34 BULLETIN 93^ UNITED STATES NATIONAL MUSEUM. 



tergal border. The sutural edges of fixed scutum and tergum are 

 not so thickened. The rostrum and carina both have short, curved 

 ribs above the upper articulating ribs, and terminating on the bor- 

 ders of the movable scutum and tergum, while in V. calotheca these 

 are wanting on the carina. The oblong contour of the base in V, 

 alba is probably duo to its seat on narrow spines. V. calotheca, seated 

 on the flat plate of a barnacle, has a normal, broad base. 



VERRUCA CALOTHECA FLAVIDULA, new subspecies. 

 Plate 5, figs. 2, 2a. 



Tyjye.— Cat. No. 32926, U.S.N.M. 



Type-locality. — Albatross Station 2415, off northern Florida, north 

 latitude 30° 44'; west longitude 79° 26', in 440 fathoms, bottom 

 temperature 45°.6 F. (or at Station 2416 in 270 fathoms, bottom 

 temperature 53°.8 F. — material from these two hauls, made in one 

 day, was put together). Also Station 2666, near the preceding, 

 north latitude 30° 47' 30"; west longitude 79° 49', in 270 fathoms, 

 bottom temperature 48°. 3 F., on the coral Aniso'psanmiia profunda 

 Pourtales, with Verruca xanihia. 



The barnacle is very pale yellow or faintly brown outside, dis- 

 tinctly yellow within. The base is subcircular. The walls have 

 simple, thin basal edges; interior without myophore or pit in the 

 fixed scutum. Movable plates slope veiy steeply, about parallel to 

 the plane of the adjacent carinorostral wall (or in some specimens 

 approaching a horizontal position). Apices of the wall-plates 

 project. 



The movable scutum resemble that of V. calotheca, except that the 

 occludent area has two longitudinal furrows, parting three ribs 

 which attain the hinge margin. Interior deeply concave. Tergo- 

 scutal suture nearly straight, as seen from within, except near the 

 apex, where a small tooth of the tergum enters the scutum. 



Tergum as in V. calotheca. 



Rostrum has a scutal area sculptured with several narrow, granose 

 ribs curving toward and terminating on the scutal border. 



Carina with the upper articular rib indistinctly double, but there 

 is no area of short, arcuate ribs above it. 



Carinorostral length between apices 8 mm.; height of fixed ter- 

 gum 5.2 mm. 



Cirri i and ii have rapidly tapering rami, the shorter ramus about 

 three-fom'ths the length of the longer. Cirrus iii is much more 

 slender, with nearly equal rami, the inner one very profusely bristly. 

 Terminal appendage has 14 joints, is three times the length of pro- 

 topod, but less than half as long as cirrus vi. It resembles that 

 of V. Jloridana, and is much longer than in V. calotheca. 



