20 CRUSTACEA MALACOSTRACA. 



Naples, between Stromboli and Messina, the Adriatic, from 266 — 372 fm. to 800 frn. (several authors). - 

 We may summarise the data 011 its bathymetric distribution by saying, that it occurs in depths 

 between 250 and 800 fm. ; in the Danish waters isolated specimens are met with at intervals of many 

 years in much smaller depths, certainly even as low as between 20 and 30 fm. 



Remarks. The specimen taken by the "Michael Sars" is a small female, with carapace 25 mm. 

 long. Comparing this with a female (and a male) of the same size of G. longipcs A. M.-Edw. from 

 the Gulf of Gascogne, I have come to the conclusion that there is absolutely no difference between 

 the specimens; then I compared all three with a specimen of G. tridens Kr. from Norway: a male with 

 carapace 53 mm. long, and found that the differences noted by Milne-Edwards & Bouvier between 

 G. tridens and G. longipcs do not hold good. Senna came to a somewhat similar result, but the 

 differences in the mouth-parts mentioned by him are also not maintainable and quite worthless as 

 specific characters. I consider it quite certain that G. longipcs A. M.-Edw. is only a synonym of the 

 old species of Kroyer. 



11. Cymonomus Normani Lankester. 



PI. I, figs. 2 a— 2 i. 



1904. Cymonomus Normani E. Ray Lankester, Quart. Journ. Micr. Sc. Vol. 47, New. Ser. p. 456, PI. 33, fig. 1, 



PI. 34, figs. 8, 10, n. 



Occurrence. There is only one specimen from the "Ingolf" expedition, but later the "Thor" 

 has twice taken this remarkable form. 



South-West of Iceland: St. 73: 62° 58' N. L., 23°28'W. L., 486 fm., temp. 5-5°; 1 spec. 



South of Iceland: 62° 57' N. L., 19 58' W. L., 509 fm., "Thor" 14. VII. 1903; 1 spec. 



South-West of the Fseroes: 6i° 15' N. L., 9 35' W. L, 516 fm., "Thor" 22. V 1904; 1 spec. 



Distribution. The species was only known previously from two places south-west of the 

 last-named locality, namely, in the warm area south of the "Wyville Thomson Ridge" at ca. 59V2 N. L. 

 in 542 and 705 fm. 



Remarks. The species has been described and richly illustrated in the paper mentioned of 

 Lankester. Before this was prepared I had drawn some figures of the single and very defective 

 specimen of the "Ingolf"; a copy, in outline, of one of these figures is introduced in Lankester's 

 paper (fig. 12 on p. 459) with some remarks. I have thought it of no use to give a detailed de- 

 scription of the species, as the differences between it and the C. granulatus Norm, fully described by 

 A. Milne-Edwards & E. L. Bouvier have been indicated by Lankester. I have however drawn the 

 anterior margin of the carapace and the eye-stalks of all my three specimens in order to show, that 

 there is some variation between them in the reduction of the rostrum, in the form of the eye-stalks 

 and in the size of the lateral corner-processes. In all my specimens the eye-stalks diverge a little 

 from one another at the anterior margin of the head — they are not, as Lankester states, "immovably 

 united to the margin of the carapace", as the anterior margin of the carapace is quite free above the 

 skeleton of the head; figs. 10 and 11 on PI. 34 of Lankester's paper likewise show that there is some 

 distance between the roots of the two eye-stalks, and fig. 8 (PI. 34) must undoubtedly be incorrect in 



