i8 
Annals of the Transvaal Museum 
I am not aware of any species with which the present can be confounded. 
Three specimens have been found. 
Genus BACULITES Lamarck. 
Baculites sulcatus Baily. PI. Ill, figs. 7, 8. 
Baculites sulcatus Baily. 3 , p. 457, PI. XI, fig. 5 c, 
Baculites sulcatus Woods. 17 , p. 341, PI. XLIV, fig. 4. 
Shell straight, tapering slowly. Transverse section generally oval, slightly 
narrower on the siphonal than on the antisiphonal side. Mostly there is a 
fairly great difference in the lengths of the axes of this oval, sometimes, how- 
ever, this difference is less, and in one case the section is nearly circular. In 
another case the antisiphonal side is somewhat flattened. No longitudinal 
grooves have been noticed on our specimen. 
The shell is ornamented with strong, rounded ribs. Starting on the siphonal 
side, they run obliquely backwards on the flanks. Some die out on reaching 
the middle of the flanks, while others continue to bend forwards on the edge 
between the flanks and the antisiphonal side. Here they form a transversely 
elongated tubercle. On the antisiphonal side they are convex forwards and 
very weak. The ribs are thicker on the siphonal side than on the flanks. The 
shell is covered by fine growth-ridges and grooves, which are fairly well visible 
in young stages, but which are far less conspicuous in large specimens. The 
ribs are stronger in young specimens than in old ones. In the largest specimen 
present they scarcely difler from the growth-lines, and the flanks of this speci- 
men are nearly smooth, except for the tubercles. The relative distance of ribs 
and tubercles varies. In small specimens they are close together; at a long 
diameter of 5 mm. they are about 3*5 mm. apart. With advancing age they 
come further and further apart; in our largest specimen, with a long diameter 
of 14 mm. and 17 mm. over two consecutive tubercles, the distance of these 
two is 28 mm. The shape of the tubercles also varies. Sometimes, and mostly 
in younger specimens, they are crescentic, while in older specimens they are 
more knob-like, although still transversely elongated. 
The lobe-line has not been seen. 
There are twenty- two fragments which are regarded as belonging here. 
Although both Baily and Woods make no mention of the tubercles, I think 
there can be no doubt, that these specimens belong to Baily’s type. They differ 
from Baculites capensis Woods {lx., p. 342, PI. XLIV, figs. 6, 7) in the trans- 
verse elongation of the tubercles. There is a slight resemblance to the orna- 
mentation of Baculites anceps Lamarck, figured by d’Orbigny (1, PI. CXXXIX, 
figs. I — 7), but it seems that Baculites incurvatus Duj. {l.c., PI. CXXXIX, 
figs. 8, 10, and Schliiter, 6, PI. XXXIX, figs. 6, 7) stands very much nearer. 
The resemblance is also striking with the figures of this species given by 
Holzapfel (8, p. 64, PI. IV, figs. 5, 6). The great difference seems to be the 
absence of the longitudinal grooves, which are present on most specimens of 
B. incurvatus, and perhaps the tubercles are smaller and rounder in our 
specimens. However, Schluter’s specimens do not show longitudinal grooves. 
Baculites Bailyi Woods. PI. HI, figs. 9, lo- 
Baculites Bailyi^oods. 17 , p. 341, PL XLIV, fig. 5. 
There are six fragments in the collection, which have been placed here. 
There is, however, still an element of doubt. Our specimens are practically 
smooth. Some of them show very faint ribs of the same shape as those of 
Woods’ type figured by Baily ( 3 , PI. XI, fig. 5 a). The transverse section of 
