Smithsonian miscellaneous collections . ts thickly set and not arranged in groups. The inner process a shortslender spine swollen at its base, reaching a little beyond the edge ofthe pad. DIAPTOMUS (HESPERODIAPTOMUS) WARDI Pearse Figures 29-32Diaptomus zvardi Pearse, 1905, p. 148, pi. 13, figs. 1-4. The type locality of D. wardi is Spokane, Wash. So far as is known,types do not exist in any available collection, although Juday andMuttkowski (1915) mentioned that they examined specimens referredto them by Pearse. Marshs (1920) figure of D. wardi from PribilofIsland material is D. schefferi. The
Smithsonian miscellaneous collections . ts thickly set and not arranged in groups. The inner process a shortslender spine swollen at its base, reaching a little beyond the edge ofthe pad. DIAPTOMUS (HESPERODIAPTOMUS) WARDI Pearse Figures 29-32Diaptomus zvardi Pearse, 1905, p. 148, pi. 13, figs. 1-4. The type locality of D. wardi is Spokane, Wash. So far as is known,types do not exist in any available collection, although Juday andMuttkowski (1915) mentioned that they examined specimens referredto them by Pearse. Marshs (1920) figure of D. wardi from PribilofIsland material is D. schefferi. The confusion of these two species would be difficult to clarifywithout specimens of D. wardi. Fortunately the Light collection con-tains slides on which are appendages of two unidentified females(leg 5) and two males (leg 5 and antennules) which are so likePearses illustrations of D. wardi that there can be no doubt of theiridentity. These specimens occurred in the Montana collection with i8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122. Figs. 29-42.— (See legend on opposite page.) NO. 2 COPEPODS OF THE GENUS DIAPTOMUS WILSON 19 Diaptomus novemdecimus, described above. This apparently consti-tutes the first valid record of the species since its description. The protrusion of the second basipod segment of the male rightfifth leg is not at all like the lamella on the medial margin of D. schef-feri, which is definitely of cuticular origin. That of wardi appearsinstead to be an outwardly projecting lobed protrusion of the proximalinner portion of the segment itself. Until unmounted appendages notdistorted by cover-glass pressure can be examined, its exact structuremay not be determinable, but one of the slides contained a profile viewwhich appears to be quite natural (fig. 29). In the other mount, theoutline of the protrusion is clearly visible, though flattened (fig. 30).It appears to be of the nature of that described above for D. hirsutus. The Montana specimens agree with Pears
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