 32, figs. 46-47. 
1869—-Linnarsson, Om Vestergétland Camb. & Sil. aflagringar. The 
author describes 8 species of Agnostus including the following new 
species, A. gibbus, A. parvifrons, A. sidenbladhi, and A. fallax. The first 
two species occur with Puaradoxides tessind at Andrarum, Agnostus 
sidenbladhi ranges higher up in the Ceratopyge chalk. 
Sjogren in Om nagra forsteningar i Oland Kambriska lager 1871, de- 
scribes Agnostus regius from the zone with Puradoxides vlandicus. 
1871—Hicks in the Quart. Jour. Geol. Soc., vol. 27, 1871, p. 400, de- 
scribes a new species, Agnostus cambriensis. 
1872—Meek in the sixth Report U. 8. Geol. Sur. Territories, p. 664, 
gives the name of Agnostus maladensis to a species from Malade City, 
Utah; and that of Agnostus bidens to one from Gallatin City, Montana. 
1872—Hicks in the Quart. Jour. Geol. Soc., vol. 28, 1872, p. 174, de- 
