The Annals and magazine of natural history; zoology, botany, and geology . g as wideat base; umbo apical, entering between terga, roof slightlyconvex, without marginal ridges, parietes very narrow, atright angles to roof, base rounded or angled. Upper latus withtergal margin convex and scutal margin concave, so that theacute apex is turned forwards ; carino-basal margin convex,forming an almost even curve. Rostrum very small, trian-gular, separating the rostral latera. Rostral latus low, withan oblique ridge from the umbo. Inframedian latus trian-gular, nearly equilateral. Carinal latus shaped
The Annals and magazine of natural history; zoology, botany, and geology . g as wideat base; umbo apical, entering between terga, roof slightlyconvex, without marginal ridges, parietes very narrow, atright angles to roof, base rounded or angled. Upper latus withtergal margin convex and scutal margin concave, so that theacute apex is turned forwards ; carino-basal margin convex,forming an almost even curve. Rostrum very small, trian-gular, separating the rostral latera. Rostral latus low, withan oblique ridge from the umbo. Inframedian latus trian-gular, nearly equilateral. Carinal latus shaped much as inS. regina, but with umbo closely appressed to, and not pro-jecting behind, the carina (tig. 4, B). Peduncle about as long as capitulum, with large over-lapping scales arranged in 10-12 rows of 11-13 scales each. Ann. & Mag. N. Hist. Ser. 9. Vol. i. 8 114 Dr. W. T. Caiman on Mandible ( 4, C) with four teeth, interval between thetwo distal only a little greater than that between second andthird. Cirri purplish, lighter towards the tip. Rami of Fiff. Scalpellum regulus, holot\ pe. A. Lateral view, with cuticle removed from capitulum. B. Base ofcarina and carinal latera. C. Mandible. D. First cirrus (setasomitted). E. Base of sixth cirrus and caudal appendage. first cirrus (fig. 4, D) with 8 and 12 segments, exopod notvery slender distally. Sixth cirrus with about .50 segmentsin exopod, with five pairs of spines on middle segments. Barnacles of the Genus Sealpellum. 115 Caudal appendages (fig. 4, E) equal to or a little longer thanpeduncle of sixth cirrus, of 4 or 5 segments. Penis absent. Measurements.—Length of capitulum 36 mm., breadth22 nun. ; length of peduncle 35 mm., diameter 13 mm. Remarks.— Regarding only the characters of the capitularplates, the differences separating this species from ,S. reginaare so little marked as hardly to suffice for the discriminationof the species. The most important, perhaps, are the formof the upper latus, with its acut
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