252 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



(fig. of) ; but I generally notice that the terminal branch is shorter 

 and more feeble than the following, which is the most developed. 



The tentacle scale is of medium size (e) ; it usually ends in a short, 

 thick, and conical point ; sometimes there are two parallel points. 



Ophiothrix melanosticta is a preeminently littoral species, though 

 the Siboga found it in the Sunda Archipelago at depths as great as 

 73 meters (40 fathoms). The Challenger dredged it southwest of 

 New Guinea (lat. 8° Sk, long. 136° E.) in 90 meters (49 fathoms). 



OPHIOTHRIX NEREIDINA (Lamark). 



Plate 101, fig. 1. 

 See for bibliography : 



Ophiothrix nereidina Kcehler ('05), p. 81; ('07), p. 334; ('10), p. 294— H. 

 L. Clark ('15), p. 275; ('15a), p. 90; ('16), p. 91; ('17), p. 224. 



Localities. — Albatross station 5108 ; China Sea, off southern Luzon ; 

 Corregidor Light bearing N. 39° E., 41.70 kilometers (22.5 miles) 

 distant (lat. 14° 05' 05" N., long. 120° 19' 45" E.) ; 24 meters (1& 

 fathoms) ; January 15, 1908; Co. 



One specimen (Cat. No. E. 110, U.S.N.M.). 



Albatross station 5179 ; vicinity of Eomblon; Eomblon Light bear- 

 ing S. 56° E., 8.34 kilometers (4.5 miles) distant (lat. 12° 38' 15" N., 

 long. 122° 12' 30" E.) ; 68 meters (37 fathoms) ; March 25, 1908; 

 hrd. S. 



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



Albatross station 5249; Gulf of Davao; Lanang Point bearing 

 N. 1.85 kilometers (1 mile) distant (lat. 7° 06' 06" ST., long. 125° 

 40' 08" E.) ; 42 meters (23 fathoms) ; May 18, 1908; Co., S. 



Two specimens (Cat. No. E. 109, U.S.N.M.). 



Albatross station 5254; Gulf of Davao; Linao Point bearing N. 

 44° E., 1.29 kilometers (0.7 mile) distant (lat. 7° 05' 42" N., long. 

 125° 39' 42" E.) ; 38 meters (21 fathoms) ; May 18, 1908; S„ Co. 



Two specimens (Cat. No. E. 112, U.S.N.M.). 



Notes. — The hook formed by the first ventral arm spine has three 

 branches and is of the usual type (pi. 101, fig. la). The tentacle 

 scale, which is of medium size, ends in a long conical point sometimes 

 replaced by two parallel and slightly shorter points (fig. lb). 



Ophiothrix nereidina is very widely distributed in the Indo-Pacific 

 region and has mostly been collected in littoral stations. The Siboga. 

 however, found it at various depths down to 45 meters (27 fathoms). 



OPHIOTHRIX PAVIDA, new species. 



Plate 39, figs. 6, 7. 



Locality. — Albatross station 5179; in the vicinity of Eomblon; 

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



