202 



with two small setae near the distal end of the inner margin. The distal joint is elongate and 

 rather narrow. The distal end of the joint is furnished with five spines of various degrees of 

 stoutness (Plate LXI, fig. 13). 



Note. — In the explanation of this plate, fig. 13, is given as fivst foot and fig. 14, the fifth foot. Fig. 13, should be read fifth 

 foot and fig. 14, first foot. 



Male unknown. 



This species appears to be closely related to Harpactiats gracilis Claus, but it can 

 readily be separated by the quite distinct shape and armature of the inner expansion of the 

 proximal joint of the fifth pair of feet. 



Occurrence. — One specimen was obtained from the plankton collected at the surface 

 at Station 35 (Paternoster Islands), on March 2 8th. 



3. Harpacticus glaber Brady. Plate LXI, Figs. 15 — 21. 

 Harpacticus glaber Brady, 1899, p. 44, pi. XII, figs. 6 — 11. 



One female apparently identical with the above species was obtained from the plankton 

 collected at the surface at Station 35 (Paternoster Islands), on March 2Sth. 



The apex of the expanded portion of the proximal joint of the fifth pair of feet is 

 armed with three moderately strong setae. The distal joint is oval in outline and is comparatively 

 short. The antennules are not so elongate as in Harpacticus clausi. Brady's single specimen 

 is described as having eight-jointed antennules, but the antennules of the present specimen 

 are nine-jointed. The eighth joint is short and agrees fairly well with the length of the last 

 joint of Harpacticus glaber. It is quite possible that the antennules of Brady's specimen may 

 have been imperfect. The shape and armature of the inner expansion of the proximal joint of 

 the fifth pair of feet is quite distinct from any of the other known members of the genus 

 Harpactiats, or its closely related ally Tigriopus. Hapacticus glaber is the only known species 

 with three setae arranged closely together on the apex of the inner expansion of the basal 

 joint of the fifth pair of feet. The distal ends of the ventral margin of the thoracic segments 

 of this species are broadly rounded. 



Length of 'Siboga' female — .56 mm. 



Brady's single specimen was found in surface plankton collected in Otago Harbour, 

 New Zealand. 



27. Family Peltidiidae. 

 Genus Peltidium Philippi, 1839. 



The conspicuous anastomosing chitinous bands that traverse every segment of the animal, 

 assist very considerably in the separation of the members of this genus from any of the other 

 genera belonging to the family. The endopodite of the first pair of feet is comparatively broad 

 and two-jointed. The fifth pair of feet is two-jointed and is entirely obscured, when viewed from 

 above, by the very wide genital segment. 



The genus Oniscidiuin Claus (1860) and the genus Reticulina Cleve (1901) are both 



