THE SESSILE BAKNACLES. 41 



SOUTH ATLANTIC SPECIES. 



F. gilibosa Hoek, east of Patagonia, 1,863 meters. 



F. mitra Hoek, south latitude 70, west longitude 80 48', 555 

 meters. 



F. incerta Hoek, south latitude 32 34', west longitude 13 5', 

 2,565 meters. 



V. quadrangularis Hoek, south latitude 35 39', west longitude 50 

 47', 3,240 meters. 



INDO-PACIFIC SPECIES. 



F. sulcata Hock, near the Kennadec Islands, 950-1,165 meters. 



F. nitida Hoek, Malay Archipelago, 915 meters. 



F. plana Gruvel, off Andaman Islands, 380-465 meters. 



F. cristallina Gruvel, off Andaman Islands, 768 meters. 



VERRUCA HOEKI Pilsbry. 



1907. Verruca hocki PILSBRY, IT. S. Nat. Mua. Bull., No. 60, p. IIP,, pi. 11, figs. 

 4, 5, 6. 



Type. Cat. No. 1493, U.S.N.M. 



Type-locality. Albatross station 2750, Anegada Passage, in 496 

 fathoms, bottom temperature 44. 5 F. 



In addition to the published description it may be noted that the 

 basal edge of the wall is thin. There seems to be a very thin cal- 

 careous lining in the chitinous base. 



Cirrus i has subequal, rapidly tapering rarni. In cirrus ii the ante- 

 rior ramus is obtuse and a little shorter than the other. The caudal 

 appendages are as long as the first joint of the pedicel of cirrus vi, 

 0.6 mm., and one-fifth as long as cirrus vi. Penis is 0.5 mm. long. 

 The posterior cirri have segments with three pairs of spines, the 

 distal pair very long. 



Verruca longicarinata Gruvel, from the Sargasso Sea in 3,432 meters 

 depth, resembles V. JioeJci, but differs by having two contiguous, pro- 

 jecting, articular ribs on the movable scutum; the movable scutum 

 and tergum are larger and narrower; the shape of the fixed scutum is 

 different; and the suture adjoining the fixed tergum is sinuated, not 

 straight as in V. JioeJd. 



V. olliqua Hoek, F. erecta Gruvel, and F. plana Gruvel also belong 

 to the same group of small, compressed, inornate species. 



VERRUCA RATHBUNIANA, new species. 

 Plate 7, figs. 2, 2a, 2b. 



Type. Cat. No. 11026, U.S.N.M. 



Type-locality. Albatross Station 2572, southeast from Cape Cod, 

 40 29' north; 66 04' west, in 1,769 fathoms, gravel ooze; bottom 

 temperature 3 7. 8 F. 



