. Bulletin - United States National Museum. Science. THE SESSILE BAEISTACLES. 167 not at all denticulated. The alse have oblique summits; their sutural edges are rather thick and distinctly crenated. Basis flat, calcareous, very thin, with the surface slightly marked by radiating furrows, which furrows answer to the radiating pores that occur in the bases of most Fig. 4J>.—Balands cuenatus, Inglefield Gulf, Greenland, a, labrum. C, MANDIBLE. 6, MAXILLA. According to Darwin: INIouth: Labrum with sis teeth. Mandibles with the fourth tooth minute or rudimentary, and the fifth general
. Bulletin - United States National Museum. Science. THE SESSILE BAEISTACLES. 167 not at all denticulated. The alse have oblique summits; their sutural edges are rather thick and distinctly crenated. Basis flat, calcareous, very thin, with the surface slightly marked by radiating furrows, which furrows answer to the radiating pores that occur in the bases of most Fig. 4J>.—Balands cuenatus, Inglefield Gulf, Greenland, a, labrum. C, MANDIBLE. 6, MAXILLA. According to Darwin: INIouth: Labrum with sis teeth. Mandibles with the fourth tooth minute or rudimentary, and the fifth generally confluent with the inferior angle. Maxillae with generally, but not invariably, a small notch under the upper pair of great spines. Cirri, first pair with the rami very unequal in length, one. 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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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
