432 Dll. J. G. DE MAN ON CRUSTACEA CHJEELT 



Measureme?its in millimetres. 



Leugth of tlie body from the tip of the rostrum to (J . ^ . $ , 



the end of the telson 46 46 40 



Length of the carapace 15 15 13 



Length of the larger cliela 28'5 31 



Greatest breadth of the palm of the larger cheha . . 8 9 



Length of the fingers 10 10 



Length of the smaller chela 34 35 16'5 



Greatest breadth of the palm 3'75 4-25 2 



Lengtli of the fingers 16 15"5 9-5 



Geographical JDlstribnlion.—Lat 34° 6' N., long. 136° 15' E., at 11 fathoms ; lat. 

 35° r N., long. 136° 55' E., at 3 fathoms (Miers) ; off Yokorka, Japan, in from 5 to 

 20 fathoms, and off Kohe, Japan, depth 8 to 50 fathoms {Speiice Bate) ; Bay of Tokyo and 

 Tanagava, Japan (Ortmann). 



PEN^US, Fabricius. 

 Pen^tjs (MetapenvEUs) lamellattjs, de Haan, 



PencPMS lamellatus, de Haan, Fauna Japonica, Crust. 1849, p. 193, tab. 46. figs. 4 & 5. 



Pemeus lamellatus, Miei's, in Proc. Zool. Soc. 1878, p. 308. 



Penmus lamellatus, Kishinouye, in Journ. Fish. Bureau, Tokyo, vol. viii. no. 1, 1900, p. 25, pi. 6. 



fig. 1. 

 ParaperKBus lamellatus, Eathbun, in Proc. U.S. Nat. Museum, xxvi. 1902, p. 38. 



One adult female from the Inland Sea of Japan. 



This beautiful specimen is 75 mm. long from tip of rostrum to the end of the telson. 

 The upper margin of the rostrum, which, extending just beyond the eyes, reaches as far 

 forward as the first joint of the antennular peduncle and as the setose scale or 

 l^rosartema, carries nine teeth ; of these the first is placed immediately before the 

 middle of the carapace and the fifth above the frontal margin; the second is almost 

 as far from the fifth as from the first. When this female is compared with a 

 typical male from the Leyden Museum, lying before me, the lower margin of the 

 rostrum appears to run, in the Leyden type, a little more oblique than in the female, 

 and this is also the case with the teeth of the upper margin, especially with the first 

 and the second, so that these teeth are in the male a little more erect. I cannot decide 

 whether this is a sexual, a local, or an individual difference. 



The upper margins of the first three teeth of the rostrum and of the carina on the 

 third to sixth segments of the abdomen are marbled with blue and yellow, and the hairs 

 with which the appendages of the body, excepting the eye-peduncles and the upper 

 antennae, are furnished are of a beautiful red colour. 



The external maxillipeds, which reach to the tip of the antennal scales, are provided 

 with an exopodite that reaches almost to the middle of the carpopodite. The perseopods 

 are also all furnished with a well-developed exopodite ; the exopodites of the fifth pair 



