44 THE BRACHIOPODA. 



rather flat, larger valve slightly convex. It is covered with a 

 multitude of very fine ribs or striations which run longitudinally. 

 It is broader than long, and distinguished from Rhjncli. 

 senticosa, to which it is nearest allied, by its peculiar shape and 

 lesser convexity. Two specimens of this species have been 

 found in this neighbourhood, one collected by Mr, T. C. Maggs 

 and the other by my father. They are both small, being about 

 6 lines long by 9 lines broad. 



Localities. — Bradford Abbas (Dorset), also Dundry (Somerset), 

 whence the specimen figured without name by Mr. Davidson 

 was obtained. 



46. — Bhynchonella balinensis, Szajnocha. 



1879. Ehynchonella BAirN-ENSis, Szajnocha, Die Brachiopoden — 

 Fauna der Oolithe von Balin bei Krakau, 

 plate vii., figs. 1, 2, 3. 



This species is variable, as is shown by the figures given by 

 Szajnocha, and figure 1 is especially like Hhynch. parvula, E. 

 Desl. Rhyncli. halinensis is, however, distinguished from RJujncli. 

 parvula by a larger number of ribs, greater thickness, and ribs 

 rounded. The mesial fold is also much more raised. Between 

 figure 1, however, and Rhyncli. parvula the differences are much 

 harder to define, although the specimens look quite distinct. 

 Rhynch. parvula is an extremely flat species, while Rhynch. 

 halinensis is generally thick and rounded, as is shown by 

 Szajnocha in figures 2 and 3. The thin form, however, shown 

 in figure 1 has very small ribs with 4 on the mesial fold, which 

 is raised rather more than in Rhynch. parvula, and is much more 

 conspicuous on account of the smallness of the ribs. In this 

 district specimens agreeing with figure 1 are rare, but sj^ecimens 

 agreeing with the thick forms are oftener found. These gener- 

 ally have four ribs on the mesial fold, but some have three only, 

 and I possess one with five. This species occui'S in the Sowerbyi 



