PLATE CXVIa. 
CORNULITES SERPDLARIUS. 
Page 21. 
Fig. 1. (= f. 5, Sow., loc. cit.)* A [Brachiopod (Athyris?) having two young individuals of the fossil 
attached to its surface thi'oughout their entire length. 
Fig. 2. (= f. 5a, Sow., loe. cit.) A group of three individuals in the young state, attached for their entire 
length to the shell of a Brachiopod ? 
Fig. 3. (= f. 6, Sow., loc. cit.) A group of two adnascent individuals in an advanced stage of growth, show¬ 
ing them to be composed of successive rings, as described in the text. The surface has been cut 
or worn so as to expose the interior cavity. 
Fig. 4. (= f. 7, Sow., loc. cit.) The distal or fi-ee portion of a tube, the ujiper portion of which is dis¬ 
tinctly striated, while the test has been partially removed, showing the interioi- rings or cups; 
the cast of the inteinor. 
Fig. 5. (f. = 8, Sow., Zoc. c#.) A more mature example, preserving the curved initial extremity. The 
test has been partially removed by weathering or maceration. 
Fig. 6. (f. = [8], Sow., loc. cit.) A larger individual, in a similar condition to the preceding, wanting the 
the initial extremity. 
Fig. 7. (f. =8, Sow., loc. cit.) A longitudinal section of a tube, showing, on the inner side, the project¬ 
ing edges of the successive rings, and the incipient and developed tissue of the walls. 
Fig. 8. (f. = 9, Sow., loc. cit.) A portion of a mature tube partially exfoliated, showing the vesicular 
structure on the light side, with the external striated test upon the uppei- left-hand side. 
CORNULITES ARCUATUS. 
Page 19. 
Fig. 9. Coi-nulites arcuatus, Conrad. Jour. Acad. Nat. Sci., vol. viii, j)- 276, [pi. xvii, fig. 8. 1842. (A 
copy of Mr. Conrad’s figure.) 
Near Albion (Wayne county, in error), N. Y. 
From the Niagara limestone. 
CORNULITES ClINTONI. 
Page 18. 
Corrected from C. Jlexuosus ( Pal. N. Y., vol. ii, p. 98) in Twenty-eighth Eept. N. Y. 
State Mus. Nat. Hist., p. 184. 1879. 
Fig. 10. (Fig. 12a, vol. ii, loc. cit.) A mature example, preserving the initial point, and the test, which has 
been somewhat macerated. 
Fig. 11. (Fig. 12c, vol. ii, loc. cit.) A cast of the interior of a large individual, where the initial point is 
wanting. 
CORNULITES BELLASTHIATUS, 11. Sp. 
Page 20. 
Cornulites -, Pal. N. Y., vol. ii, p. 353, pi. Ixxxv, figs. 15 and 16. 
Fig. 12. An adult specimen, imperfect towai-d the base, preserving the test and showing the ti-ansverse 
and longitudinal strise with obsolescent annulations. 
Fig. 13. An adult, nearly entire individual, preserving the striated test with distinct annulations. The 
specimen is compressed toward the outer extremity. 
* The figures are reversed from the position given by Mr. Sowei-by, in order to have them conform to the 
illustrations on plates cxv and cxvi, and in accordance with their natural position or mode of growth from 
the narrow apex to the aperture. 
