134 The Ottawa Naturalist. [October 



Dowling in 1902, and now in the Geological Survey of Canada. 

 It was described by the writer in the fourth and last part of 

 the third volume of " Palaeozoic Fossils," recently published by 

 the Survey, but it was not illustrated, as the type and only known 

 specimen was unfortunately mislaid. 



This missing- and previously unfigured type has since been 

 found, and it is now practicable to give two illustrations of this in- 

 teresting specimen, and to slightly amend the original description 

 of the species. 



In regard to the two foregoing text figures of C. cuneatum, 

 the explanations given below them may be supplemented by the 

 following remarks. The specimen is a cast of the interior of part 

 of the septate portion of the shell, with sixteen of the chambers 

 preserved, and of a small piece apparently at the commencement 

 of the body chamber. Figure A shows both the arcuate contour 

 of the fossil, and the widely and shallowly concave lobe ot each of 

 the sutures, as viewed laterally. Figure B, on the other hand, 

 shows the lateral compression, the ovate cuneate transverse sec- 

 tion, as seen in an end view of the smaller end of the specimen, 

 the narrow venter, and the apparently eccentric position ot the 

 siphuncle. 



The original description of the species may be slightly and 

 briefly amended, so as to read as follows : 



"Shell widely arcuate, strongly but rather obliquely com- 

 pressed, very narrow on the periphery or venter, much wider but 

 narrowly rounded on the dorsum, the outline of the transverse 

 section being ovate cuneate. and the lateral diameter to the dorso- 

 ventral about as three to five. 



" Septa averaging about six millimetres apart laterally, the 

 sutural lines being shallowly concave on both sides and produced 

 into a narrow pointed saddle on the venter." Test unknown. 

 Shape and position of the siphuncle not very clearly defined in the 

 only specimen collected, though at the smaller end thereof there 

 are indications that it was eccentric ar;d placed a little on the 

 ventral side of the centre, as represented in figure B. 



The shell is "evidently not a true Cyrtoceras, but a probably 

 new generic type, which there is not yet sufficient material to 

 define satisfactorily." 



