THE BARNACLES IN THE U. S. NATIONAL MUSEUM. 



11 



Scalpellwm trisplnosuni Hoek" is somewhat raore nearl}' related to 

 S. eos^ but differs by the projecting- summits of the scuta and carina, 

 the smaller rostral latera, and the shortly villose cuticle. 



The rostrum and subcarina seem to be very f requentl}^ asymmetrical 

 in the section Calantiai.. In the smaller of the twocotypcs of 8. eox 

 the rostrum is strongly bent toward the right side and the subcarina 

 slightly so. In the larger specimen the subcarina is slightly bent 

 toward the left, the rostrum being symmetrical. Neither of them 

 shows any trace of a subrostrum, such as is developed in 8. villosum. 



SCALPELLUM SUPERBUM, new species. 



Type.—C2iL No. 11525, U.S.N.M. 



Type-locality. — Albatross Station 2669, north latitude 31° 09', west 

 longitude 79° 33' 30", between the Bahamas and Cape Fear, North 

 Carolina, in 352 fathoms, on a branching white coral. Bottom tem- 

 perature 43.7°. 



a c 



Fig. 3.— Scalpelhim superbum. a, ventral, &, lateral, and c, dorsal views of the type- 

 specimen. (Nat. size.) 



Other localities.— ^o. 9920, U.S.N.M., Station 2415, north latitude 

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

 45.6°, on branching white coral. 



The capitulum is somewhat triangular, like that of 8. trispinosu'm 

 Hoek, wide and thick at the base, composed of 13 strong white plates, 

 without perceptible cuticle. The plates are sculptured with radiating 

 .strife crossed by grow^th-lines. 



The scutum is pyramidal with recurved apex, and has a strong 

 median ridge from the apex to the middle of the lower margin. 

 Radiating striae are fine and well developed on the lateral half of the 



« Challenger Report, VIII, Cirripedia, p. 72, pi. vi, figs. 15, 16. 



