156 RKCORDS OF THE AUSTRALIAN MUSEUM. 



Flinders River, Queensland. — Portion of a whorl, the flank 

 cost 86 either single or in fasciculi of two, chiefly the latter, each 

 fasciculus and single costa tuberculate along the abdominal lines. 

 The venter is low convex, and in crossing it the single costal 

 become duplicated as well as those forming the fasciculi (PL 

 xxxix., figs. 2 and 3). 



Saltern Creek, Queensland. — Portion of a whorl, the venter 

 low convex, the flank costai again slightly sigmoidal in fasciculi 

 of three to five. These fasciculi are complex, thus : — the nodes 

 alon» the abdominal lines unite two or three costa? as the case 

 may be, each group with an anterior and posterior rib derived 

 from the others by bifurcation, the latter passing over the venter 

 free without reference to the tubercles. On the other hand, those 

 united by the tubercles either retain their individuality of two 

 or three, or become four to the bundle (PI. xl., figs. 3 and 4). 



Wellshot (?), Queensland. — Portion of a large shaft or limb 

 without the compressed or "lean" appearance already referred 

 to, tentatively referred to C '. Jlindersi. The venter is decidedly 

 convex, the fl^nk costa? faintly sigmoidal, and less oblique than 

 in the two preceding instances. The abdominal tubercles either 

 unite fasciculi of two flank costa?, or a tubercle of equal size 

 interrupts the course of a single rib, but in either case all the 

 costa? on crossing the venter are double. Here and there single 

 costa? of equal strength to the former are interpolated between 

 the fasciculi without relation to the latter, and are non-tuberculate; 

 these encircle the whole limb. Another modification occurs by 

 the anterior costa of one fasciculus, and the posterior of the 

 fasciculus preceding being derived by bifurcation from one and 

 the same parent rib along the mid-lateral or dorsolateral lines. 

 This is the most varied decoration of any of the specimens 

 referred to C. Jlindersi, and, as already stated, the specimen is 

 only pi-ovisionally placed with that species (PL xxxvi., fig. 2; 

 PI. xlii , fig. 2; PI. xliv., fig. 2). 



C . jlindersi, by the characters of its costfe and tubercles, much 

 resembles the European C. seeleyi, N. it U."' ; 



In the specific description reference is made to the low convex 

 or almost truncate condition of the shaft venter. This feature is 

 reproduced in even a more marked degree on the shaft venter of 

 C. cordycepoides, mihi,"' 7 and were it nut for the second line of 

 tubercles, dorsolateral in position on the latter, and the 

 difference in size, it would be difficult to separate C. cordycepoi<1>* 

 from C. jlindersi. 



•"'■Neuiiiaviand Uhlig — Palaeontographia, xxvii., 1881, p. 1S5, pi. li., f. 1. 

 :17 Etheridge— S. Austr. Tail. Papers, 1905, No. 71, p. 14. 



