168 REPORT—1874. 
A. LATIROSTRIS, Jordan. 
Length of skull about once and a half the breadth. Orbit roundish oval. 
Measurements (from Von Meyer, ‘ Reptilien’ &c., t. i. fig. 1). 
in. 
Length of skull along middle line....... cece cece eee eee about) 4°75 
Greatest breadth. of slo. 5.05.15 5 fut ie woibie i viel ale’ visine about) 4°75 
BreaGshiat middle Gforpits). «1. \). «tere cites pciess + si +lele slowmele 3°125 
From centre of occiput to posterior end of orbit ............044 15 
From tip of snout to anterior end of orbit.............64 (about) 2°875 
EME TNO OLbIbt ey. %,hapshetetaetelae «ki oieinyee sale eis eNainip le: ele +o \epataie et 87 
Vidi rot oxrbibi Meike tiie! okie el oteledstaeie ie Bit Es ais Tato havens ich sbay roa ae 65 
Least width of interorbital space.....5cecscsssevecesscrevsvase ‘75 
(Greateshidepth lof mandible -inuciemis .ietieedelelsmeinletoiass <tvel Sle elolels 2c 8 
Locality. Coal-measures of Saarbriick. 
References. TH. Jordan, “ Beobachtungen &c.,” Verh. d. naturf. Vereins d. Preus- 
sischen Rheinlande, vi. p. 78, t. iv. figs. 2, 3[1849].—Burmeister, Die Laby- 
rinthodonten aus dem Saarbriicker Steinkohlengebirge (Archegosaurus), p. 69, 
t. ii. figs. 8, 4 [1850]—Von Meyer, Jahrbuch fiir Mineralogie, 1854, p. 422. 
—Id. 7b. 1855, p. 326.—Id. Reptilien aus der Steinkohlenformation in 
Deutschland, p. 119, tt. i., ii. figs, 1-4 [1858]. 
VII. HELEOTHREPTA. 
Lepterpeton, Huxley. 
Skull (figure). Triangular, with produced, tapering snout. Orbits. Central, oval, 
moderate. Teeth. “There are indications of relatively long, pointed, and slightly 
curved teeth, set at intervals in the upper jaw.” Mandibular symphysis. Elongate ; 
“the slender rami of the mandible converge towards one another to the symphysis, 
where they become parallel, and are united for nearly 0°3 in.” Vertebre. About 20 
precaudal and 25 caudal vertebre ; centra elongate, narrowed in the middle; neural 
spines low, elongate. Ribs. Short and curved. Fore limb. Carpus unossified ; 
manus longer than the rest of the limb. Hind limb. “The hind limb is penta- 
dactyle, and has a small hallux, the other digits (each of which appears to have 
possessed three phalanges) being very long and slender ;” tarsus unossified; pes 
longer than the rest of the limb. Scates. Indistinct traces of a ventral armour. 
Measurements (from Prof. Huxley’s Memoir). 
in. 
pineal ena, OLisir ll! cy cysts stata afeioryohe + sisce.« 15 cee) Bpwls, shared ses ogsvats 85 
Hest CA COTMOR Didi = t0/ >, care gsepapalel vine ialons/s,c\eeiojoie ote ,0%5 (aj0le. a ists regener ae 13 
Antero-posterior depth (superficial) of average vertebral centrum.. ‘1 
Hararte HINO LAB] Uineta Ne (eee tote ots lel saisBic eictcais 10s 9up.0'6 0.0 8 Saleamiale vies ele 
SUifeseec ANG LOTS MILLI we vers (afer tats eeepc yaielsie lstatass/r/ 9.0 «11s a «(0/6 pic). ee 5 
ben endo meray ll Cher] OFS am boos Ogos UO Dao CeeO noe oa oc 85 
Total lengthof head; trunk, and'tail «2.00 tis ee le elele elena 6 
L. Doxgst, Huxley. 
Locality. Jarrow Colliery, Kilkenny. 
References. Huxley, “ Description of Vertebrate Remains from the Jarrow Colliery, 
Kilkenny,” Trans. Royal Irish Acad. vol. xxiv. p. 12, t. xxi. figs. 1, 2[1867 ]. 
VIII. NECTRIDEA. 
Urocordylus, Huxley. 
Skull (figure). Triangular, truncated behind, with rounded snout ; prominent 
epiotic cornua*; postero-lateral expansion angulated, but not produced as a horn f. 
* These are seen in the specimen described by Messrs. Hancock and Atthey, and also 
in an example found by Mr. John Ward, of Longton. 
t+ Shown in Mr. Ward’s specimen. 
