130 TRILOBITES OF GIRYAN. 



for the omission of the synonymy of the species since Loveu's paper was published 

 is, because I have grave doubts which of the many types of Cybele commonly re- 

 ferred to it by subsequent authors and figured under this name can be considered 

 as truly specifically identical. At any rate there are no other specimens from 

 Girvan which can be probably attributed to it. 

 Dimensions. — 

 Length of glabella . . . . 6*0 mm. 



Width of „ in front ... 4-5 „ 



,, ,, at base . . . 3'0 ,, 



Collection. — Museum of Practical Geology. 

 Horizon and Locality. — Stinchar Limestone Group (Llandeilo) : Craighead. 



5. Cybele, sp. ind. (a). Plate XVII, fig. 5. 



1879. Cheirurus? sp. ind. b, Nicholson and Etheridge, Mem. Silur. Foss. Girvan, fasc. ii, p. 203, 

 pi. xiv, fig. 12. 



Bemads. — The specimen from Balclatchie which Nicholson and Etheridge 

 figured and described as the head-shield of ' Cheirurus ? sp. ind. ?>,' shows the 

 essential characters of a ( hjbele ; but to what described species it should be referred 

 is uncertain, and it is probably new. The figure does not represent the fixed 

 cheeks accurately, for they are much flatter, and the anterior edge is hidden by the 

 matrix ; the irregular lines on the surface are cracks due to slight crushing, but 

 there is present a natural close pitting, while a straight, rounded, ocular ridge 

 may be observed to run rather obliquely backwards from the first lateral furrow of 

 the glabella to the eye, bearing two large remote tubercles upon it. A similar 

 tubercle lies in the middle of the cheek behind the ocular ridge. The pre-glabellar 

 triangular prominence on the front border resembles that in C. loveni var. 

 girvanenns and appears to be an enlargement of that seen in C. bellatula. In the 

 general characters of the glabella and cheeks this specimen is allied to C. coronata, 

 Nieszk., and to C. rev, Schmidt, 1 as well as to C. bellatula, Dalman. 



Collection. — Mrs. Gray (f. M.). 



Horizon and Locality. — Balclatchie Group (Llandeilo) : Balclatchie. 



6. Cybele, sp. ind. (6). Plate XVII, figs. 6—8. 



Remarks. — The Llandeilo beds at Dow Hill have furnished a number of more 

 or less imperfect head-shields and pygidia, which from point of size should appa- 

 rently be associated together, and are not referable to any described species. In 

 1 Schmidt, 'Rev. Ostbalt. Silur. Trilob.,' pt. ii, pp. 209 and 213, pi. xiii, figs. 21—27. 



