. Copepoda. Calanoida; Copepoda. COPEPODA II9 second grotip is represented by a longitudinal row of about 20 minute spines; the third group (ef. PI. IV fig. 3 c) consists of 5 fairly long and slender setae placed more forwards, and lateral, and of 2—3 placed more inwards and backwards; the fourth group, which consists of 20—25 fairly strong setae, has a characteristic shape, as it is convex, and has its right and left parts converging towards the middle, and almost touching each other in front; the fifth group is a continuation backwards of the fourth, and consists of about 30 more delicate se
. Copepoda. Calanoida; Copepoda. COPEPODA II9 second grotip is represented by a longitudinal row of about 20 minute spines; the third group (ef. PI. IV fig. 3 c) consists of 5 fairly long and slender setae placed more forwards, and lateral, and of 2—3 placed more inwards and backwards; the fourth group, which consists of 20—25 fairly strong setae, has a characteristic shape, as it is convex, and has its right and left parts converging towards the middle, and almost touching each other in front; the fifth group is a continuation backwards of the fourth, and consists of about 30 more delicate setae. Behind this group an oblique, almost transverse row of short "spines" is observed. Behind the central spot Nr. 3 no transverse row of setae is ob- served, but behind Nr. 4, which is single, two transverse rows of rather delicate setae are observed. The lamina labialis (fig. 3 d), which is distinctly granular, is indistinctly divided into three parts. In front of it, in the middle, is a longitudinal row of short spines on each side, followed by the two areas of acicules, forming a curvature corresponding to the outer row of setae (cf. fig. ic); the latter is single behind, double in front, as a lateral row of shorter setae is found. The arrangement of the spinous areas behind the lamina as well as of the series of hairs on the labial lobes is seen in figs 3 d—e. The intestinal tract is almost straight, with a short restriction between the anterior and posterior divisions, and with a slender coecal sac in front. fo*- Size of male from Thor St. 88 373 mm.; anterior di- vision 2*92 mm.; urosomeo-8i mm. The head has a distinct frontal keel (fig. 3Q, somewhat longer and lower than in the female; the body is rather elongate, and attenuated in front as well as behind. The head and the first thoracic tergite are completely fused; the articular membranes between the thoracic tergites are like those of the females. The anterior division is 3-5 as long as the urosome;
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Keywords: ., bookauthorhansenhj, bookcentury1900, bookdecade1910, bookyear1915
