The deep boring at Spur . 0, 4465^4470, 4475-4480, 4485-4490• e 4405-4410 4425144^04445-4450 feet; f, 4395-4400, , 4415-1420 4425-443oieetg, 4480-4485 feet; h, 4415-4420, 4425-4430, feet X 40 Flat spirally-coiled tubes of chitinous material were noted at from4150 feet to the bottom of the well. These resemble the genusAmmodiscus. In the diameter of the tube they differ considerably,and also m the number of coils. In some the inner whorls are ofabout the same diameter as the outer, and at the center is usuallyseen a chamber, which often has a wider diameter than the the inn
The deep boring at Spur . 0, 4465^4470, 4475-4480, 4485-4490• e 4405-4410 4425144^04445-4450 feet; f, 4395-4400, , 4415-1420 4425-443oieetg, 4480-4485 feet; h, 4415-4420, 4425-4430, feet X 40 Flat spirally-coiled tubes of chitinous material were noted at from4150 feet to the bottom of the well. These resemble the genusAmmodiscus. In the diameter of the tube they differ considerably,and also m the number of coils. In some the inner whorls are ofabout the same diameter as the outer, and at the center is usuallyseen a chamber, which often has a wider diameter than the the inner whorls are very small no such chamber is seen The Deep Boring at Spur 79 The discs range from to mm. in diameter. Figure 8: a, b, tests were noted which had an exterior resemblance toValvulina bulloides as figured by Brady. These consisted of one:arge segment having one or several smaller segments attached onone side. It is quite probable that they are irregular forms ofEndothyra. Figure 8: d, e, 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, c.
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Keywords: ., bookauth, bookcentury1900, bookdecade1910, bookidcu31924004622084
