34 Frederick Clucpritan : 



Genus Scald icetus, Du Bus. 



Scaklicetns lodyei, sp.. nov. (Plate TV., Fig. fi). 

 Descrijitio^i. — Tooth, long, slender, conical, gently curved, 

 especially in the apical portion. Pnlp cavity open, narrow and 

 apparently not very deep. The cement is smooth, but marked with 

 microscopically fine longitudinal lines and cracks; it extends for 

 76.5 mm. from base of enamel cap doAvn to the root, and is of a 

 rather pale ochreous brown. The cement is corroded or eaten away 

 in large patches, and the exposed dentine is encrusted in places with 

 a nubeculai-ian foraminifer, and there is also a valve of Bimya 

 sp. attached to the surface of the root. The enamel cap, of a warm 

 sienna brown colour, is longitudinally grooved and crenulated, but 

 the relief is not so granulate as in the tooth of S.macgeei. Chap- 

 man. i Where the enamel is fractured the apex shows the dentine to 

 he compact, semi-vitreous and dark brown in colour, weathering to 

 ochreous. 



Measuremenls. — Tooth, present length. 102.5 mm. ; portion of 

 apex missing, circ. 2 mm. Length of enamel cap when complete, cir. 

 15 mm. Diameter of tooth at base of enamel cap, 8 mm. ; greatest 

 diameter of root (at 2.3 mm. from base), 20.5 mm. ; diameter of pulp 

 cavity at base, 10 mm. 



Weight. — The tooth referred to the above species weighs 1| oz., or 

 .104 kilogrammes. That of Scaldicefiis ?nacf/eei Aveighs 6 oz. 2 dwts., 

 or .423 kilogrammes. The largest tooth of the genotype, S.carrefi, 

 weighs 1^ kilogrammes. 



Observations. — In comparing the tooth of Scah/icetiis lodgei with 

 that of the previously described S.macgeei, the following salient 

 differences are noted : — 



S. lodgei. 



Crown one sixth of entire length. 

 Enamel cap finely striated and cren- 



ulate. 

 Apex of crown sliarjily conical. 

 Root gradually widenin^jf to near base 



and then contracting. 

 Pulp cavity narrow, opening elip- 



tical. 

 Weight, .104 kilos. 



S. inncgeei. 



Crown one third of entire length. 

 Enamel cap rugosely vertically 



striated. 

 Apex of crown broadly conical. 

 Root widening rapidly to base. 



Pulp cavity large, open and sub- 

 circular. 

 Weight, .42.S kilos. 



From the two previously described species of Scaldicetiis, the 

 present form, S.lodgei, differs very nxarkedly in its slender shape 



1 Records Geol. Surv. Vict., vol. iii., pt. ii., 1912, p. 236, pi. xl. 



