218 CALIFORNIA ACADEMY OF SCIENCES. 



The aiithoi- describes a new siiecies of Asnjihtis from the Upper Silurian 

 of Perry County, Tennessee, as Asaphus megalophthalmus, p. 94, pi. 11, 

 figs. 1-5, and an undescribed trilobite, ^\. 11, figs. 6-7. The first is a 

 Phacops approaching P. hudsoni Hall, the second a species of the genus 

 Dahyjcmiten. 



Tschernyschew (Tli.) Die Fauna des mittleren mid 

 oberen Devon am West-abhange des Urals. 



In Mem. dii Comite Geo!., vol. 3, No. 3, 1887, p. 13. 



Dechenella romanovsM n. sp., D. haldcmaiii Hall., D. aff. vernfuili Barr. 

 Goldius (Bronteus) granulatus Goldf. Leperditia mljlleri Schm. Isochilina 

 biensis Griin. 



Tullberg (S. A.) Om Agnostus-ixvteYn'ci i de Kambriska 

 afiagringarne vid Andraruni. 



In Sveuska Geol. Uudersok., series C, No. 42, 1882, 2 pis. 



The author divides the Agnosti into four groups, as follows: 



Longifrontes: This section is distinguished by its strongly projecting 

 glabella and axis, which is iisually moderately long. Crust smooth. The 

 cheeks grooved. The shell on both the cheeks and tail is provided with 

 elevated granulations. Limb is generally narrow. The cheeks in front 

 of the glabella, and side lobes of the tail behind the axis, are divided by a 

 groove. 



Agnostus atavus u. sp., A . gihhusJAnr^., A. fissiis'Lvindigv., A. iiitermedius 

 n. s^)., ^-1. punctuosus Aug., A. elegans n.sp., A. hyhridus Brog., A. inccrtns 

 Brog., A. lundgreni n. sp., A. nathorfiti Brog., .4. exsculptus Aug., .4. acu- 

 leatus Aug., A. reti.culatusA.ng., A. trisectus Salt., A. pislformis Liune, .4. 

 cyclopyge. n. sp., A. pusillus n. sp. 



2. Lfevigati: The dorsal groove outlining the glabella and axis of the 

 thorax are obsolete. Crust smooth and shining, sometimes with slight 

 indications of stria^. Limb on the head disappearing; on the pygidium it 

 becomes broad. 



Agnostiis cicer n. sp., .4. nudus Beyr., also var. scavifus n. var. and var. 

 marglnatns Brog., A. gland/for miti Aug., .4. litvigatxs Dalm., ,4. hitubercu- 

 latus Ang. 



Limbati: General form subquadrate. Head has a broad limb. Basal 

 lobes are large. The cheeks in front of the glabella are divided by a 

 central groove, striated on the sides. Pygidium is usually provided with 

 lateral spines. 



(a) Eegii: Agnostiis regius Sjogr., A. rex Barr. This subdivision is 

 distinguished by its broad limb diminishing cheeks on the head and side 

 lobes of the tail (especially by the front lobe of the glabella). 



(b) Fallaces: This series has a smaller head, moderately broad limb. 

 Cheeks large. Basal lobe rather large, also by the third joint of the tail 

 which is enlarged. 



