OPHITJRANS OF UNITED STATES NATIONAL MUSEUM. Q 



the adult. Thus the central part of the upi^er and under brachial plates alone is 

 visible, and the bare parts of these plates remain separated from one anoflier by 

 several rows of gi-anules. These completely cover tlie lateral plates and the mouth 

 pieces, whicli in consequence entirely disappear. On the upper face of the disk, 

 however, the radial shields are distinct and completely bare. Tlie brachial spines 

 amount to sL\ only: They are short, small, conical, pointed, rather loosely set 

 together, and the first ventral one is a little larger than the others. The two suc- 

 cessive genital slits, whicl) normally exist in the genus OpModerma on each side of 

 the interradial spaces at the base of the arms, are ah-eady well shaped and well 

 separated. 



This specimen must be a j'oung one of a rather large-sized species, perhaps 

 of 0. cincrca. Owing to its peculiar characters, I beg to present here two illus- 

 trations which represent respectively its upper and its under face (pi. 2, figs. 1,2). 



OPHIARACHNELLA (=PECTINURA) ANGULATA (Lyman). 



Peciinura angulala Lyman (83), p. 232, pi. 3, figs. 7-9. 

 Pectinura angulata Veerill (99), p. 8. 

 Ophiarachndla angulata H. L. Clauk (09), p. ]24. 



Albatross station 2350. Jan. 20, 1885. Lat. 23° 10' 39" X.; long. 80° 20' 21" 

 W.; 213 fathoms; co. One specimen. 



The example is in good state, although one of the arms has been broken from 

 its base; the diameter of the disk is 25 nmi., and the length of the arms exceeds 

 120 mm. It is altogether in conformity with Lyman's description: There are three 

 pairs of pores at the beginning of the arms and the tentacular scales are really two. 

 It was owing to a misprint, which 11. L. Clark pointed out with reason, that I 

 indicated a single tentacular scale when comparing this species with Pectinura 

 honorata (04, p. 8). 



The BlaJce dredged 0. angulata between 88 and 248 fathoms, and the Bahama 

 expedition found it again on the Bahama Bank. 



BATHYPECTINURA TESSELLATA (Lyman). 



See for bibliography: 

 H. L. Clark (09), p. 130. 



Albatross station 2384. Mar. 3, 1885. Lat. 28° 45' N.; long. 88° 15' 30" W • 

 940 fathoms; br. gy. m.; temp. 39. G°F. One specimen. " *' 



Family OPHIOLEPID.E. 



OPHIOLEPIS ELEGANS Lutken. 



Ophiolepis clcgans Lutken (59), p. 105. 

 Ophiolcpis elcgans Lyman (65), p. 58, pi. 2, fig. 5. 

 Ophiolepis elcgans Lyman (82), p. 20. 

 Ophiolcpis elcgans Ives (89), p. 175. 

 Ophiolcpis elcgans IT. L. Clark (01), p. 242. 



Albatross station 2605. Oct. 18, 1885. Lat. 34° 35' 30" N.; long. 75° 45' 30" 

 W.; 32 fathoms; wh. s. bk. sp. One specimen. 



