REPORT ON THE OSTRACODA. 119 



[PI. XXVIII. fig. 2, a-d. a Carapace sceu from left side, 6 from above, c from 

 below, d from front. Magnified 50 diameters.] 



6. Loxoconclm sculpta, G. S. Brady (PI. XXIX. fig. 5, a-d). 



Loxoconcha sculpta, Brady, Les Fonds de la Mer, torn. i. p. 140, pi. xviii. figs. -5, 6. 



Carapace of the female (?), seen from the side, short, subrhomboidal, greatest height 

 in the middle, and eqvial to about two-thirds of the length ; anterior extremity obliquely 

 rounded, posterior produced in the middle into a wide truncated beak ; dorsal margin 

 high, and somewhat arched near the middle, thence sloping backwards in a right line ; 

 ventral margin gently convex ; seen from above the outline is compressed, and nearly 

 diamond- shaped, widest in the middle, the width being ec[ual to half the length, tapering 

 to the extremities which are subacuminate ; end view subtrapezoidal, considerably higher 

 than broad, widest at the base, which is concave, apex wide and subtruncate, sides greatly 

 curved. Shell-surface sculptured with large and closely-set angular pits ; anterior margin 

 sometimes slightly denticulated below the middle ; at the posterior dorsal angles are two 

 prominent subconical eminences, which are especially conspicuous when viewed from above 

 or below, forming rectangular lateral projections. Length, l-50th of an inch ("5 mm.). 



Dredged off" Booby Island, lat. 10° 36' S., long. 141" 55' E., 6 to 8 fathoms. 



The type specimens described in Les Fonds de la Mer were dredged at St Vincent, 

 Cape Verde. 



[PI. XXIX. fig. 5, a-d. a Carapace of female (?) seen from left side, h from above, 

 c from below, d from front. Magnified 50 diameters.] 



7. Loxoconcha australis, n. sp. (PL XXVIII. fig. 5, a-f, and PL XXIX. fig. 3, a-d). 

 Carapace of the female tumid ; seen from the side, subrhomboidal, nearly equal in 



height throughout ; anterior extremity well rounded, jjosterior rounded, prominent in 

 the middle, and emarginate at the upper angle ; dorsal margin nearly straight, ventral 

 slightly .sinuated ; height equal to nearly two-thirds of the length ; seen from above, 

 broadly ovate, with strongly mucronate extremities, greatest width situated in the middle, 

 and equal to the height ; end view subcordate, wide below, and obtusely pointed above. 

 Surface of the shell marked with rather large and closely-set angular excavations, which 

 have an obscurely concentric arrangement ; ventral surface strongly grooved longitudinally, 

 the pittings being placed in the furrows. The shell of the male (PL XXVIII. fig. 5, e-f), 

 is longer and narrower, but in other respects shows much the same characters as that of 

 the female. Length of the male, l-38th of an inch ("66 mm.) ; of the female, l-48th of 

 an inch ("52 mm.). 



Dredged at Port Jackson, Australia, in a depth of 2 to 10 fathoms, and off Booby 

 Island, lat. 10° 36' S., long. 141° 55' E., 6 to 8 fathoms. 



