Memoirs of the Museum of Comparative Zoology at Harvard College Volume 35

Memoirs of the Museum of Comparative Zoology at Harvard College Volume 35

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...lower margin a little irregularly emarginate; fourth and fifth segments each with a dorsal spiniform denticle; sixth segment uncommonly short and deep. The inner ramus of the uropods conspicuously shorter than the outer which reaches a little beyond the tip of the telson.--Telson has in Sars's type seven pairs of dorsal spines (it is mutilated in my adult specimen). The copulatory organs (Plate 4, figs, le-lh) show some peculiarities. The spine-shaped process (p1.) is moderately curved. The terminal process (p.) is medium sized, seen from behind (fig. If) considerably curved at the middle, with the convex margin outwards and with the end compressed; seen from the inner side (fig. lg) the proximal half is besides a little curved, while a somewhat short terminal part of the distal half is a little widened, very oblong, subacute and bent to the left. The proximal process (p3.) overreaches considerably the terminal; it is proportionately not thick at the base and tapers gradually towards the other obtuse end; its distal third is very slender; it is curved somewhat inwards at the end of its proximal fourth, while its distal half constitutes a portion of a circle with the convex margin inwards. The median lobe (1m.) is long and about its distal fourth is nearly lamellar; this lobe is produced distally with the tip rounded, and the lamellar part is bent inwards, covering, seen from behind, the distal part of the lateral process. This process (p4.) is very long, a little curved to the beginning of its terminal fifth, which is much curved inwards and especially forwards and in reality considerably longer than seen on the figures (figs. le and lh) as these do not exhibit the process from the inner side. The additional process.(fig. lh, which more

Product details

  • Paperback | 146 pages
  • 189 x 246 x 8mm | 272g
  • United States
  • English
  • black & white illustrations
  • 1236810287
  • 9781236810281