OPHIUBANS OF THE PHILIPPINE AND ADJACENT WATERS. 195 



24" N., long. 124 05' 30" E.) ; 46 meters (25 fathoms) ; March 16, 

 1909; S., Sh. 



Two specimens (Cat. No. 41104, U.S.N.M.). 



Albatross station 5401; north of Cebu; Tanguingui Island Light 

 bearing N. 79 W., 42.62 kilometers (23 miles) distant (lat. 11 24' 

 45" N., long. 124 06' 00" E.) ; 55 meters (30 fathoms) ; March 16, 

 1909; fne. S. 



One specimen (Cat. No. 41108, U.S.N.M.). 



Albatross station 5554; Jolo Island and vicinity; Cabalian Point 

 (Jolo) bearing N. 76 E., 7.04 kilometers (3.8 miles) distant (lat. 5 

 52' 27" N., long. 120 52' 18" E.) ; 46 meters (25 fathoms) ; Sep- 

 tember 18, 1909; Co., S. 



Eighteen specimens (Cat. No. 41110, U.S.N.M.). 



Jolo Island ; February 11, 1908. 



Two specimens (Cat. No. 41101, U.S.N.M.). 



Marongas Island; Shore Canal; February 10, 1908. 



Six specimens (Cat. No. 41102, U.S.N.M.). 



Jolo (interior of pearl oyster). 



One specimen (Cat. No. 41050, U. S. N. M.). 



Notes. The specimens from stations 5249, 5257, and 5321 have 

 five arms; one of the individuals from station 5147 has five arms, 

 and the other has six. All the remainder have six arms. 



The two mouth papillae are not very evident in the photographs 

 which I published in 1914 ('14a, pi. 7, fig. 15, and pi. 9, fig. 8). I 

 give here two photographs (pi. 63, figs. 5, 6) of the ventral surface 

 of two specimens collected by the Albatross, one with five, the other 

 with six arms, on which these two papillae may be better seen. I also 

 give on plate 96 as figure 2 some photographs of the arm spines as 

 seen under the microscope. 



OPHIOPHOLJS MIRABILIS (Duncan). 



Plate 61, fig. 3 ; plate 96, fig. 14. 



Ophiolepis miraUlis DUNCAN ('79), p. 460, pi. 9, fig. 12; pi. 10, figs. 13, 14. 



Ophiopholis mirabilis LYMAN (79), p. 43; ('82), p. 112. H. L. CLARK 



('11), p. 117, fig. 43; ('15), p. 268. MATSUMOTO ('17), p. 160, fig. 40. 



Locality. Hakodate, Japan. 



Seventy-one specimens (Cat. No. E. 37, U.S.N.M.). 



Notes. The diameter of the disk varies between 15 mm. and 4 mm. 



Ophiopholis mirabilis is a very easy species to recognize, and the 

 specimens collected by the Albatross are quite characteristic. I no- 

 tice that the upper arm plates are a little larger than in the figure 

 published by H. L. Clark ('11, p. 117, fig. 43) ; sometimes these 

 plates are divided into two parts by a groove which is more or less 



