Palaeontology. — "Contrlhilions to our Knomli'i/j/e of the Palae- 

 ontoloyij of the Nether/niu/s. 1. Otoliths of I'e/i'ostfi from, the 

 OUgocene and the Miocene of the Peel-district (md of Winters- 

 wijk." By O. Posthumus. (Coiiimiinicated by Prof. J. C. Sohou'I'k). 



(Cominniiicaled at the meeting of I'Vbiuary 24, 19'23). 



As feganis the fi.sh-faiina of (he terliarj- (ie|)Osits in tlie Nellier- 

 laiids the occiiri-eiife lias been i'e|)orted of a iiuiuber of Selacliii in 

 tlie Oiigoceiie of Soiitli-Liiiiburg '), and of liie Miocene of East-Geldei- 

 land^) and Overijssel'). No remains had as yet been fonnd of Teleostei. 



We aie in a position to form an idea of tlie fisli-fanna in the 

 Noith Sea of Miocene time, from a number of otoliÜis occtiiTing in 

 material obtained from borings, undertaken by the Government 

 (Institute tV)r the Geol. Exploration of the Netherlands) on the Southern 

 Peelhuist, notalilj from boiing 20 (Helden) of the Middle-Miocene 

 (75.4 — 80.4 m.), from boring 21 (Swalmen) of the U|)per-Üligocene 

 (100—160 ra.), and of the Middle-Miocene (75—100 m.); likewise 

 in material originating from boring 22 (Liessel) also of Middle- 

 Miocene date (100—190 m.). 



Moreover the test-boring U near Winterswijk, placed at my 

 disposition some otoliths from the Septarian clay, and from the Middle- 

 Miocene, laid bare in the bed of Slingerbeek near Winterswijk. 



The following specimens have been found''): 



OUgocene. 

 Middle-Oligocene (Septaria clay), Winterswijk. 



Otolithus (Scopelus) pnlcher, Prochazka. 



1) W. C. H. Staring De bodem van Nederland, 2e deel, Haarlem, 1860, p. 282. 



2) Ibid, p. 209, 210. 



»| T. C. WiNKLKR. Catalogue systématique du Musée Teyler, 6me livr. 1867, 

 p. 624. 



*) Tliey will before long be figured and described in a more detailed memoir. 



