OPHIUEANS OF THE PHILIPPINE AND ADJACENT WATEKS. 267 



The hook which represents the first ventral arm spine is strongly 

 developed and robust almost to the base of the arms ; it carries three 

 large thick spines ; the two first are almost of the same size, and the 

 third is a little stouter (pi. 101, fig. 5d). The tentacle scale, which is 

 very small, ends in a long point and recalls that of O. pusilla (e). 



The coloration of the two specimens from the Philippines is 

 slightly different from that of the Sib ago, specimen which served me 

 for the type of the species ; as a whole the general coloration is gray 

 with blue spots. In the specimen from station 5108 the dorsal surface 

 of the disk is gray, with a rounded blue spot on each radial shield ; 

 this spot is very close to the internal border and the distal angle of 

 the shield. Each upper arm plate regularly shows at its base and on 

 either side of the median line a small blue spot, and there is further 

 an indication of a white median line bordered by darker areas ex- 

 tending throughout the whole length of the arms. The ventral sur- 

 face of the disk is dark brown, and the arms are yellowish gray with- 

 out blue spots. 



In the specimen from station 5165 the blue markings are more 

 accentuated. Each radial shield bears a large blue spot toward its 

 distal angle, and within this there is another smaller. The dorsal 

 surface of the arms shows broad blue transverse striae which cover 

 the proximal part of the upper arm plates and of the side arm plates. 

 The ventral surface shows the same coloration as in the other; in 

 both the spines of the disk and of the arms are gray. 



Ophiothrix spinosissima was discovered by the Siboga at Lombock 

 and Banda at depths between 9 and 36 meters (5 to 20 fathoms). 



OPHIOTHRIX STELLIGERA Lyman. 



Plate 53, figs. 1-5 ; plate 54, figs. 1-6 ; plate 55, figs. 1-4 ; plate 56, figs. 4-7 ; 



plate 102, figs. 2-3. 



See for bibliography and synonymy : 

 Ophiothrix stelliffera KCEHLEE ('05), p. 87; ('07b), p. 253; ('10), p. 294. 



MACINTOSH ('11), p. 163. H. L. CLAEK ('14), p. 153; ('15), p. 279. 

 Ophiothrix ciliaris KCEHLEB ('04a), p. 100. 



Localities. Albatross station 5131; Sulu (Jolo) Sea, off western 

 Mindanao ; island off Panabutan Point bearing N. 20 E., 0.74 kilo- 

 meter (0.4 mile) distant; 49 meters (27 fathoms) ; February 6, 1908; 

 gn. M., co. S. 



One specimen (Cat No. 41033, U.S.N.M.). 



A Ibatross station 5138 ; in the vicinity of Jolo ; Jolo Light bearing 

 S. 19 E., 4.63 kilometers (2.5 miles) distant (lat. 6 06' 00" N., long. 

 120 58' 50" E.) ; 35 meters (19 fathoms) ; February 14, 1908 ; S., Co. 

 One specimen (Cat. No. 41030, U.S.N.M.). 



