36 BULLETIN 93, UNITED STATES NATIONAL MUSEUM. 



in the notch.. The apex of the rostrum also is produced somewhat 

 longer than in the others, approaching the form of V. c. flavidula. 

 It is this specimen which causes me to consider lieteropoma a race 

 of V. calotheca, notwithstanding the considerable differences between 

 typical specimens. 



The locality of this race is distant from that of V. calotheca, but 

 the bottom temperatures do not differ much. 



VERRUCA XANTHIA, new species. 

 Plate 6, figs. 1, la, 16. 



Type. Cat. No. 32931, U.S.N.M. 



Type-locality. Albatross Station 2666, off Fernandina, Florida, 

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

 bottom temperature 48.3 F. Seated on a coral (Anisopsammia 

 profunda Pourtales) with Verruca calotlieca flavidula. 



The barnacle is pale yellow, about as wide as long, depressed, the 

 movable plates nearly parallel to the plane of the base. Basal edges 

 of the wall rather obtuse, simple. Myophore in the fixed scutum 

 well developed ; its upper face concave. 



The movable scutum has three articular ribs, two broad and 

 flattened, and a much narrower third or crescentic rib running to the 

 basitergal angle. Inside it is hollowed out under the apical part. The 

 suture between scutum and terguni, as seen from below, has two teeth 

 projecting from the tergiim, one near the apex, the other midway. 



The movable tergum has three articular ribs. 



The fixed scutum is almost smooth externally and has a small 

 radiiform slip on the tergal side. 



The fixed tergum has a large, smooth paries in shape of an equi- 

 lateral triangle, with obliquely grooved aliform triangles on the scutal 

 and carinal sides. 



The carina has five ribs articulating at their ends with those of 

 the rostrum, the upper rib much longer than the others. 



The rostrum has five articular ribs and a group of short arcuate 

 ribs above, terminating on the scutal border. The apex is erect and 

 marginal. Both carina and rostrum have a low callous submargin 

 within. 



Carinorostral length between apices 5 mm. ; greatest diameter at 

 right angles to length 5 mm. ; height of fixed tergum 3 mm. 



Cirrus i has slightly unequal raini tapering and attenuated distally, 

 of 12 joints each. Cirrus ii has rami of 10 and 15 joints, the shorter 

 one three-fourths the length of the longer, both rather profusely 

 spinose. Cirrus iii has subequal, rather profusely spinose rami. Ter- 

 minal appendage of 12 (?) joints, very minute, 1 mm. long. Penis 

 minute, 0.8 mm. long. 



