BIBLTOGRAPITY OF PAL.W)Z()If" ORFRT ACpA 123 



WALCOTT (Charles P.)— Continue d 



contracts in front of the pits in the dorsal furrow; also that the pleural lobes of the 

 pygidium of Olenoides have broad, shallow furrows, with sharp, narrow ridges sep- 

 arating them; while those of Dorypyge have narrow furiows, with broad, rounded 

 ridges between them. Type D. r'n htliofeni Dnmcs, 18S3. 



Dorypyge hisplnosa Wale, D. r'u hlliofi'tii Dames, 1). r'u litliojcni loevis Wale. 



Genus Teinistion Monk, 1903. 



The genus is characterized by the jieculiar glabella, narrow frontal margin and 

 spinose pygidium. Type T. Innsi Monke. 



Teinistion alcon Wale, T. lansi Monke, T. sodeni Monke, T. iypiidlis Walcott, de- 

 scribed under the genus Dorypygella by Walcott, 1905. 



Genus Stephanocare Monke, 1903, syn. Damesella C'hione \\'alcott, 1905. 



Stephunocare Mnnkei Walcott, .V. riclilliofeni Monke, syn., D. ihiane Wale, 5. sinensis 

 Bergeron, S. sp. undt. 



Genus Blackwelderia Walcott, 1906. 



The genus differs from Teinistion in the character of the associated free cheeks and 

 pvgidia, and the frontal limb of the cephalon; from Dorypyge in the form of the gla- 

 bella and free cheeks. The thoracic segments are alike in the two genera, and the 

 pvgidia are of the same type. 



Blcuk'ivetJeria alastor Wale, described under Dorypygella in 1905, B. cilix Wale, 

 described under Olenoides Pin 1905, B. sinensis Bergeron described under Calymmene ? 

 in 1S99. 



CJenus Damesella Walcott, 1905. Type D. hlack^vehieri Wale 



1 he author remarks that in Damesella and Stephanocare the facial suture cuts the 

 posterior lateral margin outside of the genal angle, so as to leave the genal angle on 

 the fixed cheeks, and at the same time the spine, corresponding to the genal spitie in 

 other genera of the order Proparia, on the free cheek, so Beecher's classification should 

 be modified in relation to the exceptions made in these genera. 



Damesella hellanranulala \\'alc., D. bla( ki'.rlJeri W^ale, D. hrevieaiulata Wale, D. 

 sp. undt. 



Genus Drepanura Bergeron, 1899, Genotype I), pmnesnili Berg. 



Drepanura ketteleri Monke, D. premesnili Bergeron. Ptyclioparia Corda, 1S47. 



In this memoir the genus is restricted to species ha\ing the characteristic of Ptyclio- 

 paria striata Emmrich. 



Ptyilioparia axlis Wale, P. aranosa \^'^alc., /'. impar Wale and var., P. kochihei 

 Wale, P. ligea Wale, P. lilia Wale, P. tolas, P. typus Dames. 



Subgenus Ptychoparia ( Emmrichella) \\'alcott, 1911. 



Genotype Ptyclioptiria theano Wale 



The subgenus differs from the following genera: 



1. Ptychoparia in its smooth glabella and larger palpebral lobe. 



2. Liostracus in having an arched or nearly flat frontal limb and rim anil more 

 convex cranidium. 



3. C'onokephaliiia in its smoother glabella and wider fixed cheeks. 



4. Anom(K'are in its smoother glabella and distinct palpebral ridge, and propor- 

 tionately shorter eye-lobes and glabella. 



The author described under this subgenus the following species: 



Ptychoparia (Emmerichella) bromus Wale, P. (E.) ronslrida Wale, P. (E.) eriopia 

 Wale, P. (E.) mantoensis, P. (E.) theano W^alcott. 



CJenus Liostracus Angelin, 1854. CJenotype /,. aiiileatus. 



Two species \vliich the author classes uiuler the subgenus Emmrichella — mantoensis 

 and constricta — approach most nearly to the genus Liostracus. 



Genus Conoke|ihaliiia Bnigger, 1886. Genot\pe C. ornatits Brogger, 1877. 



