324 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



to the two first it is logically necessary to distinguish the last also 

 in a similar way. 



Matsumoto ('17, p. 346) believes that O. scolopendrina, 0. eri- 

 naceus, and O. schonleini belong to one and the same species, and he 

 designates them, respectively, under the names O. scolopendrina 

 typical, O. scolopendrina, var. crinaccus, and 0. scolopendrina, var. 

 schonleini. 



In 1915 H. L. Clark published very good photographs of a quite 

 typical O. erinaceus ('15, pi. 15, figs. 5, 6). I shall content myself 

 with figuring here (pi. 73, fig. 7) the dorsal surface of a specimen 

 in which the first dorsal spine is especially developed and elongated 

 (station 5109). 



OPHIOCOMA LINEOLATA Muller and Troschel. 



Plate 73, figs. 1-4.- 

 Synonyms : 



Ophiocoma pica MItixer and Troschel. 

 Ophiocoma sannio Lyman. 



See for bibliography: 



Ophiocoma lineolata Loriol ('93), p. 28. 



Ophiocoma pica Kcehler ('05), p. 62; ('07), p. 326. — H. L. Clark ('15), 

 p. 293. 



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 (13 

 fathoms) ; January 15, 1908 ; co. 



Two specimens (Cat. No. E. 302, U.S.N.M.). 



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" K, long. 120° 16' 30" E.) ; 22 meters (12 fathoms) ; Janu- 

 ary 15, 1908 ; co. 



Twelve specimens (Cat. Nos. 40914, E. 303, E. 304, U.S.N.M.). 



Notes. — Authors who since Muller and Troschel have published 

 descriptions of this species (Lyman '65, p. 90; Walther '85, p. 370; 

 Lorion '93, p. 28) have discussed especially the variations which it 

 shows in its coloration, but they have not spoken of the differences 

 which may be observed in its structure, and particularly the differ- 

 ences in the form and in the length of the arm spires. Lyman 

 expresses himself thus on the subject of the arm spines: " Arm spines 

 six, remarkably slender, tapering and regular;" these are the char- 

 acters which are most usually observed, and they are those which 

 I find in several specimens from station 5109. As these are mostly 

 not in a good state of preservation, and especially as they are more 

 or less incomplete, I have selected for photographing a specimen 

 which I have in my own collection from Ceylon, of which the char- 

 acters agree well with Muller and Troschel's description and with 



