The deep boring at Spur . Figure 8. Ammodiscus sp., a, 3755, 3775, 3795, 3820, 4150, 4260,4275, 4300, 4330, 4340, 4360, 4365, 4375, 4400, 4420, 4430, 4450, 4460feet below surface; b, 4275-4280, 4330-4335, 4340-4345, 4360-4365,4365-4370, 4375-4380, 4385-4390 feet; Valvulina bulloides Brady; d,4395-4400 feet; f, 4415-4420, 4405-4410 feet; g, Endothyra bowmaniPhillips, 4340-4345. 4350-4355, 4360-4365, 4365-4370, 4375-4380, 4385-4390, 4405-4410, 4415-4420, 4425-4430, 4445-4450 feet; h, 4380-4385,4385-4390, 4480-4485 feet. X 40. Some more or less disc-shaped or cone-shaped tests with an unevenexter
The deep boring at Spur . Figure 8. Ammodiscus sp., a, 3755, 3775, 3795, 3820, 4150, 4260,4275, 4300, 4330, 4340, 4360, 4365, 4375, 4400, 4420, 4430, 4450, 4460feet below surface; b, 4275-4280, 4330-4335, 4340-4345, 4360-4365,4365-4370, 4375-4380, 4385-4390 feet; Valvulina bulloides Brady; d,4395-4400 feet; f, 4415-4420, 4405-4410 feet; g, Endothyra bowmaniPhillips, 4340-4345. 4350-4355, 4360-4365, 4365-4370, 4375-4380, 4385-4390, 4405-4410, 4415-4420, 4425-4430, 4445-4450 feet; h, 4380-4385,4385-4390, 4480-4485 feet. X 40. Some more or less disc-shaped or cone-shaped tests with an unevenexterior surface showed dim oblique lines indicating boundaries ofsegments arranged somewhat as in Valvulina rudis Brady. Thespecimens seen had the interior more or less filled with an opaquemineral. This species has been noted by Brady from the fusulina-bearing Carboniferous in Iowa. Figure 9: a, b, Figure 9. Valvulina rudis Brady, a, 4465-4470 feet below surface;b, 4475-4480 feet; c, 4475-4480 feet; unknown, d, e, 4385-4390, 4395r4400 feet. X 40. Discs with a central circular area are not rare, varying from 1 to 3mm. in diameter. One had a cross in the central circle like the out-line of the last chambers in Valvulina palaeotrochus. Some of thesediscs are probably detached segments of cylindric forms of variousforaminifera. Figure 10: e, f. 80 Bulletin of the University of Texas
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