576 MISS MTJXEO 0^ NEW TEEPOSTOMATOIJS [DeC. I912, 



proximal or lower walls of the zooecial tubes (assuming, as seems 

 probable, that the branches were erect) ; most of the diaphragms 

 are curved inwards and even back towards the lower walls; usually 

 they are thickened along the inner margin : they never extend more 

 than a third of the way across the zooecial tubes. 



The divisional line between adjoining zooecia, as seen in section, 

 is rarely well-marked, and the laminated structure of the walls is 

 clearly seen in longitudinal sections. Many, but not all, of the 

 junction-angles are occupied by strong acanthopores ; these in well- 

 preserved specimens appear as blunt spines at the surface. 



Horizon and locality. — Solenopora Sub-zone. Kavenstone- 

 dale. 



Stenopheagma grandyense, sp. nov. 



The genus Stenopliragma is further represented by a single large 

 and well-preserved specimen from Grandy Quarry, near Shap. This 

 specimen, consisting of a hollow cj'lindrical branch, differs cod- 

 spicuously from those constituting the species just described in the 

 absence of acanthopores, the larger size of the zooecia, the much 

 greater thickness of their walls in the mature region, and the circular 

 or oval outlines of the zooecia, as seen in tangential sections. The 

 periodical constrictions of the wall in the peripheral region are much 

 more marked though less numerous ; the diaphragms are somewhat 

 thicker, and gently curved towards the epizoarium throughout 

 their width, tapering slightly at the inner margin. The divisional 

 lines between adjoining zooecia are frequently occupied by a crowded 

 but usually single series of small dark spots, many of which (when 

 magnified) present the appearance of minute tubuli, running parallel 

 with the length of the zooecial tubes. 



In all other characters this specimen is essentially similar to 

 those from Eavenstonedale, and the name Stenopliragma 

 grandy ens e is suggested for its reception. 



Other specimens from Humphrey Head and Great Rundal Beck 

 (Upper DihunophyUum Sub-zone in both localities) appear to be 

 referable to the same species. Unfortunately, the material available 

 is scarce, and the immature region is crushed in parts ; however, 

 all the sections show a close resemblance, both in structure and 

 in dimensions, to St. grandyense. The excellent preservation of 

 one of the specimens from Humphrey Head probably accounts for 

 the fact that it is only in sections of this one that acanthopores 

 can be observed ; they are few in number and irregularly distri- 

 buted, occurring singly at some of the junction-angles which are 

 not occupied by a cluster of dark spots. 



A solitary, but large and well-preserved specimen from Ashfell, 

 near the summit of the Gastropod Beds, will probably necessitate 

 the foundation of an additional new species for its reception. 



This consists of part of a long hollow cylindrical branch having 

 a diameter of 12 mm. The zoarium varies in thickness from 

 2 mm. to 4*5 mm., and is lined by a strong wrinkled epizoarium ; 



