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bulletin: museum of comparative zoology. 



The most closely allied species is probably C. muUibrachiatus 

 (Raymond) .1 The type of that species has eight rays, though Dr. 

 Raymond suggests that the normal number may prove to be seven. 

 In the Canadian species, however, the periphery is still broader than 

 in C. raymondi, the width being equal to one third of the diameter. 



Bryozoa. 



Prasopora simulatrix var. occidentalis Ulrich. 



Prasopora simulatrix var. occidentalis Ulrich, Pal. Minn., 1893, 3 p. 246 pi 

 16, fig. 1, 2, 6, 7. 



• 



This species, and possibly others of like form, is extremely abundant 

 from 160 to 280 feet above the base of the Trenton. It also occurs 

 practically throughout the lower part of the Trenton. I do not wish 

 to give the impression that all the hemispheric Bryozoa collected at 

 Martinsburg belong to this species. Such is probably not the case. 

 But from the scores of specimens collected, I examined sections of six 

 taken at random. All of these proved to be Prasopora simulatrix 

 var. • occidentalis. While other genera may be represented in the 

 many unexamined forms, the probability is that few, if any, do not 

 belong to Prasopora. 



ESCHAROPORA CONFLUENS Ulrich. 

 Escharopora confluens Ulrich, Pal. Minn., 1893, 3, p. 171, pi. 13, fig. 1-11. 



I found this bryozoan very abundant in the basal beds. It occurs 

 mostly as inch-long fragments not showing the mode of growth, but 

 by removing a large slab of limestone from the bed of the creek, I 

 imcovered some large branching specimens embedded in the soft 

 shaly parting. One specimen was found to branch three times in a 

 length of two inches. 



Brachiopoda. 



PSEUDOLINGULA RECTILATERALIS (Emmons). 

 Lingula rectilateralis Emmons, Geol. N. Y. Rept. 2d dist., 1842, p. 399, fig. 6. 



This species occurred in Upper, Middle, and Lower Trenton. At 

 horizon 180 I found a specimen protruding downwards from an over- 



J Ottawa naturalist, 24, p. 60, pi. 1, fig. 2. 



