. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. I IRRIPED1 \ I HOB I M \ conditions bave I?»-«-1 > observed by Pilsbry (1907) in tin' group lit' Si illp, Hum VI I'll Abdominal appendages are wanting, and no penis was obsen ed Labrum (fig. 1, b) is bulky and somewhat protruding, al- though loss -o than in tin- groups "I' Sriil/ii Hum Seal /nil u m and Scalpellum .iii in mn. The tnnei (oral) side of the labrum Lb smooth, without teeth or bairs. Palpae i Lium-sized. Mandible (tin. 1. c) with three equidistant acute teeth and a comp
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. I IRRIPED1 \ I HOB I M \ conditions bave I?»-«-1 > observed by Pilsbry (1907) in tin' group lit' Si illp, Hum VI I'll Abdominal appendages are wanting, and no penis was obsen ed Labrum (fig. 1, b) is bulky and somewhat protruding, al- though loss -o than in tin- groups "I' Sriil/ii Hum Seal /nil u m and Scalpellum .iii in mn. The tnnei (oral) side of the labrum Lb smooth, without teeth or bairs. Palpae i Lium-sized. Mandible (tin. 1. c) with three equidistant acute teeth and a comparatively long underpart terminating in an angle armed with a row af powerful bristles or slender spines. Neai the middle of this row there is a small incision, or notch, and on the outer side of this one more powerful spine is seated. These finer details may be accidental, but nothing definite can l»- said at present. First maxilla (fig. 1. d) seems to hold an aberrant position within the genus: the lower one-third or a little more of the cutting i'd".r is slightlj protruding. The bristles of this lower, protruding part are comparatively long and slender, mostly paired, but in the middle one unpaired and very powerful spine is placed. Between the protruding part and the very strong, uppermost spine the cutting edge is furnished with a row of brist- les, the median ones arranged in pairs. Second maxilla of the common type, its distal segment rather triangular in lateral view. Pilsbry (1907) characterizes ScalpeUum longicarinatum as "a robust little species" and says that the largest specimen from the type locality had a capitulum "fully 11 mm. long". He did not give any details of the finer structure of his specimens, and it is not certain whether he had fully grown animals before him; his material came from three different stations of the American "Albatross" expeditions in Atlantic waters. Group of Scalpellum striolatum. According to Gruv
Size: 1309px × 1909px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
