48 AGLAJA. 



D. nigrum MARTENS, Monatsber. K.-P. Akad. Wissensch., 1879, 

 p. 738 (1880). 



The name of this species must be changed if, as I suspect,. 

 Philinopsis nigra of Pease proves to be an Aglaja. 



A. GUTTATA v. Martens. TJnfigured. 



Living animal 4-5 cm. long, 2-3 cm. wide. Head and back 

 brown, with close isabella-yellow flecks in which are brown dots or 

 lines. Sole bluish-brown with yellow flecks, the margins blue and 

 yellow. Perhaps only a variety of D. cyaneum v. vittatum* 

 (Mobius). 



Spirit examples pretty clear gray-brown, head-shield and back 

 with dark-red-brown spots, veins and dots ; foot darker, with num- 

 erous isabella-yellow roundish spots. The head-shield is (in spirit 

 examples) as long or longer than the posterior body, and is coarsely 

 granulated rather than wrinkled, in D. cyaneum v. vittatum it is 

 shorter and more wrinkled longitudinally. (Mart.*). 



Fouquets, Mauritius (Mobius). 



D. guttatum MARTENS, Beitr. zur Meeresfauna der Insel Mauri- 

 tius u. der Seychellen, p. 306 (1880). 



A. MARMORATA Smith, PI. 1, figs. 1, 2, 3, 4, 5. 



Animal (in spirit) blackish, copiously mottled with a dirty buff 

 color. Cephalic disk longer than wide, rather narrower in front 

 than behind, with a thickened two-fold margin anteriorly and at the 

 sides, more expanded and simple posteriorly. Hinder dorsal disk 

 a little shorter than the front one, lobed posteriorly on each side, 

 with an intermediate sinus, with a free margin at the sides, but not 

 in front, where it is covered by the hinder free extension of the 

 cephalic disk. Viewed posteriorly, the animal is truncate, termina- 

 ting in a curved expansion of the dorsal disk on each side which 

 conceal the gills beneath them. Foot extending the whole length of 

 the animal, with a duplex margin in front below the mouth and for 

 a short distance along the sides, and then simple and gradually in- 

 creasing in the width of the expansion towards the end, where it is 

 very wide beneath the branchia ; it is stained with black on the 

 inside of the edge. Branchial plume posterior, concealed beneath 

 the foot and the hinder lobes of the dorsal disk. Head presenting 

 exteriorly a small lobe on each side the 'oral opening. 



