426 THE GEOLOGIST. 



have in these ancient markings the traces of the burrowed channels 

 of Olenidse, or other small crustaceans. 



Tracks similar to those made by shrimps are fonnd on some of 

 these Lingnla-slabs, and have been ascribed by Mr. Salter to the 

 Hymenocaris. 



In beds of the same age, near Bangor, two species of fucoids, 

 Chondrites acutangulus and Cruziana semvpUcata are recorded ; while 

 in the black schists on the western flanks of the Malvern Hills three 

 other species of Olenns, 0. hwulcatus (Phillips), 0. humilis (Phillips), 

 0. scarabomdes (? of Wahlenberg) are met with. 



Lign. 12 — Olenus bisulcatus. Lign. 13.— O. humims. Lign. 14.— O. scahab^oides. 



* From the figures in " Siliiria," from fragments of specimens from Malvern. 



Lign. 14. — OtENTTS SCAEA- 



B^oiBES (of Wahlenberg). 

 Nat. size. From the figure in 



Angelin's " PalEeontologia 

 Suecica."* 



* Oleinis (Peltura) scarabsBoides, Wahl. nat. size. Angelin, p. 45. 



"Log. Nat. — In stratis regionis A, Vestrogotliice ex. gr. ad Kaflas, Klefra, Carls- 

 fors ; NericicB ad Latorp ; (ElancUo5 ad Algutsrum j Scanice ad Andrarum. In 

 Norvegia ad Opslo. 



" Corpus angustmn, ovato-oblongnin distincte longitudinaliter trilobuin j crusta 

 Issvis vel aciculata. 



" Caput breve, subreniforme, valde convexum, imdique marginatum sulcoqne 

 intramargiaali praeditum ; anguli exteriores rotundati, mutici. 



" Oculi minuti, papillseformes — distincte reticnlati loboque orbitali parvo 

 instnicti, valde approximati, apicales. Sntm-a facialis portice ab ocnlis ad margi- 

 nem baseos anticeque ad marginem apicalem ducta. 



" Frons distincta, lata, ovata, valde convexa, obsolete lobata, marginem apicalem 

 subattingens. Costa facialis utrinqne, obsoleta, brevissima, inter apicem frontis 

 lobnmqne orbitatem ducta. 



" Thorax segmentis 12 longitudinaliter sulcatis, apice acutis ; rachis distincta, 

 convexa, pleuris latior. 



" Abdomen pai-vum, imniargiaatum, margine dentatum, costis lateralibus ob- 

 soletis ; rachisbrevis, crassa, conica, margiriem baud attingens." — Angelin, pars, i., 

 fasc. ii., 1849." 



