292 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



at all broadened. These spines retain almost the same width through- 

 out their whole length. The denticulations, which are especially de- 

 veloped toward the tip, appear also less strong on the longest spines 

 (pi. 103, fig. Se) . The last dorsal spine is always more or less pointed. 

 The first ventral spine at some distance from the disk forms an 

 elongated hook showing at first five or six points, then, further on, 

 three only ; the two outer points are very much more developed than 

 the third. 



As I said in 1905, the tentacle scale is small and pointed. I give 

 a photograph of it on plate 103 as figure 8/. But following out along 

 the arm I notice that this scale does not persist very long, and dis- 

 appears at a short, though variable, distance from the disk. This 

 character impressed me in 1905. The dominant coloration of the 

 specimens collected by the Albatross is light pink; the ventral surface 

 of the disk is a more or less dark brown ; but the specimen from sta- 

 tion 5138 is very dark red ; on the other hand, certain specimens are 

 almost completely colorless, as for example those from stations 5080 

 and 5145. The annulations of the arms are only slightly evident, 

 and sometimes not evident at all. 



On its ventral surface and affixed near the mouth, the specimen 

 from station 4948 bears two parasitic prosobranchs belonging to 

 the genus Mucronalia and representing without doubt a new species. 

 The length of the shells is respectively 3 mm. and 2 mm. On plate 

 60, figure 6, I show the ventral surface of the parasitized ophiuran 

 with the two gasteropods in place. 



OPHIOGYMNA FUNESTA, new species. 



Plate 44, figs. 1-7 ; plate 103, fig. 9. 



Locality. Albatross station 5213; east of Masbate Island: Desta- 

 cado Island (S.) bearing N. 87 E., 15.T5 kilometers (8.5 miles) dis- 

 tant (lat. 12 15' 00" N., long. 123 57' 30" E.) ; 146 meters (80 

 fathoms) ; April 20, 1908; S., M., Sh. 



Sixty-six specimens (Cat. Nos. E. 187, E. 374, U.S.N.M.). 



Description. The diameter of the disk varies between 8 mm. and 

 10 mm.; the arms are extremely long, more or less contorted, and 

 rather slender ; their length usually exceeds 100 mm. 



The disk is rounded. The dorsal surface is covered with rather 

 numerous small plates, the outlines of which are not very evident, and 

 which are covered by a thin integument, often concealing a more or 

 less extensive portion of the radial shields. These are extremely 

 large and triangular, and their length appears to reach three-quarters 

 the radius of the disk, judging from the slight projection which they 

 cause under the integument; this last leaves exposed a certain por- 

 tion of the distal region of the shields, but the extent of this naked 



