292 F. R. Couper Reed — FomU from Girvan. 



as occurriug in the Llandovery rocks, Tvhile a third nnnamed sj^ecies 

 is recorded from the Caradoc. In the list of fossils prepared by- 

 Mrs. Gray from the collection made by her from the Silurian rocks 

 of the Girvan district,^ /. Konigi is recorded from the Llandeilo beds 

 of Balclatchie, /. antiqmis from the Upper Llandovery of Penkill and 

 the Middle Llandovery of Woodland Point, and /. sp. from the Middle 

 Llandovery of I^ewlands. [Nicholson & Etheridge - mentioned only 

 two specimens of Ischadites, one fi'om Balclatchie and the other from 

 Penkill ; both -were referred to under the name /. Konip, but it was 

 remarked that one of them appeared to possess more the characters of 

 /. antiquiis. The first discover}- of /. Konigi in the Girvan area was 

 made by Mr. Robert Gray and was noticed by Professor J. Young ^ in 

 1868, and in 1870 the same author recorded it from Penkill in his 

 "Catalogue of Western Scottish Fossils," p. 13. Dr. Hinde* gives 

 both the localities, Ealclatchie and Penkill, for the occurrence of 

 /. Konigi, but he regards the species /. antiqims as indistinguishable 

 from it. The only other British species mentioned by this author 

 (loo. cit.) is /. Zindstrotni, Hinde. 



The specimens submitted to me by Mrs. Gray comprise portions of 

 four individuals with the external impression of one of them. All 

 come from the Upper Llandovery of Penkill, and are in a poor state 

 of preservation. The slightly concave base is seen in two of them, 

 the smaller specimen measuring only 11 mm. in diameter and the 

 larger one 35 mm. ; the central 5-6 series of summit plates are 

 arranged in fairly definite concentric circles. In another of the 

 specimens the horizontal rays of the spicules number only three, the 

 proximal ray being absent, as Hinde has explained is sometimes 

 the case.^ 



There is only one specimen from Balclatchie which Mrs. Gray has 

 sent me, and this closely agrees with Salter's /. antiquus^ irova the 

 Llandeilo of Garn Arenig, Wales. The four horizontal rays of the 

 spicules are well seen on the narrow transversely rhomboid summit 

 plates, which also seem rather more numerous than in the Penkill 

 examples of /. Konigi. Only the basal portion of the sponge is pre- 

 served, and the central portion seems to have been somewhat elevated 

 into a short obtuse boss ; but the whole organism has been crushed 

 and more or less flattened out, thus increasing the apparent diameter, 

 which measures about 38 mm. 



Receptaculites Grayi, sp. nov. (PI. XII, Pigs. 1, 2.) 

 Amongst the material which Mrs. Gray has recently sent me for 

 determination there are several very fragmentary specimens from the 

 Middle Llandovery of Woodland Point which must be referred to the 

 genus Receptaculites, and they probably represent a new species. 

 They consist of portions of the upper and lower surfaces, but no 



' IMem. Geol. Surv., Siluriau Eocks of Britain, vol. i, Scotland, 1899, i^p. 510, 

 543, 686. 

 - Nicholson & Etheridge: Mon. Silui-. Foss. Girvan, pt. i (187S), p. 20. 

 3 Young : Proc. Nat. Hist. Soc. Glasgow, ser. i, vol. i (1869), p. 197. 

 " Hinde : Quart. Journ. Geol. Soc, vol. xl (1884), p. 835. 

 * Ibid., p. 814, pi. xxxvi, fig. \j. 

 6 Salter: Mem. Geol. Surv., vol. iii (1866), p. 282, fig. 4. 



