18 BULLETIN 84, UNITED STATES NATIONAL MUSEUM. 



OPHIOGLYPHA INORNATA Lyman. 

 = Ophioglypha divisa Ltitken and Mortensen. 



See for bibliography : 



Kcehler (04), p. 40. 

 Koehler (07), p. 262. 



Albatross station 2754. Dec. 5, 1887. Lat. 11 40' N.; long. 58 35' W.; 

 880 fathoms; glob, oz.; temp. 38 F. Three specimens. The diameter of the 

 disk ranges between 10.5 and 9.5 mm. 



I refer to the above-mentioned papers for the variations of 0. inornata. 



In the three examples from the Albatross, the upper plates of the disk rather 

 suggest, by their arrangement and the shape of the radial shields, 0. abyssorum, 

 with which one of the specimens from the Siboga also offered some likeness, but 

 the other characters do really correspond with those of 0. inornata. On the two 

 larger specimens the mouth shields are separated into two halves by a furrow 

 extending over their whole length, as Lyman figured it (82, pi. 3, fig. 10) ; sometimes, 

 even, the furrow is bifurcated so that the mouth shield is divided into three pieces, 

 but the under plate which comes after it is never divided. On the third speci- 

 men, which is somewhat smaller, the mouth shields are entire. In none of these 

 specimens are the upper brachial plates fragmented. 



OPHIOGLYPHA IRRORATA Lyman. 



Plate 1, figs. 3Hl. 



See, among other papers, for the bibliography: 



Ophwglypha irrorata LYMAN (82), p. 47. 



Ophioglypha orbiculata LYMAN (82), p. 48. 



Ophioglypha irrorata LYMAN (83), p. 243. 



Ophioglypha grandis VEHRILL (94), p. 293. 



Ophioglypha irrorata KCEHLER (96), p. 19. 



Ophioglypha involuta KCEHLER (97), p. 295. 



Ophwglypha orbiculata KCEHLER (97), p. 302. 



Ophioglypha orbiculata KCEHLER (99), p. 21. 



Ophwglypha tumulosa LUTKEN and MORTENSEN (99), p. 121. 



Ophwglypha tumulosa LUDWIG (05a), p. 397. 



Ophwglypha tumulosa KCEHLER (07), p. 296. 



Ophioglypha mundata KCEHLER (07o), p. 257. 



Ophioglypha mundata KCEHLER (09), p. 153. 



Ophioglypha irrorata H. L. CLARK (11), p. 62. 



Albatross station 2358. Jan. 29, 1885. Lat. 20 19' N.; long. 87 03' 30" W.; 

 222 fathoms; fne. wh. co. One specimen. 



Albatross station 2573. Sept. 2, 1885. Lat. 40 34' 18" N.; long. 66 09' W.; 

 1,742 fathoms; gy. m. s.; temp. 37.3 F. Nine specimens. 



For the reasons which I give below, one must consider as being synonymous 

 0. irrorata, 0. orbiculata Lyman, grandis Verrill, involuta Kcehler, tumulosa Liitken 

 and Mortensen, and mundata Kcehler. The specimens which I mention above 

 come from the same set as those which were used by Verrill to introduce 0. grandis 

 and they correspond exactly with the description given by him. 



