•432 MR. F. CHAPMAN ON DEEP-SEA FORAMINIFERA 



CyTHERE DASYDERMA, (ir. xS. i?ra(/;/. 



Cythere dasyclerma, Gr. S. Brady ('80), p. 105, pi. 17. figs. 4 a-f. 



This species is characteristic of deep-water habitats. 



Occurrence.— ^i?i. 10, 1485 fms. ; 11, 1417 £ms. ; 13, 1050 fms. ; 20, 

 1215 fms. 



Cythere quadriaculeata, G. S. Brady. 



Cythere quadriaculeata, G. S. Brady ('80), p. 86, pi. 22. figs. 2 a-d, pi. 25. figs. 4 a-d. 



The deep-water specimens found in the present series have thinner cara- 

 paces than those from shallower depths. 



Brady records the species from Japan, 15 fathoms ; and off the reefs at 

 Honolulu at 40 fathoms. 



Occurrence. — Sia. 13, 1050 fms. ; 20, 1215 Fms. 



Cythere curvicostata, G. S. Brady, var. phylloides^ Chapman. 

 Cythere phylloides, Chapman ('02"), p. 424, pi. 37. figs. 3a-c. 



Further examples of this form prove it to be a sparsely costate variety of 

 the above species, with impressed punctse in the place of regularly defined 

 pits arranged in rows between the riblets. 



Occurrence. — Sta. 3, 2715 fms. ; 20, 1215 fms. 



Cythere curvicostata, G. S. Brady, var. funafutiensis, nov. (Plate 57. 

 fig. 22.) 



This beautiful variety differs from the specific form as defined by Dr. Brady 

 in the following particulars :— The anterior border is devoid of the armature 

 of small teeth, being quite smooth. The surface sculpture is more numerously 

 costate, and the ribs are clear and sharp. 



Occurrence. — Sta. 20, 1215 fms. 



Cythere sweeti, sp. nov. (Plate 57. figs. 23 a, b.) 



Description. — Valves, seen laterally, nearly oblong, higher in front and 

 narrowing posteriorly. Height a little more than half the length. Anterior 

 border broad, rounded, and with a deep sulcus behind. Surface of valves 

 rising prominently towards the middle and ventral side ; the highest point in 

 the postventral area terminating with a short, sharp spine. Dorsal margin 

 straight, with a sudden sinuous turn to the posterior angle. Ventral margin 

 sinuous, and curving round to meet the posterior acumination. Surface of 

 valves finely sculptured with a polygonal network, the areolae tending to run 

 into straight lines parallel with the dorsal and ventral borders. Edge view 

 subovate, compressed anteriorly. Length '7 mm. ; height "375 mm. ; 

 thickness of carapace '34 mm. 



