96 THE VOYAGE OF H.M.S. CHALLENGEE. 



61. Cythere euplectella, G. S. Brady (PI. XXV. fig. 3, a-d). 



Cijfhere euptectella, Brady, Les Fonds do la ^fer, p. 157, pi. xvi. figs. 5-7. 



Shell tumid, subovate ; seeu laterally, oblong, rather higher in front than behind, 

 height equal to more than half the length ; anterior extremity rounded, bordered with 

 a row of small, blunt teeth, and distinctly angulated at its jimction with the dorsum ; 

 posterior narrowed, irregularly jagged, produced in the middle, and bearing four or five 

 spines of irregular lengths ; seen from above, the outline is ovate, tumid, greatest width 

 behind the middle, and equal to two-thirds of the • length ; extremities rounded, the 

 posterior much the wider of the two ; the spines of the anterior and posterior extremities 

 project strongly, and give a marked character to the shell ; end view broadly cordate. 

 The surface of the shell is marked with a network of ribs, which cross each other at right 

 angles, enclosing deep fossae ; the longitudinal ribs are more prominent than the trans- 

 verse. Length, l-45th of an inch ('53 mm.). 



Found only in a dredging from Station 189, lat. 9° 59' S., long. 137° 50' E., 28 

 fathoms. The type specimens are from Hong Kong. The species is well characterised 

 by the peculiai*, and, in well-marked specimens, the very beautiful shell-sculpture. The 

 cavities with which the shells of Ostracoda are so commonly adorned, usually appear 

 as if simjDly scooped out of the substance of the valves, but in the case of Cythere 

 euplectella, they give the impression of being formed by the crossing of two series of ribs. 

 I know of no other species in which precisely tlie same structure occurs. 



[PL XXV. fig. 3, a-d. a Shell seen from left side, b from above, c from below, d from 

 front. All magnified 50 diameters.] 



62. Cythere goujoni, G. S. Brady (PI. XXV. fig. 7, a-g). 



Cythere goujoni, Brady, Les Fonds de la Mer, torn. i. p. 78, pi. x. figs. 9, 10. 



This species very closely approaches Cythere papuensis, but is more angular in its 

 contour, both as viewed from above and from the side. Seen laterally, it is highest 

 near the front, the height of the female being equal to more than half the length ; the 

 anterior margin is rounded, and has several distant sharp spines ; the posterior is trun- 

 cated, angular at its upper termination, and bears a few small, blunt spines below the 

 middle ; the dorsal margin is sinuated behind its highest point, and then slopes with a 

 gentle curve backwards ; ventral margin slightly convex ; seen from above, the outline 

 is subovate, about twice as long as broad, and widest near the middle, the extremities 

 are truncated, but the anterior is considerably broader than the posterior, and there are 

 two conspicuous lateral spines, one on each valve, near the hinder extremity ; end view 

 very broadly ovate. Surface of the valves covered with closely-set angular cavities. 

 Length, l-38th of an inch ("66 mm.). 



This species was noticed in three dredgings : — from Port Jackson, 2 to 10 fathoms; 



