366 SCIENCE PROGRESS. 



molar teeth, specimens of which we know from the Spy, 

 Naulette and Bengawan remains, are quite human yet quite 

 peculiar. 



The peculiarity of the Spy and Naulette molar series 

 lies not in any singularity in size, but in the complete 

 development of each individual tooth. The Naulette in- 

 ferior molar series measures antero-posteriorly 31 m.m. ; 

 the Spy No. 1, 31 m.m. ; the Spy No. 2, 34 m.m.- 

 measurements which are large, but not exceptionally so. 1 

 The first and second inferior molars of these three in- 

 dividuals are in no way peculiar ; the first has five cusps, 

 and the second four, arranged after the usual manner. The 

 third tooth of the lower molar series, however, differs from 

 the vast majority of its modern representatives in being the 

 largest of the series. In the Naulette jaw it measures 

 antero-posteriorly 12*5 m.m.; transversely, 11 m.m.; in Spy 

 No. 1, 11 m.m. x 11 m.m., and in Spy No 2, 11*5 m.m. 

 x 1 1 -5 m.m. 



The upper molar series of the fossil men are singular in 

 showing the third molar (wisdom tooth) fully developed. 

 The dimensions of the molar series in the Spy sets are not 

 at all remarkable, measuring in No. 1, 28 - 5 m.m. antero- 

 posteriorly and 1 1 m.m. transversely ; in No. 2, ^^ m.m. x 

 12 to 13 m.m. The molar series in the Bengawan skull, 

 judging from the size of the third molar, must have been 

 of extraordinary dimensions. The third molar of the 

 Bengawan series measures 11*3 m.m. antero-posteriorly 

 and 1 5*3 m.m. transversely, against 10 m.m. and 12^5 m.m. 

 — the corresponding dimensions of the third molar of Spy 

 cranium No. 2. Wisdom teeth, which show the greatly 

 subdivided and broken-up arrangement of cusps seen in the 

 Bengawan tooth, never possess, either in anthropoids or 

 men, an antero-posterior diameter more than three-fourths 

 of either the first or second molars. We may infer, there- 

 fore, with some degree of certainty, that the Bengawan 

 molar series measured antero-posteriorly at any rate $7 



1 Flower, "The Size of Teeth as a Character of Race, ," ' Journ. Anthrop. 

 Instit., vol. xiv., 1885, pp. 182-187. 



