1878.] 511 [Cope. 
from the recent species of the order in the absence of quadrato-jugal arch, 
and the remarkably developed ischia. On this account I refer to Clepsy- 
drops and its allies as a distinct suborder under the name of Pelycosauria. 
Char. Specif. The muzzle of this species is compressed and descends ob- 
tusely at the end as in Bolosaurus striatus. The nostril and orbit are quite 
large. The first premaxillary tooth is the largest and has a silky striation 
of the enamel; its crown is much less than that of the canine. The canine 
originates below a point a short distance posterior to the nostril. 
Measurements. M. 
Length of skull to posterior base of quadrate.......... 0.124 
aS GED OF AMOSUELL. os ioe visio ars a sie'e 1 ways(m ated crs dtenle ames p OLD 
WePiUMOKAVCOMA A OTD. 025 aejncice cer etemecnnermccae ke 
Reneihiot crown, of canine toothy... /<.siee x2 acess san  oOL6 
Antero-posterior diameter of canine tooth.............  .005 
The centra of the lumbar vertebre are compressed, but not deeper than 
long, nor acute on the median line below. The diapophyses are wide, -.and 
descend towards the anterior articular border. The neural spines are com- 
pressed, and are very long. Their apices are slender and curved back- 
wards. The faces of the zygapophyses are oblique upwards and outwards. 
The caudal vertebre have subround articular extremities anteriorly, and 
become more compressed posteriorly. The diapophyses are median on the 
former, and gradually become smaller to extinction. The zygapophyses 
are strong, and the neural spines continue long for a considerable part of 
the length of the entire series.. The centrum is concave below the dia- 
pophyses, and has a median inferior rib. 
Measurements. M. 
Length of centrum of fourth from last lumbar vertebra. .018 
Vertical diameter of ge ee ce 017 
Transverse diameter of ‘‘ “9 . < 018 
Elevation of neural arch and spine of last lumbar...... .087 
Antero-posterior extent of ilium:............<......- Soo alt) 
pe «4 Se DUlbiSitay-cielsuerer porn see COO 
“s a Of COMM(C Mbt eA Oates Sone) e c 
SEY slit Oy Eee TN MIE sea tee sw cr Cacinccaitn alien) Sas aey Slo 9.610 Srercdevay eS OOO 
TCH SOT METERS 3 ore cac somatic niay= wi nleiein,b:leiede- fala sia sisiej.ays| siege sie LOO 
Long diameterof proximal ends. ccacsancscacan ssa sO4L 
Ae rho Gita erect arenas Seated coos wisteraeis, wieiwiaya aie, e Sam OOD 
Mranswerseawe Cul Ofsti las ates se. ctciets eicpciataias ce secieeningrs, 029 
Length: of eleven, caudal Vertebree. < csi vec ceccseean ce cs, aLd2 
ne ** fourth caudal “ Sears! at Srogshee ave eisionece UL O 
os eS CLO VETIEM SCALA: (ceo lect raiesoeiet al oeernr a ars c a6e Ae! 
TANS VeTSe GiamMerernoh caudwler eeu emetic cscs 5, OLS 
This species differs from the @. vinslovii in the more robust caudal ver- 
tebre. It is also.considerably larger, agreeing in this respect with the C. 
pedunculatu». Inthe latter the long transverse processes are decurved 
