CRUSTACEA MALACOSTRACA. 35 



with marginal hairs. In M. bamffica it is further as if covered with scales almost everywhere, which 

 is due to the presence of numerous large and small, slightly arched tubercles, the convex 

 anterior or outer margin of which is well marked off and provided with hairs (fig. 3 a); in 

 a specimen of only 13 mm. total length, rostrum included, this sculpture is weakly developed. In 

 M. tenuimana the sternum is very shiny and without the scale-formation as in M. bamffica; there are 

 some rows of bristles on a part of the first sternal segment but the scale-like tubercles are rudimentary, 

 and as a rule the second, third and fourth segments are smooth, with altogether extremely few 

 short rows of hairs chiefly out towards the lateral margins; sometimes also we meet 

 with a small number of such rows scattered over the surface of the segments, but the 

 scale-formation, i. e. the raised seemingly imbricate areas, are never developed (fig. 4a). 

 In M. tenuimana the submedian spines on the hind margin of the scutum are not only always present, 

 they are large and directed strongly outwards; the spines on the 2 nd 4 th abdominal segments are 

 large, very prominent and, especially the submedian, considerably larger and more prominent than in 

 any specimen of M. bamffica. In M. tenuimana the bristles on the base of the upper margins of the 

 eyes are short to very short, but cannot ever be said to be quite wanting. The lateral margins of the 

 scutum are less convex than in M. bamffica, the more slender chela are laid stress on by Sars in the 

 choice of the specific name. - - After examining my large material I am quite certain of the inde- 

 pendence of the species M. tenuimana. 



25. Munida microphthalma A. M.-Edw. 



1880. Munida microphthalma A. Milne-Edwards, Bull. Mus. Comp. Zool. Vol. VIII, no i, p. 51. 

 ! 1897. A. Milne-Edwards & Bouvier, Mem. Mus. Comp. Zool. Vol. XIX, p. 32. 



PL II, figs. 913. 

 1900. A. Milne-Edwards & Bouvier, Exp. Scient. du Travailleur et du Talisman, 



Crust. Dec., I, p. 292. 



Occurrence. This species has not been brought home by the "Ingolf", but it was taken by 

 the "Thor" in 1903 at the following locality. 



South of Iceland: 62 10-8' N. L., i936'W. L., 10801144 fm., 2 spec. 



Distribution. The most northerly place in the Atlantic at which this species had previously 

 been taken was 45 39' N. L,. in the Bay of Biscay ("Talisman"). It was foimded on specimens taken in 

 the West Indies by the "Blake"; the "Challenger" took it near Ascension and north of Kermadec Islands 

 in the Pacific. With some uncertainty a specimen taken by the "Albatross" at Cocos Islands in 134 fm. 

 is ascribed to it, and the French authors cited consider it most probable that M. microps Alcock of the 

 Indian Ocean is a variety of the same species, but in 1901 Alcock maintains his M. microps as an 

 independent species "very closely related to M. microphthalma A. M.-Edw." The greatest depth at 

 which even the main form is known to have been taken is 804 fm., so that the depth given by the 

 "Thor" is not a little larger. 



26. Galacantha rostrata A. M.-Edw. 



1880. Galacantha rostrata A. Milne-Edwards, Bull. Mus. Comp. Zool. Vol. VIII, no i, p. 52. 

 1884. S. I. Smith, Bull. Mus. Comp. Zool. Vol. X, p. 21, PI. IX, figs. 22 a. 



5* 



