. Discussion and Description. This new species, which I have named S. mognae- carinoe, from the large and well-developed carina, belongs, like S. liberiim, , to the group of S. velutinum. From this species it is well differentiated by several external and internal characters. In the shape of the carinal latus it is much related to S. regium, Wyv. Thomson, 1873, S. moluccamim, Hoek, 1883, and , Hoek, 1883, of the Challenger Expedition. These species I have studied in the British Museum, and have found them in other characters well separated. In the internal parts this new species di
. Discussion and Description. This new species, which I have named S. mognae- carinoe, from the large and well-developed carina, belongs, like S. liberiim, , to the group of S. velutinum. From this species it is well differentiated by several external and internal characters. In the shape of the carinal latus it is much related to S. regium, Wyv. Thomson, 1873, S. moluccamim, Hoek, 1883, and , Hoek, 1883, of the Challenger Expedition. These species I have studied in the British Museum, and have found them in other characters well separated. In the internal parts this new species differs especially by the single-jointed caudal appendage. In S. regium the appendage is four-jointed (according to Hoek); in S. gigas I found in the type material four to six segments; in S. moluccamim the appendage has five to six segments (Hoek, , 1883, and Nilsson-Cantell, 1927). Female. Capitulum wholly covered by a thick and very hairy cuticle, and this must first be removed before one can study the valves. There are fourteen plates separated by chitinous interspaces, sometimes rather widely as in the larger individuals, especially round the upper latus. The valves are distinctly sculptured by growth ridges and longitudinal radiating lines. Scutum quadrangular, with recurved umbo, occludent margin slightly convex. Tergum triangular, with the apex acute, occludent margin like the others a little convex. Carina very typical, rather broad and regularly arched. Umbo apical. Dorsal roof very convex, without lateral ribs, and merging into the well-developed sides. Upper latus pentagonal, with the umbo at the apex. The scutal margin, which is the longest, hollowed out, the carinal margin convex. Fig. 5. Scalpellummagnae-carinae. <2. Holotype, lateral view (total length 19 mm.), b. Carina. c. Rostrum and rostral latera. d. Paratype (St. 187), lateral view (total length 30 mm.). e. Rostrum and rostral latera.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificexpedition
