OPHITJRANS OF THE PHILIPPINE AND ADJACENT WATEKS. 279 

 OPHIOTHRIX TRILINEATA Liitken. 



Plate 46, figs. 1-3 ; plate 102, fig. 4. 



See for bibliography : 



Ophiothrix trilineata Loriol ('93), p. 43. — Kgehlee ('05), p. 73; ('07), p. 

 339.— H. L. Clark ('15), p. 279. 



Locality. — Albatross station 5109; China Sea, off southern Luzon; 

 Corregidor Light bearing N. 42° E., 47.81 kilometers (25.8 miles) 

 distant (lat. 14° 03' 45" N., long. 120° 16' 30" E.) ; 22 meters (12 

 fathoms) ; January 15, 1908; Co. 



Five specimens (Cat. No. 41336, U.S.N.M.). 



Notes. — The specimens are not in very good condition, but the de- 

 termination is not open to question. I have not been able to obtain 

 good photographs of them, but I include photographs of a specimen 

 in good state of preservation which I have in my own collection and 

 which comes from Mauritius. I have chosen this specimen for illus- 

 tration in order to show that the three light lines which run all along 

 the dorsal surface of the arms are not always well marked ; at least 

 the two lateral lines do not always have very clear outer borders, for 

 the darker bordering which often occurs beyond them may be only 

 barely indicated. 



On plate 102 as figure 4 I give photographs of some arm spines 

 (a and 6), of some spines from the dorsal surface of the disk (d), of 

 the tentacle scale, which ends in a rather stout point (c), and of the 

 hook representing the first ventral arm spine (e) ; this last has the 

 usual form, with three branches. 



Ophiothrix trilineata is very widely distributed in the Indo-Pacific 

 region ; the Siboga dredged it at different stations among the Sunda 

 Islands at depths up to 54 meters (30 fathoms), and a specimen from 

 the anchorage of Pasir-Pandjan was even labeled 278 meters (154 

 fathoms). 



OPHIOTHRIX VITREA Doderlein. 



Plate 48, figs. 1-4 ; plate 102, fig. 5. 



Ophiothrix ritrea Doderlein ('96), p. 295, pi. 14, fig. 10; pi. 16, fig. 21.— 

 KtEHLER ('98), p. 101.— H. L. Clark ('15), p. 282. 



Localities. — Albatross station 5139; in the vicinity of Jolo; Jolo 

 Light bearing S. 51° W., 6.67 kilometers (3.6 miles) distant (lat. 

 6° 06' 00" N., long. 121° 02' 30" E.) ; 36 meters (20 fathoms) ; Feb- 

 ruary 14, 1908 ; co. S. 



One specimen (Cat. No. 41324, U.S.N.M.). 



Albatross station 5179; in the vicinity of Romblon; Romblon 

 Light bearing S. 56° E.. 8.34 kilometers (4.5 miles) distant (lat. 



