| OCR Text |
Show 1 I I MR. G. HUSK ON FOSSIL REMAINS FROM BORNEO. [Julie 10, denticle, whilst the longitudinal exceeds the transverse diameter of the crown. Fig. 5. Dorsum of m. 2, R. sondaicus. Dorsum of m. 2, R. sumatranus. 2. As regards R. etruscus, which, in the crochet and posterior vallum, exhibits the same characters as R. sondaicus, the distinction from the Sarawak fossils, and from the latter species, is to be sought (1) in the dorsal surface, in which the anterior costa is very little prominent, and much narrower or thinner than in R. sondaicus, and the hinder border is not at all raised, so that, instead of a concavity, the surface behind the anterior costa presents a convexity. The second or median costa also is much wider and more convex, and the third |
