. Bulletin - United States National Museum. Science. Fig. 55.—Balands crenatcs curviscutuai. cirrus iii, specimen from station 3232. c, maxilla. d, mandible of the type. a, FIFTH SEGMRxT of OUTER RAMUS OF 6, MEDIAN SEGMENT OP CIRRUS VI, TYPE. The shape of the plain, uncalloused scuta, the narrow spur of the terga, the thin, weak walls, and the maxilhie are all characteristic. The characters vary in different colonies, about as much as in B. crenatus^ and in the limits of this work it is impossible fully to dis- cuss or illustrate the local variations. Two of the forms may be noticed. Specimens
. Bulletin - United States National Museum. Science. Fig. 55.—Balands crenatcs curviscutuai. cirrus iii, specimen from station 3232. c, maxilla. d, mandible of the type. a, FIFTH SEGMRxT of OUTER RAMUS OF 6, MEDIAN SEGMENT OP CIRRUS VI, TYPE. The shape of the plain, uncalloused scuta, the narrow spur of the terga, the thin, weak walls, and the maxilhie are all characteristic. The characters vary in different colonies, about as much as in B. crenatus^ and in the limits of this work it is impossible fully to dis- cuss or illustrate the local variations. Two of the forms may be noticed. Specimens from Unalaska (pi. 41, figs. 1, 4) are typical in ex- ternal form, but the tergum has a much longer carinal margin than in the type lot. Numerous specimens (Cat. No. 32948, ) from Albatross station 3232, Bristol Bay, 10^ fathoms, have a remarkable resem- blance to B. halanoides. The opercular valves and general form are shown in plate 42, figures 2-2^. They grew in crowded groups which are very fragile, the compartments parting readily, so that it is hard to handle them without breaking. The summits are deeply toothed, the form tubular or club-shaj)ed; parietes having thin- walled tubes, as in similarly shaped Atlantic forms of B. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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