PEA aE ox. 
DIGEELOCERHAVUBHT VAN GUS TIE RONG is- nae cmanier es conde om os Sclocen tec cab onic bake weulCawercecceacs 
Fig.1. View of the movable cheek associated with the glabella, 
la. View of the glabella, palpebral lobes, and outline of the convexity of the glabella. 
Natural size. 
1b. A pygidium occurring in the same hard specimen of rock. Natural size. 
OGYGTA)T PROBIE MANOA sano e an oe en sec tame ceed Seitesleuasiscoa messes bowede cawece 
Fig.2. Usual form of the head of the adult, with the facial sutures and outline of the con- 
vexity of the glabella. Natural size. 
2a. Pygidiuim associated with the head and fragment of the thoracic pleura, repre- 
sented by fig. 26. See fig. 4. 
PTY CHOPARTA\ OWENI- s2\o2c scte'sinela =ieieis Secs sice oo clei seeieeiee ee see ecclcb aces ccc ctawecsecicwccees 
Fig. 3. Nearly complete head within the facial sutures, enlarged to two diameters. 
3a. Pygidium associated with the same, similarly enlarged. 
OGY GIAVIEPROBLEMATICAV= <= 52s cciaces dec s esses ooSs,coas/scuesccostesbccss anes ceccieecccecass 
Fig. 4. Enlargement to four diameters of a small head, in which the movable cheeks are 
absent, the postero-lateral limbs are broken away, and the glabellar furrows obso- 
lete. There are specimens intermediate to those represented by fig. 2 and fig. 4. 
EY CHOPARLAY OCCIDENTALIS! -sielsis ome aanocls aein(= isin iaeielsin(a 22 alesse sana sein ton(oSsious\eomocsicncess 
Fig. 5. View natural size, showing the features of the glabella and fixed cheeks. 
IDICHLEELOCEPHAT US RIOHMONDENSIS te ieicts ain ciccisiode ss sa cleieiscte ce isis sie seleso cin te eivin Seecieiseanic 
Fig. 7. View of the central portions of the head, showing the broad frontal limb and fixed 
cheeks. Natural size. 
IPTV CHOPARTA TEER RNASUEUBS eo = nie ale cclascaiSa cates oe woiesc ays Sema aisoccict dele Semin soemce meetmswces 
Fig.8. Upper view of the head parts discovered. The nasute projection of the frontal 
border is a little short in the figure. Natural size. 
8a. Movable cheek, associated with the preceding. 
8b. Lateral view of the specimen from which fig. 8 was drawn. 
PTYCHOPARIA (SOLENOPLEURA) BREVICEPS ...-.---.---------- aeeiaetelsicertelamieieee aloes enaiannel 
Fig. 9. View of the type specimen to show the broad, short form of the head, and rounded 
conical glabella, enlarged to three diameters. 
ET CHOPARLAG (G) ISIMITESeemacerrae sy orccloser neste aicecne-svee sales seabed piwcae cece <0 
Fig. 10. Enlargement to two diameters of the central portions of the head, showing the char- 
acter of the frontal limb and glabella. 
DOHA, -- - 2 ooo doecea Gags SoA POS OnSnS 2650 COON 0500 Kade GEEO EOS CBOE HOD ESD EDE EES GEEBe 
Fig. 11. Movable cheek, associated with Piychoparia unisulcatus. 
PIV. CHOPARTAG(hin ) PAMEINIS fetine a cisisaemisc en iaa cate cckiaa selec ce laioala's'ajcens lem Sriemicce socniocanelnae 
Fig. 12. View of specimen, showing the narrow frontal limb, as compared with fig. 10, and 
the strongly-marked glabellar furrows, enlarged to two diameters. 
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