280 BULLETIN" 100, UNITED STATES NATIONAL MUSEUM. 



12° 38' 15" N., long. 122° 12' 30" E.) ; 68 meters (37 fathoms) ; 

 March 25, 1908 ; hrd. S. 



One specimen (Cat No. 41323, U.S.N.M.). 



Albatross station 5593; Sibuko Bay, Borneo and vicinity; Mount 

 Putri (sea tangent), Borneo, bearing N. 52° W., 31.87 kilometers 

 (17.2 miles) distant (lat. 4° 02' 40" N., long. 118° 11' 20" E.) ; 

 70 meters (38 fathoms) ; September 29, 1909 ; fne. S. 



One specimen (Cat. No. 41322, U.S.N.M.). 



Notes. — The specimen from station 5593 is in a very good state of 

 preservation, and the arms are almost complete ; the diameter of the 

 disk is 5.5 mm., and the arms exceed 45 mm. (pi. 48, figs. 1, 3) in 

 length. The two others have the arms broken off at a greater or lesser 

 distance from the base. The specimen from station 5139 is the 

 smallest, and its disk is only 3.5 mm. in diameter, while that from 

 station 5179 is larger, its disk diameter being 7 mm. 



The specimens from stations 5139 and 5593 (figs. 1, 2) have the 

 dorsal surface of the disk uniformly covered with fine and closely 

 crowded club spines ending in three large, divergent, and extremely 

 slender spinules, while on that from station 5179 the club spines are 

 mixed with elongate and very fine true spines (fig. 4). I give a few 

 photographs of these club spines (pi. 102, fig. 5c). They are always 

 trifid, with subequal spinules; the only variations which they show 

 concern the relative size of the stem and of the terminal spinules; 

 sometimes the stem is short and rather broad, with strong and very 

 long spinules, and sometimes the stem is slender and elongated with 

 the spinules weaker and shorter. The tentacle scale is rather large 

 and terminates in a chief point accompanied by a few other smaller 

 points (fig. 5b). The hook which the first ventral spine very soon 

 forms is of the usual type (a) ; it is rather elongated, but usually 

 the terminal branch only is well developed and very strong, the others 

 remaining very slender and narrow. The second arm spine is rather 

 thick and its, denticulations, which are more closely crowded toward 

 the extremity, are very stout (d), while the other spines are very 

 narrow with very fine denticulations (e). 



In 1898 I recorded three specimens of O. vitrea collected by the 

 Investigator among the Andaman Islands and on the Malabar coast ; 

 their scheme of coloration was a little different from that of the 

 single specimen which served Doderlein as his type, but, as I stated, 

 this latter naturalist, to whom I sent one of my specimens, considered 

 that it was O. vitrea. The three individuals collected by the Albatross 

 recall those of the Investigator in their coloration ; that is to say the 

 dorsal surface of the arms shows a purple median line, on each side 

 of which is a white band and outside of that another purple line. 

 The median purple line is not always entirely continuous, and it is 



