368 Annals of the Soutli African 



points : " The rostrum is acutely triangular and short, about 

 one-fourth the length of the remainder of the carapace. A 

 slight but well-marked median carina runs backwards for 

 about two-thirds of the way to the cervical groove, and carries 

 a single blunt spine near its beginning. The margins of the 

 rostrum are spinou, having five teeth on either side in its 

 free portion and two more on their continuation backwards 

 as ridges over the carapace, where they extend as far as the 

 level of the termination of the median carina, enclosing a 

 horseshoe-shaped space. The gastric area supports three 

 small spines on either side arranged in a longitudinal row, 

 midway between the median carina and the continuation of 

 the rostral margins." He also mentions that the telson has 

 a couple of minute spines along the outer border. 



1902. C. I, McArdle, Illustrations Zool. E.C.M.S. Investigator, 

 pi. 57, figs. 2, 2a. 



1905. C. I., MacGilchrist, Ann. Nat. Hist., Ser. 7, vol. xv., p. 239. 



Captain MacGilchrist describes another female specimen, 

 more complete and larger ; carapace with rostrum 16 - 6 mm. 

 long, pleon 27 mm., trawled in the Gulf of Oman, between 

 700 and 689 fathoms. In this " The median carina running 

 backwards from the rostrum carries a large procurved acute 

 spine in the anterior part of the gastric region." "The 

 margin of the rostrum has 4 or 5 spinelets in front of a basal 

 spine on either side of its free portion, and on the continuation 

 backwards of the rostral margin on each side the spines vary 

 from 2 to 4, and may display a want of symmetry in number 

 and position on the two sides of the same specimen. The 

 spines lying between these and the median carina similarly 

 vary from 2 to 3 in number." " The telson has a fair-sized 

 terminal spine with an upcurved tip." 



1910. C). /., Stebbing, S.A. Crustacea, pt. 5. 



No. 71 was obtained by Dr. Gilchrist from a depth of 

 250 fathoms, 457 m., Table Mountain N. 79 E. 40 miles. In 

 this specimen the median carina carries no tooth either blunt 

 or acute, the very acute rostrum has four denticles on either 

 side, not quite symmetrically arranged, and these are followed 

 by five teeth on the left and four on the right side of the 

 horseshoe arrangement on the carapace, between these sets 

 and the median carina a line of two teeth occurring on each 

 side, with the hinder tooth on the left poorly developed. The 

 telson has a little straight tooth in the small median emargi- 



