Annals of the Transvaal Museum 
27 
Pachydiscus simplex is very closely related to Pachydiscus Cricki Kossmat, 
especially because the ornamentation appears to be the same. There are, how- 
ever, typical differences. P. Cricki has relatively much thicker whorls and a 
relatively smaller umbilicus. The lobe-line shows a typical difference in its 
umbilical portion, which runs obliquely backwards in P. simplex and is nearly 
vertical and shorter in P. Cricki. Pachydiscus Ganesa Forbes sp. shows 
totally different relations. 
Three specimens of this species have been found. 
Genus HAUERICERAS de Grossouvre. 
Hauericeras Gardeni Baily sp. Text-fig. 15. 
1855. Ammonites Gardeni Baily, 3, p. 456, PI. XI, fig. 3. 
1864. Ammonites Gardeni Stoliczka, 4 , p. 61, PI. XXXIII, fig. 4. 
1872. Ammonites Gardeni Schliiter, 6, p. 55. 
1879. Ammonites Gardeni Whiteaves, 7, p. 102. 
1890. Desmoceras Gardeni Yokoyama, 9 , p. 184, PI. XX, fig. 10. 
1894. Hauericeras Gardeni de Grossouvre, 10, pp. 219, 220. 
1898. Hauericeras Gardeni Kossmat, 12, p. 18^, PI. XXIV, figs. 7, 8, 10. 
1903 - Hauericeras Whiteaves, 7, p..352^ /"2- Z— 
1904 . Hauericeras Gardeni Yabe, 15, Pt ii, p. 32 . 
1906. Hauericeras Gardeni Woods, 17, p. 332. 
There are a dozen fairly well preserved specimens of this species in the 
collection and a good many fragmentary ones. I have nothing to add to the 
existing descriptions, except a few remarks especially on the lobe-line. In 
Baily ’s figure the external lobe is just as long as the first lateral lobe. It is 
the same in Kossmat’s and Yokoyama’s figures of a specimen from Yesso. 
In the description of this specimen Yokoyama states: “Die Loben sind 
Text-fig. 15. Hauericeras Gardeni. Lobe-line of plesiotype from ventral to dorsal line 
on a radius of about 43 mm. x 3. The longest dash-line indicates the umbilical 
edge, the shortest the umbilical suture. 
deutlich ungleich dreiteilig und ihr Mittelast greift nicht so tief hinein wie bei 
den indischen Exemplaren, in dieser Hinsicht mehr mit der Abbildung von 
Baily ubereinstimmend.” De Grossouvre states in his diagnosis of the genus 
Hauericeras: “Le premier lobe lateral est aussi long que le lobe ventral.” In 
three of our specimens the lobe-line has been developed and in all three the 
second lateral lobe is conspicuously longer than the external lobe, exactly as 
in Stoliczka’s figure. This condition is more like that of Puzosia planulata 
