rAL.EOSYOPS LEIDY, AND ITS ALLIES. 
283 
considers the condition ottlie enamel as a specific character. From the aljiindance 
of material of P. pahidosiis in the Princeton collection, I can positively state that 
wrinkled or nnwrinkled enamel will not hold as one of the specific characters of this 
species, as we have teeth showing all grades of wriidding in the same species. The 
larger molars with strongly rugose enamel, 1 believe very probably belong to the 
male, whereas the smaller and smoother enameled molars probably pertain to the 
females. 
I should add also that the wrinkled condition of the molars in this species is 
not dependant upon age, as the two series of molars show about the same stage of 
abrasion. 
Fiocek ]. Second suipcrior niolur; 1. Pahv()«yop-t pnliuliixus. 2. LiiiiiuihyapK Iriluyps. 3. Paheogy/rps 
minor. 4- Trbnatntherinm rnUriden.'t. Two-thirds natural size- 
j(a.=paracone, nie.=metacone. pr.=protocone, hy.=hypoeone, pl.=protoconulc, nd.=inetacomile. 
Inferior Dentition. — The lower incisors tire tritingular in form, and are without 
the internal basal ridge wliicli is so charticteristic of these teeth in Telmatotherium. 
Their position in the jaAV is al.'<o much less procumbent than in the latter genus. 
There was probablj^ no precanine diastema in the lower jaw of this species. The 
lower canine is very large, and less divergent than in Telmatotherium. The canine 
is ititernally flattened, the external surface being convex Avith prominent anterior 
and posterior cutting edges. The first premolar is placed close to the canine ; it is 
a single fanged tooth Avith a conical croAvn, the posterior portion of the same shoAV- 
ing a slightly enlarged heel. A considerable diastema intervenes betAveen premolar’s 
1 and 2 in this specimen (No. 10, 009), although this appears to be a A^ariable 
character, as in the Cope collection there is a mandible of this species in Avhich 
there is no Avell marked diastema in the lower jaAv. In premolars 2 and 
3 the protoconid is much larger than the hypoconid, although the protoconid 
of the second premolar seldom reaches the large size that it does in Telmatotherhim, 
Avhere the tAVO cones of tliis tootli show a much greater difference in size. In the 
last premolar the metaconid is Avell developed, and also the anterior crest of the 
V is Avell shoAvn and joins internally a small paraconid. In P. paludostis the last 
premolar is a less highly developed tooth than in Telmatotherium, as in the latter 
genus both V’s of the last premolar are Avell expressed, the jAosterior crest of the 
posterior V being Avell differentiated in T. cidtridens, Avhereas in P. pahidosus this is 
not the case ; in other Avords, the last inferior preniolar in Telmatotherium has almost 
assumed the form of a true molar, but the entoconid is still Avanting to form the 
double symmetrical V’s of the true molars. Both the internal and external face of 
38 .TOUB. A. N. S. I’lIILA., VOL. IX. 
