286 Earhness — Fossils of the Upper Llandovery. 



G. Lyell refers to tlie presence of wings of Blatta and Acridites in 

 the coal in Westphalia, and to a still larger series of insect remains 

 in the ironstone near Treves, among which are several Blattidce, Neu- 

 roptera, Termites, one Scarahceus, and the wing of a large Gryllus 

 which he figures under the name of " Gryllacris litJiantliracce " 

 (Manual of Geology, sixth edition). The presence of spiders and 

 scorpions, and the state of preservation of the oldest known fossil 

 spider from the coal in Upper Silesia, is worthy of note. This 

 specimen is remarkably perfect, and is embedded in a white kind of 

 shale, and the body stands out in relief on the surface, showing the 

 four pairs of legs, the two palpi, and even the coriaceous integument 

 of the body (see Geol. Mag. 1865, Vol. II. p. 468). 



I was glad to have an opportunity of examining this rare and 

 interesting fossil when exhibited by the fortunate possessor, Professor 

 Eomer, at the meeting of the British Association in Birmingham, in 

 1865. Hitherto I have looked in vain for them in the series ; but 

 some day they will very likely be discovered, for we can hardly 

 believe that such a number and variety of insects inhabited the land 

 during the Liassic epoch, were not preyed upon by spiders and other 

 creatures (Insectivorous mammals ?) associated with them. 



P. B. Bkodie. 



ViCABAGE, EOWINGTON, WARWICK, 



April 7th, 1866. 



DIPIOGMAPSUS TERETIUSCULUS IN THE UPPER LLANDOVERY OF 



HAVERFORDWEST. 



To the Editor of ihe Geological Magazine. 



Sir, — A short time ago Mr. Lightbody and I, when on our way 

 to St. David's to look at the old rocks there, availed ourselves of the 

 opportunity of examining the two celebrated fossil localities near 

 Haverfordwest, Sholes' Hook, and the Gas-works cutting. 



In the latter we met with a fossil very much about the position 

 which has hitherto been assigned it. The strata at the Gas-works 

 have generally been regarded as Upper Llandovery ; and in them 

 we found the following fossils, — Nidulites favus, Petraia subduplicata 

 var. crenulata, very abundant ; Stenopora fibrosa, Tentaculites Anglicus, 

 Ortliis hiforatus, 0. calligramma, var. Walsalliensis, Stropliomena anii- 

 guata, S.pecten, S. expansa, Leptcena sericea, and MurcJiisonia gyrogonia. 

 This is an association quite common. But along with these occurs 

 Diplograpsus teretiusculus, a form hitherto unknown higher than the 

 Upper Llandeilo ; and of which Mr. Salter says, ''is a characteristic 

 Llandeilo species never falling, as I believe, below or rising above that 

 formation" (Appendix to Memoirs of Geol. Survey, vol. iii. page 330). 



Double graptolites have also been met with in the Lake country, 

 in the Coniston flags of Broughton Moor strata, which are probably 

 near the horizon of those of the Haverfordwest Gas-works. I am 

 not, however, aware that D. teretiusculus has been found here ; care- 

 ful looking may very probably discover it. 



Yours truly, Kobert Harkness. 



Queen's College, Cork., 

 dthMaij, 1867. 



