Anomalocaris in cunis has large arm segments & large arms. Cyrtaster, any species has arms more narrow and nearly equal width to rig end or enlarging slightly toward end. The inter spaces are wider in emergence and this is verticle especially in the angles between the arms, and in this anal interbrachial space. Hemicystites stellatus has interradial spaces very small. Arms being elliptical oblong... Type examined. Clenapleurus planulatus Palaeke: Large greater con vexity at both ends known, clavicle not sharpmore, slender slightly forward end. Not depressing surface of carcti confirmed with Dorsal & ventral cl forms. Gyrdrdema pristitatum 747-2 Palaeke: Specimen marked as type came from sandstone rock with black and white Apparently with 4 simple flications followed by fine indistinct lines of striae. Not properly cleaned at least. Requires republishing. Mrdi'tpsii zurdilans Not type Palaeke: Strong appressed tentacle. 1130-1 Mrd'dlpsii zurdilans' West Durbia, Ferns in 195 = Phyllo'ngus Clenidiphrus planulatus 1926-7d Note much more vertical clavicle. Ferns in. 9 & certain steep clavicle Durn? 9 d Form?