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Show 6 9 8 DR. G. S. BRADY ON ENTOMOSTRACA [J u n e 19, Cyclops distinctus Lilljeborg, Synopsis specierum hue usque in Suecia observatarum generis Cyclopis (1901). This species was found in most of the nettings. It is closely allied to C. cdbidus Jurine. So far as appears from Mr. Lucas's collections, it seems to be the prevailing form of Cyclops in the New Zealand Lakes. C yclops se r r u l a tu s Fischer. This common Northern species occurred, though only sparingly, in several of the nettings; but the serrulation of the caudal stylets is seldom so distinctly marked as in European specimens. O s t r a c o d a . Genus N e w n h a m ia King. Like Notodromas, except that the mandibular palp bears a small rudimentary branchial appendage the filaments of which are directed upwards, and that the posterior maxillfe have two branchial filaments attached directly to the limb and not arising from a distinct plate: the shell profusely tuberculated over the whole surface. (Mr. King's description of the genus is : " eyes two, distinct, pedunculated, with a corresponding tubercle on each valve: a boat-shaped plate on ventral margin.") N e w n h a m ia f e n e s tr a t a King*. (Plate X LY III. figs. 6-9 and Plate L. figs. 1-13.) Newnhamia fenestrata King, On Australian Entomostraca (Proc. Royal Soc. Van Diemen's Land, vol. iii. pi. ix a . 1-12 ; Vavra, Die Ostraeoden vom Bismarck-Archipel (Archiv f. Natur-gesch. 1901, p. 180, pi. viii. figs. 1-15). Female. Shell seen laterally broadly elliptical; height equal to three-fourths of the length ; extremities rounded, subtruncate, the anterior rather the narrower of the tw o ; dorsal margin feebly arcuate, ventral rectilinear in the middle, rounded off toward each extremity: seen from above (PI. L. fig. 2) the outline is ovate, broadly rounded behind, tapering evenly from the middle to the acuminate anterior extremity ; greatest width equal to more than two-thirds of the length and situated behind the middle; the greater part of the ventral surface occupied by two broad, sinuous flanges on the contact margins of the two valves, and by broad crescentic flattened plates stretching from these flanges nearly as far as the lateral margins of the shell; the flanges are smooth and longitudinally sulcate, but each lateral plate is beautifully ornamented with four rows of concentric parallel rows of rounded tubercles (fig. 3); the general surface * " On Australian Entomostraca," by the Rev. R. L. King, B.A. (Papers and Proceedings of the Royal Society of Van Diemen's Land, January 1855). |