Table 1.

Contextual and descriptive data on N. gibbosulus shells from the Middle Paleolithic layers of the Grotte des Pigeons (Taforalt)

Fig. 3 no.	Layer	Square	Inv. no.	Context	Length, mm	Width, mm	PST
1	18	L13	157	In situ	16.92	11.99	5.99
2	19	M13	5,348	In situ	NA	10.30	3.84
3	21	L13	278	In situ	NA	11.13	3.94
4	21	L14	1,965	In situ	14.47	10.72	4.27
5	21	L15	1,964	In situ	NA	10.73	4.57
6	21	M13	2,087	In situ	NA	10.85	5.33
7	21	M14	2,022	In situ	NA	11.80	4.38
8	21	M14	5,406	In situ	17.41	13.91	5.77
9	21	M17	2,047	In situ	15.35	11.48	4.28
10	Beneath 21	N13	3,367	Burrow	16.28	11.49	4.60
11	Beneath 21	N13	3,368	Burrow	15.85	11.75	4.12
12	Group E	P13	3,720	Burrow	NA	12.69	5.39
13	Group E	NA	5,305	Sieving	NA	13.30	5.15

NA, not applicable; Inv., inventory; PST, parietal shield thickness.