182 Annals of the South African Museum. 



anterior arching) when passing across the anti-siphonal side. In 

 addition to these lines there are very faint and indistinct shallow 

 depressions of the surface, of varying breadth, which follow a course 

 similar to that of the growth-lines. 



It has only been possible to follow completely the course of the 

 septal line at an early stage of growth, where the shell has a 

 diameter no greater than 2 mm., and, as might be anticipated, the 

 suture is here of a comparatively simple character. While the main 

 lobes and saddles have come to full development as regards their 

 general course, the minor indentations of the suture have only in 

 small degree made their appearance. The siphonal, anti-siphonal, 

 and lateral lobes are narrow and deep, and have almost equal 

 elongation. At this comparatively early stage the trifid character 

 of the lateral lobe is already making its appearance. Both the 

 siphonal and lateral saddles are divided into two limbs by a narrow 

 and shallow subsidiary lobe. Each limb of the saddle is in turn 

 divided by a shallow, pointed indentation. The lateral saddle is 

 slightly broader than the siphonal saddle. The small secondary 

 saddle at the base of the siphonal lobe is at this stage weakly 

 developed and has a blunt summit. 



Dimensions. 

 Length of a specimen with body-chamber, but incomplete 



at initial and anterior ends 50 mm. 



Diameter at the posterior end 2 ,, 



Greater diameter at the anterior end 5 ,, 



Occurrence. Found on the road below the railway cutting, one 

 mile from Eawson Bridge on the main line, up side (277, 338). 

 Crushed specimens obtained from the clay-pit on the left bank of 

 Zwartkop's Eiver near Rawson Bridge (278, 339, 344), referred by 

 Messrs. Rogers and Schwarz with some doubt to Baculites, may 

 probably represent the same form. 



Remarks. The adoption of the name Bochianites, proposed by 

 P. Lory" for Baculites neocomiensis d'Orb. and its allies, seems to be 

 well justified when a comparison is made between the septal sutures 

 of the forms to which the name is applied and those of the true 

 Baculites as exemplified, for instance, by B. bacidoides (Mant.) or 

 B. bohemicus Fritsch and Schloenbach. Whether we are to regard 



* Lory (1), p. 133, footnote ; Lory (2), p. 129, footnote. [I have not been able to 

 consult the latter work quoted, but give the citation on the authority of von 

 Koenen (2), p. 397, and G. Boehm (3), p. 26. The papers Lory (1) and Lory (2) 

 have identical title and date of year, but I have not ascertained which was issued 

 first ; one is presumably a reprint of the other, except in pagination.] 



