2 2 Bulletin 15 333 



Modiola N^ysti Kickx. Pe£lu7icitlus pulvinatus Lam. 



" Saiidbergeri Bosq. Fusus elongatus Nyst. 



Pleiirotomci aciiticosta Nyst. Cancellaria evulsa Sol. 



" Selysii De Kon. Natica labellata Lam. 



Sands of Neerrepen and Grimmer ting en. Although the 

 sands of Neerrepen are exposed in a number of places, the only 

 locality where fossils could be well obtained has been enclosed for 

 more than 40 years in a private park in which colledling is for- 

 bidden. The sands are characterized b}^ traces of annelids and 

 valves of Ostrea ventilabrum. The deposit is littoral. Cross- 

 bedding is frequent. The fauna is much the same as that of 

 Grimniertingen, a hamlet 7 kilometers north of Tongres. At the 

 base of the sands of Grimmertingen Rostellaria, Ostrea, PeBen, 

 Area, Cardita, PeHiaicuhcs, Cardium, etc., have been found; and 

 in the upper la3'ers, Serpula, Murex, Fusus, Buccinum, Turritella, 

 Natica, etc. The utmost patience and care were neccessary in 

 obtaining these specimens which were very fragile. For many 

 years the supply of fossils at Grimmertingen has been exhausted, 

 but all the species colledled there and at Neerrepen are on exhibi- 

 tion at the Royal Museum in Brussels. 



The lower Tongrian ends with the green clays, but this limit 

 is for convenience only, and is not based on any marked break in 

 the series. 



Sands of Bautersem. The sands of Bautersem are usually 

 very fine, snow-white or light green in color, and not micaceous. 

 They contain no traces of annelids. Cerithitim, Cyrena and 

 LimncEa occur near the base. 



Of the 32 species found in these sands the commoner are 

 Cyrena semistriata, Cerithium Lamarcki, Ostrea ventilabrum, 

 PeSlunculus lunulatiis, Luciyia Heberti, Astarte trigonella Nyst, 

 Lucina Omaliusi Desh., Cytherea incrassata J. Sow., Psarnmobia 

 stampinensis Desh. and fruits of Chara associated with Limncsa 

 longiscata. 



The charadteristic species are 

 Cerithium intradentatum Desh. Planorbis acuticarinatus Dunk. 

 Limncea longiscata Brongn. Melania muricata E. Wood. 



