1... Astrocharis gracilis n. sp. 
By 
Dr. Th. Mortensen. 
Diameter of disk 4 mm; longest arms ca. 25—30 mm; exact 
measurement is difficult on account of their coiled up condition. 
Disk flat, covered by a fine mosaic of small, irregular, smooth 
plates which are not imbricated; some of them are slightly larger 
and of somewhat coarser structure, which makes them a little 
darker in colour; they are, however, not so regularly arranged 
that they may be stated directly to represent the primary disk 
- plates. The radial shields are very distinct, entirely naked, separ” 
ated from each other by several small scales (Fig. 2). The inter- 
radial borders are deeply indented; there is a more or less distinct 
swelling of the disk over the base of the arms. 
The oral side (Fig. 1) has the same covering of small irregular 
Scales, none of them being conspicuous through a larger size or å 
Coarser structure, No oral shields or adoral plates can be disting- 
uished, The slightly larger plate in the median line in the middle 
Interradius in Fig. 1 cannot be regarded as representing a rudi- 
mentary oral shield; nothing corresponding exists in the other 
Interradii. The mouth angles are somewhat elevated, rounded. They 
Carry a single papilla at the point, their sides being entirely naked. 
The genital slits are vertical and lie very close together in the 
edge of the disk, separated from each other only by a very når” 
row bridge (Figs. 1, 3). A somewhat larger scale, the genital 
Scale, is seen at the lateral border of each slit. 
There are six arms; they are covered by the same mosaic of 
Small plates as the disk; dorsal and ventral plates indistinguishable 
In the general plating. Also the side arm plates are indistinguish- 
able; the banded appearance of the larger arms in Fig. 6 is dué 
"0 an alternating slight thickening, corresponding. to the arm joints, 
