Bulletin of the Bureau of Fisheries Volume N . 26 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: ...distal end of the scutum. An arcuate furrow runs upward from this notch. The carina is arcuate and extends upward well beyond the middle of the tergum. It is widest in the middle, and at the base is expanded in a biramose appendage clasping the top of the peduncle, which it half encircles. The peduncle is stout, cylindrical, and circularly wrinkled. Length of capitulum, 6.5 mm., breadth 3.2 mm. Type, no. 32409, U. S. National Museum, from Hawaiian Islands, collected by the Albatross, 1902, attached to a slender gorgonian. This species is more closely related to D. orthogonia Darwin than to any other. It differs from that in the shorter basal portion of the scutum, the simpler shape of the tergum, and the more broadly clasping basal appendages of the carina. Unfortunately the station number was not preserved, so that the exact location can not be given. ALEPAS Rang. Nude, leathery forms, with a single filamentous appendage on each side, and a long, manyjointed caudal appendage. About a dozen species hitherto known are mostly from deep water. The primary division of the genus should be into those forms which have the endopodite or both rami reduced on the fifth and sixth pairs of cirri, and those in which the rami are not reduced and are subequal in all. In A. rex, described below, the fifth and sixth endopodites are so specialized. In A. percarinata they are unreduced and subequal. The forms taken by the Albatross were seated upon large sea-urchin spines and gorgonians on a bottom of fine sand and mud, such as sea urchins ordinarily inhabit. Alepas percarinata, n. sp. PI. iv, fig. 8. The capitulum is irregularly ovate, dorsally carinated, much longer than the slender peduncle, straightened on the occludent margin, without trace of calcareous or chitinous pla...