206 SUPPLEMENT TO THE 



135. LiNGULA Philipi, Dav. Sil. Sup., PI. XVII, fig. 5. 



Shell small, sub-quadrate, sides almost parallel, front rounded, beak obtusely 

 acuminated ; valves convex and slightly depressed along the middle ; surface smooth, 

 marked with a few concentric lines of growth. 

 Length 5, width 4 lines. 



Ohs. — This small shell was found by Mr. R. Philip in shales forming the highest 

 portion of the Upper Llandovery at Minsterley, Salop. It differs from other Upper- 

 Silurian species of the genus by its shape, and the comparatively great convexity of its 

 valves. 



I have named the fossil after Mr. R. Philip, who has afforded me much information 

 with respect to the geology and palsfcontology of the Minsterley district. 



136, LiNGULA ATTENUATA, Sow. Dav., Sil. Mou., PI. Ill, figs. IS— 27i and Sil. Sup., 



PI. XVII, figs. 13—19. 



Since describing this species at p. 44 of my ' Silurian Monograph,' a very large 

 number of specimens of the shell from different localities have passed through my 

 hands. It is an exceedingly abundant fossil in the Llandeilo at Ardmillan Brae and 

 Balcletchie, in the Girvan district of Ayrshire, and has been collected also by the 

 Geological Survey of Scotland in a rock of a similar age, situated three miles south 

 of Broughton, in Peebleshire. It has also been found in abundance by Mr. E.. Philip 

 in the Upper Llandeilo at Meadow Town, Minsterley. The Rev. P. B. Brodie has 

 procured the fossil from the Lower Caradoc of Horderley, Salop ; and Mrs. R. Gray 

 has found some in the upper zones of the same formation at Drummuck, in Ayrshire. 



137. LiNGULA Ramsayi, Salter. Dav., Sil. Mon., PI. Ill, figs. 49—52; and Sil. Sup., 



PI. XVTI, figs. 6—11. 



" A large pentagonal species," Salter. 



This has been found by Mrs. R. Gray to occur in the Llandeilo at Craighead, 

 Balcletchie, and ]\Iinuntion, in the Girvan District, Ayrshire, in company with Lin- 

 gula attenuata. Though the larger number of specimens are decorticated or have lost 

 their outer finely sculptured surface, yet this may be seen here and there on well- 

 preserved examples. L. Mamsayi varies a good deal in shape, and is rarely met with in 



