OSTRACODA COLLECTED IN THE SOUTH SEA ISLANDS. 497 



basal joint of the first foot. Two pairs of feet, both of them clawed and adapted for 

 walking, the claw of the first pair hooked (as in the antennae). Caudal rami extremely 

 small, bearing three apical setae, two of them long and one very minute. Copulative 

 organs of the male large and complex. 



Anchistrocheles fumata, n. sp. (PI. III. figs. 13-14). 



Shell thin and fragile; seen from the side, reniform, greatest height equal to about half 

 the length and situated in the middle ; anterior extremity only slightly rounded, wide, 

 obliquely subtruncate, the obliquity looking downwards and forwards ; posterior narrowed, 

 somewhat produced in the middle, and rounded ; dorsal margin very gently and evenly 

 arched, ventral deeply incurved in the middle. Seen from above the outline is elongated, 

 ovate, about four times as long as broad, with nearly parallel sides ; anterior extremity 

 acute, posterior rounded. Shell smooth, transparent, smoky yellow with darker clouded 

 patches. Length '75 mm. 



This very interesting species was found only in one gathering from shore-pools at 

 Lufi-Lufi, Samoa. It forms a connecting link between the typical Cyprididee and 

 Cytheridse, the antennules having the long setose lash of a true Cyprid, while the antennas 

 possess only a few rudimentary hairs in place of the usual fascicle of setae ; the abortive 

 character of the second maxilla shows an approach to the Cytheridse, while the presence 

 of only two pairs of feet — the second of which, however, has the character belonging to 

 that structure in the Cytheridse — indicates another approximation to the Cyprididae. 

 The British species, A. acerosa is known from the shell only, and, until the discovery of 

 this Samoan species, was provisionally placed in the genus Cythere. 



Fam. Cytheridse. 

 Genus Cythere, Muller. 

 Cythere demissa, G. S. Brady. 



Cythere demissa, Brady, " Ostracoda of Challenger Expedition," p. 66, pi. xii. fig. 7 a-j. 



The specimens here referred to agree closely with those figured in the " Challenger " 

 Report. The species seems to be common and widely distributed, but varies a good deal, 

 especially in the number and development of the teeth on the posterior extremity. 



Habitat. — Noumea, in shore-sand, and dredged in 2-6 fathoms ; Levuka, between 

 tide-marks; Sava-Sava Bay, Vanua Levu, 4 fathoms ; Mango Island, fringing reef ; Rambe 

 Island, between tide-marks ; Lufi-Lufi, Upolu, shore-pools and reef between tide-marks. 



Cythere crenata, n. sp. (PI. II. figs. 35-36). 



Cythere crispata, Brady, " Ostracoda of Challenger Expedition," p. 72, pi. xiv. fig. 8 a-d. 

 Shell, seen from the side, oblong, subreniform, highest near the front, height equal to 

 at least half the length. Anterior extremity broad and well rounded, posterior narrowed, 



VOL. XXXV. PAET II. (NO. 14). 4 N 



