98 F. R. Coioper Reed — Trilohites, Haverf or diced. 



The author has seen reasons for removing the Girvan trilohites 

 previously referred to this species into another and new species ; ^ 

 but there is a specimen of a head -shield in Mr. Turnbull's collection 

 from the Slade Beds of Upper Slade which bears a very close 

 resemblance to the foreign form. The carination of the glabella 

 is strong, and the cheeks only extend about half-way up its sides. 

 The frontal spine, the relative proportions and shape of the various 

 parts of the head-shield seem to be absolutely identical with what 

 WQ know of A. rostratiis. A. tumidus, Forbes, has been recorded by 

 Messrs. Marr & Roberts^ from the Sholeshook Limestone of the 

 Haverfordwest district. 



Family OLENIDiE. 



Eemopleueides Salteri, Eeed, var. (PL IV, Fig. 3.) 



Messrs. Marr & Roberts (op. cit., p. 481) recorded Bemopleurides 

 radians, Barr., from the Sholeshook Limestone. 



There are examples of a species of this genus from the Slade Beds 

 of the quarry at Upper Slade which cannot be referred to the same 

 species, as they possess only two pairs of lateral furrows on the 

 glabella, and the latter has a relatively much broader anterior tongue 

 and is finely tuberculated round its posterior lateral margins. In 

 these characters, as well as in its general shape and tuberculated 

 neck-ring with serrated margin, it resembles R. Salteri, var. 

 girvanensis, Reed,^ and though the Slade specimens are too poorly 

 preserved to identify them positively with this variety, yet I have 

 no hesitation in ascribing it to the same species. The true R. radians, 

 Barrande, is quite distinct, as I have verified by comparison with 

 Bohemian examples of it. 



Family PROETID^. 

 Ctphaspis megalops (McCoy). 



This species was recorded b}'^ Messrs. Marr & Roberts* from the 

 Sholeshook Limestone, but Mr. Turnbull has collected a good head- 

 shield from the Slade Beds near St. Martin's Cemetery, Haverfordwest. 



Ctphaspis cf. Harknessi, Reed. 



An imperfect head-shield, but showing the characters of the 

 glabella clearly, was collected by Mr. H. Kynaston (now Director 

 of the Transvaal Geological Survey) from the Slade Beds of West 

 Pelcomb. It is comparable with the species described by the author ' 

 as Cyphaspis (?) Harhiessi from the Keisley Limestone. The length 

 of the glabella is about 8 mm., and its basal width is about the same. 



1 Eeed: Lower Paleozoic Trilobites of the Girvan District (Palajont. Soc), 

 pt. i (1903), p. 18. 



2 Marr & Roberts: Q.J.G.S., vol. xU (1885), p. 481. 



8 Eeed: Lower Palseoz. Trilob. Girvan District, pt. 1 (1903), p. 39, pi. vi, 

 figs. 8-16. 



* Marr & Roberts: Q.J.G.S., voL xli (1885), p. 481. 

 5 Eeed: Q.J.G.S., vol. Hi (1896), p. 435, pL xxi, fig. 2. 



