THE INDIGENOUS FAUNA. 21 



clustered together in places that, being overcrowded, they inter- 

 fered with each other's proper growth and produced abnormal 

 distortions 1 . Brickhill was the metropolis of the Brachiopoda, in 

 Cretaceous times; but still, although the species are so numerous 

 (35 in all), the genera are few, namely, only Terebratula, Waldhei- 

 mia, Terebratella, Kingena (1 sp.), Terebratulina (1 sp.), and 

 Rhynchonella. Amongst these the Waldheimia Woodwardi and W. 

 pseudojurensis, and the species of Terebratella are the most note- 

 worthy as remarkable and characteristic types. Of the Terebra- 

 tellce only two species T. Meyeri n. sp. and T. Davidsoni are common 

 at Upware; no well-marked representative of the other species 

 having to my knowledge occurred in that neighbourhood. Tere- 

 bratula capillata is remarkable on account of its limited and curious 

 distribution, being only known in these Neocomians, the Red chalk, 

 and the Tourtia of Belgium. Terebratula Upwarensis, T. microtrema, 

 T.prwlonga, T.depressa and T.Montoniana were extremely abundant, 

 but T. Meyeri, Lankesteri and Dallasii are rare. At Brickhill the 

 Brachiopods occurred in the richest profusion, and a noble series of 

 them may be studied in the Woodwardian Museum. The near 

 relationship of the Brickhill species to the Upware group is incon- 

 testable, all the Upware species except Waldheimia Woodwardi, 

 Terabratella Meyeri and T. capillata having been found here also. 

 The most noteworthy points of difference are the much greater 

 development of the Terebratula? at Brickhill {T.Keepingi isunknown 

 elsewhere), the presence of Kingena rhornboidea and Terebratulina 

 striata, and the absence of the species aforementioned. It may be 

 observed that these Brickhill species, absent from Upware, are 

 more southern forms, known at Farringdon, or in the Wealden area 

 at Godalming and Hythe. The tables of distribution are, in the case 

 of the Brachiopoda, built up almost entirely from the authority of 

 Mr Davidson, and Mr Walker, Mr Meyer and M. Barrois, or from 

 my own comparisons ; for the continental records are in such con- 

 fusion as to be quite untrustworthy. 



1 Mr Walker possesses a specimen of T. Meyeri in which the irritation pro- 

 duced by the working of a boring shell has caused a pearl to be formed in its 

 interior. 



