THE BARNACLES TN THE V. S. NATIONAL MITSEUM. 



37 



Rican type, ratber densely liairy, and ditier from typical **>, portori- 

 caninn somewhat in shape. The eapitula measure 1>.5, 9.7, and 7 mm. 

 long. The oceludent margin of the scutum is distinctly convex, that 

 of the tergum straight or even a trifle concave. The summit is 

 erect, not recurved. The inframedian latus is longer and narrower 

 than in S. poi'torlcanmn. The rostrum is narrower. The umbone.s of 

 the carinal latera project less and are situated higher. The valves 

 are sculptured with concentric grooves at subeipial intervals. The 

 two larger examples ai'e evidently adult. (Fig. S <1^ e.) 

 In the figure the hairs of the cuticle are omitted. 



SCALPELLUM LONGICARINATUM, new species. 



Type.—Q^t. No. 11534, U.S.N.M. 



Type 'locality. — Alhatro,^s Station 2668, ofl" northern Florida, north 

 latitude 30^\5S' 30". west longitude 70'"^ 3S' 30", 29-1 fathoms. 



Fig. 9.— SrAi.PELi.rM i.oNGirARiNATi'M a, lateral view; /), carinal view; c, rostral view x 5. 



Other localities. — Cat. No. 14557, U.S.N.M. Albatross Station 2415, 

 north latitude 30- 44', west longitude 79' 26', 440 fathoms. Cat. No. 

 14560, U.S.N.M. Alhatros.^ Station 2(J63, north latitude 29- 39', west 

 longitude 79° 49', in 421 fathoms. Bottom temperature 42.7°F. 



The capitulum is long-oval, widest in tin* middl«\ both margins con- 

 vex, l)ut the ventral border is less curved than the dorsal. Composed 

 of 14 fully calcified valves. Cuticle thin, sparsely hairy. Sutures 

 linear. The plates are closely and rather strongly sculptured with 

 unequal lines of growth, with strong grooves at intervals. 



The scutum is trapezoidal, the length more than twice the breadth. 

 The oceludent margin is convex, the apex acuminate and recurved 

 within the ventral outline, overlying the l)ase of the tergum. The 



