LICHAS GRAYI. 167 



Family Pkortid.k. 

 Genus CYPHASPIS, Burmeister. 

 Cyphaspis megalops (M'Coy). 



1904. Cyphaspis megalops, Reed, supra, p. 82. 



The only specimen of this species from the Grirvan area which had previously 

 come under my notice was the one in the Sedgwick Museum from the Mulloch Hill 

 Group of Mulloch Quarry as mentioned on p. 82. But in the recent material 

 collected by Mrs. Gray a nearly complete individual showing the head, thorax, 

 and pygidium has been recognised from the Starfish Bed (Drummnck Group), 

 Thraive Glen, which is a new horizon and locality for this species in the Girvan 

 area. Only the free cheeks in this specimen are missing, and it exhibits all 

 the typical characters. It has been found in the Sholeshook Limestone and 

 Slade Beds of the Haverfordwest district. 1 



Genus MENOCEPHALUS, Owen. 

 Menoeephalus ? (Tornquistia) cf. nicholsoni, Reed. 



1904. Mcnocephahts {T'Ornqvistia) cf. nicholsoni, Reed, supra, \>. 86, pi. xii, figs. 3 — 7. 



This species has only been previously identified from the Balclatchie Beds, but 

 I have detected one indubitable (though somewhat flattened) head-shield showing 

 the usual characters in the Middle Bala of Whitehouse Bay. The true generic 

 position and affinities of this species are as obscure as ever. 



Family Lichadid.e. 



Genus LICHAS, Dalman. 



Lichas (Platylichas) grayi, Fletcher, var. ind. Plate XX, fig. 12. 



One well-preserved head-shield without the free cheeks deserves notice, a.-- ii 

 differs from typical examples of L. grayi, var. scoticus {supra, p. 100), by possessing 

 1 Reed, 'Geo!. Mag." [5], vol. ii (1905), p. 98. 



