. Text-fig. 26. Serolis acuminata (a) First pleopod S, x 36. {b) Second pleopod o, x 36. This species fits into the key of the species of Serolis (Sheppard, 1933, pp. 278-82) in the section containing S. cornuta Studer and S. trilobitoides (Eights) (p. 280, BI, CUbz). The species can be readily distinguished from these by its smaller size and by the shape of the terminal segment. Distribution. Ross Sea. Serolis ovata (Text-figs. 27-29) Occurrence. St. 1873: 13. xi. 36, 61° 20-8' S., 54-04'' 2' W., 210-180 m., i ? (non-breeding), the holotype. Description. The single specimen (Text-
. Text-fig. 26. Serolis acuminata (a) First pleopod S, x 36. {b) Second pleopod o, x 36. This species fits into the key of the species of Serolis (Sheppard, 1933, pp. 278-82) in the section containing S. cornuta Studer and S. trilobitoides (Eights) (p. 280, BI, CUbz). The species can be readily distinguished from these by its smaller size and by the shape of the terminal segment. Distribution. Ross Sea. Serolis ovata (Text-figs. 27-29) Occurrence. St. 1873: 13. xi. 36, 61° 20-8' S., 54-04'' 2' W., 210-180 m., i ? (non-breeding), the holotype. Description. The single specimen (Text-fig. 27) on which this species is based is a female in the non-breeding phase, measuring 13 mm. in length and slightly over 10 mm. in greatest breadth; it is broadly ovate in outline and compact in form. The head is broadest anteriorly where the width is twice that of the length; a very small median rostral process is present, on either side of which the anterior margin is slightly excavated in the region of the base of the antennule. A curved transverse ridge extends from just behind the rostral process and dies out on the coxal area of the second thoracic somite; behind this, and in front of the eyes, the head is raised into a somewhat pitted area which is
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
