. Bulletin - United States National Museum. Science. 236 BULLETIN" 10 0, UNITED STATES NATIOlSrAL MUSEUM deep body, which often less deep in old examples. These may be confused with Plectorhinchus pietus in their general appearance, but may be distinguished by the greatly more fleshy lips and the absence of spots on the fins. Old examples of Plectorhinchus nigrus show the whole body more or less obscurely mottled, often each scale may have a slightly darker ill-defined spot or a pale or grayish spot. The fins in every case are more or less dusky and though clouded never spotted. The elong
. Bulletin - United States National Museum. Science. 236 BULLETIN" 10 0, UNITED STATES NATIOlSrAL MUSEUM deep body, which often less deep in old examples. These may be confused with Plectorhinchus pietus in their general appearance, but may be distinguished by the greatly more fleshy lips and the absence of spots on the fins. Old examples of Plectorhinchus nigrus show the whole body more or less obscurely mottled, often each scale may have a slightly darker ill-defined spot or a pale or grayish spot. The fins in every case are more or less dusky and though clouded never spotted. The elongated body with advanced age is a confus- ing feature of the two species, though in Plectorhinchus nigrus the dorsals are with a distinct emargination separating the two 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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