426 
THE GEOLOGIST. 
have in these ancient markings the traces of the burrowed channels 
of OlenidfB, or other small crustaceans. 
Tracks similar to those made by shrimps are found on some of 
these Lingula-slabs, and have been ascribed by Mr. Salter to the 
Hymenocaris. 
In beds of the same age, near Bangor, two species of fucoids, 
Cliondrites acutanguhis and Gruziana semiplicata are recorded ; while 
in the black schists on the western flanks of the Malvern Hills tlrree 
other species of Olenus, 0. hisulcatus (Plulhps), 0. hmnilis (Phillips), 
0. scarabcBoides (? of Wahlenberg) are met with. 
Lign. 12.— Olbncs bisotcatus. Lign. 13.— O. HtrsnLis. tAga. 14.— O. scababsoissb. 
From the figures in " Siluria," from fragments of specimens from Malvern. 
Lign. 14. — OtEWirs scaba- 
BaioiDEB (of Wahlenberg). 
Nat. size. From the figure in 
Angclin's " Falseontologia 
Suecica."* 
* Olenns (Peltura) scarabaooides, Wahl. nafc. size. Angelin, p. 45. 
"Loc. Nat. — In stratis regionis A, Vestrogothia ex. gr. ad Kaflas, Klefra, Carls- 
fors ; Nericice ad Latorp ; (ElamUoe ad Algutsram ; Sccmice ad Andrarum. In 
Norvegia ad Opslo. 
" Corpus angustum, ovato-oblongum distincte longitudinaliter trilobum ; crusta 
la3vis vel aciculata. 
" Caput breve, subreniforme, valde convenun, trndique marginatTim sulcoque 
intramarginaU praeditum ; anguli exteriores rotundati, mutici. 
" Oculi minuti, papiUsefonnes — distincte reticulati loboque orbitali parvo 
instructi, valde approximati, apicales. Sntura facialis portice ab oculis ad margi- 
nem baseos anticeque ad marginem apicalem ducta. 
" Frons dietiacta, lata, ovata, valde convexa, obsolete lobata, marginem apicalem 
subattingens. Costa facialis utrinque, obsoleta, brevissima, inter apicem frontis 
lobumque orbitatem ducta. 
" Thorax segmentis 12 longitudinaliter sulcatis, apice acutis ; rachis distincta, 
convexa, pleuris latior. 
" Abdomen parvnm, immarginatum, margino dentatum, costis lateraUbns ob- 
soletis ; rachisbrevis, crassa, conica, marginem baud attingens." — AngeUn, pars, i., 
faec. ii., 1849." 
