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Show G4 DR. n. J. HANSEN ON CRUSTACEANS [Jan. 20, small specimens, but neither of them can be the type for Bate's figure. Both specimens belong to Group II. in my earlier paper, but neither of them belongs to S. armatus, both having on the rostrum a well-developed sub-basal dorsal spine, which is absent in S. armatus Kr. and in Bate's figure. I have been unable to refer the specimens, which measure about 8*5 and 11 mm., to any species known to me, and I thought it useless to describe and figure them.-One specimen from Port Jackson, Australia, the third locality in Bate's report, measures at most 5*2 mm. without the rostrum, which has been broken at the middle, but possesses a very fine sub-basal spine. It is so small and so badly preserved that a reference to any species has been impossible. Finally I found a specimen from " Sidney," determined by Bate as S. armatus, but not mentioned in his work. It is only as long as the preceding specimen and impossible to determine. The result is that I have perhaps not seen the specimen figured by Bate, which may belong to S. armatus Kr., and, according to the explanation of the plate, measured about 10 mm. in length, while his specimens of this length examined by me disagree with his figure by possessing a sub-basal upper spine on the rostrum. S erg. edwardsii Kroyer, Bate, p. 4 0 3 , pi. lxxiii. fig. 2. Bate enumerates three localities. The first is " North Atlantic, April 1873" : in the Museum I found a specimen labelled " 14 April, 73, off Africa, surface," which most probably is that indicated in the text, and it belongs to S. edwardsii Kr. The second locality is " Pacific Ocean, surface, September 1875" : in the collection a specimen bearing the same inscription is S. edwardsii Kr. From the third of Bate's localities, Cape Yerde Islands, I found no specimen, but a specimen without locality and signed " type " is an adult specimen of S. edwardsii Kr. (That Bate's statement " Greenland (Kroyer) " is wrong here, and in almost all other places, has already been pointed out both by Ortmann and myself.)- Furthermore, I found two small specimens of S. oculatus Kr., the Mastigopus of S. edwardsii Kr., which had been determined by Bate as S. edwardsii and labelled " Aug. 23, 1873, lat. 2° 25' N., long. 20° 1' W., 100 fathoms," but these specimens are not mentioned in Bate's Report. Bate's description of the characters of S. edwardsii Kr. is incomplete ; the reader is referred to my earlier paper. S e rg . r in k i i Kroyer, Bate, p. 404, pi. lx x iii. fig. 3. Bate mentions two localities: " New Hebrides, August 23, 1874," and " South Pacific, 1875." From the first of these localities the anterior half of a specimen was present. Furthermore, I found two specimens labelled " Oct. 19, 1875, S. Pacific, drawn," and one and a half specimen labelled " Oct. 18, 1875, surface" : both these localities are in all probability identical with the second one in Bate's Report. It may be very possible that all these specimens belong to S. rinkii Kr., which is the Mastigopus |