232 



ANGELINA ? sp. ? PL xvm, fig. 9. 

 Bull. Nat. Hist. Soc. of N. Bruns'k., vol. iv, p. 413, pi. xvni, fig. 9. 



A young While we have no adult of this genus from the Tremadoc of Cape 



Breton, there is a young larval shield which seems to agree reasonably 

 well with the characters of this genus by its suture and general outline. 

 Only the head shield has been preserved. This is narrow, as are all its 

 parts. The eyelobes are curved and linear, starting from near the front 

 of the glabella in a heavy ocular fillet, the eyelobes are placed about the 

 middle of the cheek. The movable cheeks have extended spines, and are 

 cut off in front by the curving suture. The glabella is ridged along the 

 middle, and has traces of three pairs of faintly marked furrows. The 

 occipital ring is narrow and weak. 



Sculpture. The surface appears smooth. 



Size. Length of this larval headshield, 5 mm. (or to the end of the 

 spines 8 mm.); width, 7 mm. 



Horizon and locality. Gray shale of Assise C 3 c 2 at McLeod brook, 

 Escasonie, N. S. 



ASAPHELLUS Callaway. 

 ASAPHELLTJS HoMPRAYi, var. PL XVIII, figs. lOa-e. 



cf. Asaphus Homfrayi, Salt., Mem. Geol. Surv. G.B., vol. iii, p. 311 

 pi. viii, figs. 11-14, 1866. 



Bull. Nat. Hist. Soc. of New Brunswick, vol. iv., p. 413, pi. xviii., figs. 10a-e. 



Salter's description of Asaphellus Homfrayi is as follows : 



"Asaphus (Isotelus) long-oval, gently convex, having the head sub- 

 angulate in front, and having short [genal] spines. Facial suture within 

 the margin. Eyes submedian [near the mid-length of the shield], small. 

 Pygidial axis long, somewhat prominent at the apex. It is three inches 

 long and one and a half broad." 



The addition to this description in Salter's trilobites is as follows : 

 Description of " The head is more than a third of the whole length, and longer than 

 the thorax, which in its turn, is longer* than the caudal shield. The 

 head is semi-oval, rather pointed in front, and has very short posterior 

 spines ; it is broadly depressed around the margin. The glabellar por- 

 tion is scarcely marked out ; the eyes are placed nearly half-way up the 

 head ; they are small (two lines long), the facial sutures curving out 

 boldly beneath them, and cutting the posterior margin more than half 

 way out from the axis. 



Above the eye they form a narrow ogive, and nearly follow the front 

 margin. On the underside of the head the vertical furrow on the epis- 



*The italics are inserted to mark the points of difference from the Canadian variety. 



Asaphellus 

 Homfrayi, 

 var. 



