the Horton-Windsor District, N. S. 171 



"Windsor Martinia zone with the lower part of the Bihuno- 

 phyllum zone is based. 



Zaphrentis minas Dawson is distinctly of the type of 

 Z. enniskilleni Edwards & Haime. In England this 

 group ranges from the upper Tonrnaisien to the upper 

 I) ihuno phyllum zone, but is especially characteristic of 

 the Viseen. 



Lophophyllum avonense n. sp. In Europe, LopJiopliyl- 

 lum attains its. maximum in strata of upper Viseen age, 

 or in beds immediately succeeding, although it is found 

 sparingly in the upper portion of the Tournaisien. 



Tabulipora acadica n. sp. is a dendroid trepostomatous 

 bryozoan that is very abundant near the base of the Ken- 

 netcook limestone. It is characterized by the thinness 

 of the peripheral zooecial walls, which nevertheless show 

 a distinct moniliform structure. Tabulipora is essen- 

 tially a Viseen genus, and T. tenuimuralis Lee from the 

 Eelwell limestone, Lowick (=02!), agrees with the 

 "Windsor species in the tenuity of its walls. 



Avonia spinifercardinata n. sp. is very close to Pro- 

 ductus longispinus Sowerby. 



Chonetes politus, the only Chonetes yet gathered from 

 the Windsor beds, is identical in all respects with 

 McCoy's species from the base of the Lower Limestone 

 series of Scotland. 



Spirifer hisulcatiformis n. sp. is indistinguishable from 

 S. hisidcatus var. oystermouthensis Vaughan from 

 D2-D3 Gower (Dixon 1911). The hisulcatus type of 

 Spirifer occurs rarely in the middle Avonian but has its 

 maximum in the upper Viseen. 



Martinia opertacosta n. sp. This species lacks dental 

 plates and has the shell structure of a true Martinia. 



Phillipsia howi Billings. This species has been corre- 

 lated by Vogdes with P. meramecensis Shumard, on the 

 evidence of pygidia only. Several cranidia, however^ 

 found by the writer, one of which is still attached in a 

 crushed rolled specimen, determine the Windsor species 

 to belong to the gens of P. eichwaldi Fischer, which occurs 

 in the Lower and Upper Limestones of Scotland and at 

 Bolland, Yorkshire. 



Allorisma sulcatiforme n. sp. is perhaps identical with 

 A. sidcatum Fleming from the Redesdale limestone and 

 the Limestone series of Scotland. 



Aviculopecten dissimilis Fleming, from the Limestone 

 series of Scotland and from the Four Laws limestone of 



