A CARBONIFEROUS FAUNA FROM NOWAJA SEMLJA. 161 



distributed, ten of which occupy the space of one rib. No pitting is evident. There are 

 no dental plates. 



This species might be compared with Martinia rhomboidalis M'Coy [non Girty, 

 1908],* in common with which it has steeply falling sides, a linguiform sulcus, and 

 obsolete ribbing. Its elongate shape, flatter ribs, and characteristic longitudinal striae 

 distinguish it from M'Coy's species, which is also appreciably smaller. 



The peculiar striae so conspicuous here have been described in many species of 

 Spiriferids from various horizons, and cannot be said to be distinctive of any particular 

 group, f 



Genus Reticularia M'Coy. 

 ? Reticularia imbricata (J. Sowerby). 



A small and incomplete specimen has the ornamentation characteristic of this species, 

 but, as I have been unable to see its internal characters, its true position must remain 

 doubtful. 



Genus Squamularia Gemmelaro. 

 Squamularia sp. a. (PL I. figs. 18-186.) 



The collection contains a small Spiriferid, the general outline and ornamentation of 

 which would determine its reference to Reticularia lineata, were it not that it lacks all 

 traces of the septum and dental plates characteristic of the genus Reticularia, as defined 

 by M'Coy. Ten specimens in different stages of growth up to 12 mm. were examined, 

 and all are remarkable for their extremely small and indefinite area. 



The dimensions of the specimen figured are : — 



Length ..... 10 mm. 

 Width . . . . . 10 „ 



Depth . . . . 3.5 „ 



Squamularia sp. b. (PL I., figs. 19-196.) 



A few examples of a Squamularia differ from specimens of the same size belonging 

 to sp. a in having a well-defined area and a more robust articulating process. Their 

 ornamentation is the same as that in sp. a. The dimensions of the specimen figured 

 are : — 



Length ..... 6 mm. 



Width . . . . 6 „ 



Depth . . . . . 3-5 ,, 



* M'Coy, Synopsis Garb. Limestone Fossils of Ireland, 1844, pi. xxii. fig. 11. 



t Good figures of this surface structure are given in Palseontology cf New York, vol. viii. (passim), and in Professor 

 Tschernyschew's Obercarbonischen Brachiopoden (passim). 



