Following are identifications of bulk and picked samples of larger invertebrates from the Bootlegger Cove Clay, Cook Inlet, Alaska. The samples are from localities about 2 to 3 miles northwest of Anchorage (853 and 941) and about 3 miles west-southwest of Anchorage (925 and 947). The material will be returned as requested, but we are keeping representative specimens from the bulk collections.

Environmental inferences: These assemblages suggest a depositional environment in the sublittoral zone (=neritic zone), possibly in the middle/or upper part of the zone. There are no exclusively intertidal or extremely shallow water species represented in the collections. The low degree of faunal diversity and the numerical abundance of pelecypods in the samples are of interest. Sometimes these factors are indicative of a bay environment. The number of species in these assemblages seems unusally low even for a soft, muddy substratum.