8 



nearly to the centre. (Figs. 2, 2a, 25.) One specimen has a diameter 

 of eighteen lines and another sixteen lines. 



A third specimen is only twelve lines in diameter, with the same cha- 

 racters as the last two. 



The materials are not sufficient to enable us to decide positively whether 

 they all belong to the same species or not. Should there be more than 

 one species, the specific name above given ought to be retained for the 

 larger form first above described. 



Locality and Formation.—ln^idJi Cove,'Gaspe, in the Gaspe Hmestone, 

 No. 8. 



Collector.— Bell. 



Zaphrentis rugatula. (N. sp.) 



" Undetermined species of Zaphrentis,'' Geol. Can., p. 391. 

 PL 1, fig. 3, 3a. 



Description, — Corallum small, slender, straight, or only slightly curved, 

 gradually increasing to a width of about one inch in a length of two or 

 three inches. Surface with several engirdling undulations of growth, 

 which are sometimes six or eight lines wide ; when perfect, strongly 

 marked with rounded longitudinal septal ridges, of which there are four 

 or five in a width of two lines. These ridges are generally more or less 

 undulated and irregular, giving to the surface a somewhat rugose aspect. 

 This appearance is also in part due to the encircling strise, which are 

 very distinct, and sometimes exhibit a tendency to imbrication. There are 

 five or six of these striae in one line. 



A longitudinal section through a larger individual (fig. oa) shows, 

 that in this species the cup is of great depth, in proportion to the size of 

 the coral. All the dark-shaded space in the upper part of fig. 

 represents the cavity of the cup (filled with dark grey limestone) but not 

 the whole of it, as it is evident that a portion of the margin is broken 

 away. Close to the curved side of the fi(;ure, it will be observed that a 

 portion of the dark shade extends downwards to a sharp point, close to 

 the outer wall. This may indicate the place of the septal fossette. All 

 below the dark shade, in the figure, is composed of reddish white crystaUine 

 limestone which, although finely polished, does not exhibit any certain 

 evidence of transverse diaphragms. The septa are obscurely seen extend- 

 ing to the centre. 



In another specimen, slit longitudinally and polished, the cup is seen to 

 be fourteen fines in depth, although the length of the entire individual 

 appears to have been not more than thirty lines. The septa, as seen 



