217 



in the later larval stages ; atrypoides, narrow with prominent umbo to 

 the ventral and deep sulcus to the dorsal valve ; and stropkomenoides, 

 with flat, smooth valves and long hinge-line. The two first mentioned forms 

 are from the Peltura fauna (C. 36), and the last from the Parabolina Zone 



(C. 3a). 



MOLLUSCA. 



MODIOLOPSIS (?) cf. M. SOLVENSIS, Hicks. 



Bull. Nat. Hist. Soc. of N. Brunswick, vol. iv., p. 408. 



Long-ovate, elevated toward the umbo and carrying its fullness towards Modiolopsis 



the lower posterior end of the valves. 





 The umbo is near the anterior end, and there is a small, transversely 



elongated scar just in front of it. 



Sculpture. The bad condition of the fossils leaves this doubtful for 

 most of the surface, but there are faint concentric striations toward the 

 lower margin and the posterior end. Only two examples known. 



Size. Length 4J mm. ; width 2^ mm. 



Horizon and locality. In the fine gray shale of Assise C. 3 c 2 at 

 McLeod brook, Boisdale, N.S. 



This species resembles that above cited of Hicks, but lacks the strong 

 ridge extending backward from the umbo. It is also only half of its 

 length. 



BELLEROPHON, Montf. 

 BELLEROPHON INSULT. PI. XVIII, fig. 3. 



Bull. Nat. Hist., Soc., of N. Brunswick, p. 408, pi. xviii, fig. 3. 



A small thin species, having about three whorls, of which the outer is Bellerophon 

 enlarged and more than twice the height of the others ; it is emarginate 

 on the ventral side, and shows no keel ; it has from two to three concen- 

 tric growth ridges in the outer half of the last whorl. 



Sculpture. The outer whorl shows a very fine concentric striation, 

 visible only with a strong lens. 



Size. Height across the whorls, 7 mm. ; width across the shell from 

 the emargination of the aperture at the ventral side, to the dorsum oppo- 

 site, 4 mm. ; width across the aperture from ventral to dorsal, 4 mm. 



Horizon and locality. In the gray shale of Assise C. 3 c 2 at McLeod 

 brook, Boisdale, N.S. 



Dr. Henry Hicks' species (B. Ramsay ensis), which is about the size of 

 this one, may be con-specific with it, but the Welsh specimens are too 



