REPORT ON THE OSTRACODA. 123 



ends ; when seen from above, they are also rather more tumid, and the sculpturing is 

 considerably coarser ; but the general build and appearance is exactly that of the 

 Mauritius species. The three series of figures given in PI. XXVII. represent various 

 stages of growth, figures a-c being probably the adult female, and h-j perhaps the 

 young male. 



This is very nearly allied to the preceding species [Loxoconcha variolata), but as will 

 be at once seen on reference to the figures in PI. XXIX., it is more angular in its contours, 

 and the lateral alee are very much more prominent. Loxoconcha hastata, Brady (see 

 Les Fonds de la Mer), is another closely related species. 



[PL XXVII. fig. 6, a-j. CO Carapace of adult female seen from left side, b from 

 below, c from front, cl younger female seen from left side, e from above, /from below, 

 g from front ; h male (?) seen from left side, i from below, _; from front. Magnified 50 

 diameters.] 



13. Loxoconcha anomala, n. sp. (PL XXVII. fig. 5, a-d). 



Carapace as seen from the side, flexuous, subrhomboidal, greatest height situated near 

 the middle, and equal to two-thirds of the length ; anterior extremity rounded, posterior 

 oblique, produced above the middle into a broad truncated beak ; superior margin 

 forming a flattened arch which slopes gently toward the front, but more abruptly, and 

 with a slight sinuation behind, ventral margin rather prominently convex behind the 

 middle ; seen from above, the outline would be almost a perfect rhomboid, but for the 

 abrupt constriction behind the lateral alse which project a little behind the middle of the 

 shell ; the extremities are acuminate, and the greatest width across the alte is equal to 

 two-thirds of the length. Seen from the front the outline is subtriangular and 

 equilateral, being almost exactly like the hull of a vessel seen " end on," the apex of the 

 triangle corresponding with the ventral margin, and produced into a distinct keel, the 

 sides evenly convex, and the base, which corresponds with the dorsum, angularly elevated 

 in the middle. The surface of the shell is marked by numerous irregular shallow pittings 

 of moderate size. Length, l-50th of an inch ("5 mm.). 



Of this remarkable species only a few examples were found in the 40 fathoms dredging 

 from the reefs at Honolulu, It is not a little remarkable that two forms so outre, and so 

 closely resembling each other in lateral outline, as this species and Loxoconcha honolu- 

 liensis should have occurred in this one dredging. But though so much alike when 

 viewed sideways, the diiference between the two from all other points of view is very 

 striMng, especially in the laterally projecting alas and in the remarkably broad dorsal 

 and narrowed ventral surface, a condition of which I know no other so marked an 

 example amongst the Ostracoda. 



[PL XXVII. fig 5, a-d. a Carapace seen from left side, b from above, c from below, 

 d from front. Mae-nificd 50 diameters. I 



