402 DE. J. G. DE MAN ON CEUSTACEA CHIEFLY 



Geographical Distribution. — Cliinese Sea, lat. 23°, depth 16-25 fatlioms, bottom sandy 

 or muddy {Stimpson); Corea Channel, lat. 34° 8' N., long. 126° 24' E., at a depth of 

 24 fathoms {Iliers) ; Maizuru, Japan [Ortmann). 



GALATHEA, Eabr. 

 Galathea acanthomera, stimpson. (PI. 31. figs. 14, 15.) 



Galathea acanthomera, Stimpson, in Proc. Acad. Nat. Sci. Philadelphia, 1860, p. 252. 

 Galathea orientalis, Ortmann, in Spengel, Zool. Jahrb., Syst. vi. 1892, p. 252, tab. 11. fig, 10 (nee 

 Stimpson). 



One male from the Inland Sea of Japan. 



Through the kindness of Prof. Doderlein, of Strassburg, some specimens of Ortmann's 

 Galathea orientalis from Kadsiyama, Japan, are lying before me, and though they show 

 a few slight differences, especially as regards the rostral teeth, they belong no doubt to 

 the same species as ovir specimen from the Inland Sea. As will appear from the 

 following description, this species ought to be referred to Gal. acanthofnera, Stimpson, and 

 not to Gal. orientalis of the same author. 



The carapace of our male is 7'2 mm. long and 5 mm. broad. The rostrum measured 

 from the tip to a transverse line uniting the bases of the first, i. e. the posterior teeth, 

 appears to be 2'7 mm. long and 1'5 mm. broad at its base ; in a male frf)m Kadsiyama 

 of the same size the rostrum is 2'55 mm. long, but just as broad as the other. The 

 length of the rostrum and its relative breadth are thus somewhat variable. The lateral 

 teeth of the rostrum are all acuminate and pointed. The first or basal tooth is, in the 

 male from Kadsiyama, directed straight forward and measures just one-third of the second, 

 which is slightly turned inward, its outer margin being a little curved ; the third tooth, 

 one-third longer than the second and therefore the longest of all, and also the fourtli, which 

 is just as long as the second, are directed straight forward ; the terminal spine, finally, 

 measures two-fifths the whole length of the rostrum, is once and a half as long as the 

 fourth lateral tooth, and its lateral margins carry a few, six or seven, microscopical teeth 

 and some setse. In another specimen the third and the fourth lateral teeth are nearly of 

 equal length and the fourth is slightly turned outward. In an adult female from 

 Kadsiyama the second tooth is also directed straight forward and its outer margin 

 straight, not curved inward. 



In the male from the Inland Sea the first tooth measures a little more than one-third 

 the length of the second and is turned slightly outward ; the second tooth projects straight 

 forward and its outer margin is straight ; the third is once and a half as long as the second, 

 which is almost as long as the fourth, the third and the fourth being both directed straight 

 forward. Length and shape of the rostral teeth are thus somewhat variable. Imme- 

 diately posterior to a transverse line uniting the base of the incisions between the first 

 and second lateral teeth, one observes, in the middle, two spines near together ; these 

 spines are, in the male from the Inland Sea, a little shorter than the basal teeth of the 

 rostrum, they are twice as far distant from one another as they are long and a little 

 farther distant from the basal teeth than from each other. 



