I 



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



angles. Siirface marked with numerous closely-set, small angular excavations. Length; 

 l-62d of an inch (-41 mm.). 



In a gathering taken in the "tow-net at trawl" in Wellington Harljour, New 

 Zealand, a good series of specimens belonging to this species were obtained. Though 

 small, its characters are well marked; the shell represented in fig. 4, e-h, probably 

 belongs to the male. The species is named after Mr John Murray, one of the several 

 able naturalists attached to the Challenger Expedition. 



[PL XVI. fig. 4, a-h. a Shell of female seen from left side, h from above, c from 

 below, c^from front, emale seen from left side, /from above, gr from below, ^ from front. 

 AU magnified 60 diameters.] 



15. Cijthere hicarinata, n. sp. (PL XVI. fig. 6, a-d). 



Shell compressed, oblong ; seen from the side, subtrapezodial, greatest height near 

 the middle, and equal to at least half the length ; extremities rounded, the anterior the 

 broader of the two, dorsal margin straight in the middle, sloping steeply and abruptly 

 towards each end, ventral straight in the middle, and gently curved upwards at the ends ; 

 seen from above, the outline is compressed, ovate, nearly thrice as long as broad, sides 

 nearly parallel, converging only slightly towards the extremities, Avhich are equal, broad, 

 subtruncated, and prominent in the middle ; end view subtriangular, height considerably 

 greater than the width, with convex sides, obtuse apex, and narrow flattened base ; sides 

 of the valves marked with distant, small impressed puneta, ventral surface having a 

 sinuous longitudinal keel on each side of the median line, these being continued round 

 almost the whole circumference of the shell in the form of an encircling flange. Length, 

 l-55th of an inch (-46 mm.). 



Found only in a dredging from the Inland Sea of Japan. Depth, 15 fathoms. (Station 



233?^.) 



[PL XVI. fig. 6, a-d. a Shell seen from left side, h from above, c from below, d from 

 front. Magnified 60 diameters.] 



16. Cythere inconspicua, n. sp. (PL XIII. fig. 1, a-d). 



Carapace oblong, short and stout; seen from the side subquadrangular, higher in 

 front than behind, greatest height equal to at least half the length ; anterior extremity 

 broad and well rounded, sometimes slightly toothed below the middle, posterior 

 narrower, truncated, and scarcely at all rounded ofi"; dorsal margin sloping almost in 

 a rio-ht line from the front, but behind the middle descending with a rather steeper 

 curve, ventral sinuated near the middle; seen from above, the outline is irregular, 

 the extremities being broadly truncated ; greatest width situated behind the middle, 

 whence the lateral margins converge slightly towards the front and abruptly towards 

 the hinder end, this part of the outline being broken by a large almost rectangular 



