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



Chloridella fasciata (de Haan). 



Squilla fasciata, de Haan, Fauna Japonica, Crust. 1849, p. 224, tab. 51. fig. 4. 



Chluridella fasciata, Rathbun, in Proc. U.S. Nat. Museum, xxvi. 1902, p. 54 (ubi synon.). 



Two specimens from the Inland Sea of Japan. 



This species seems to be rare, for neither Miers in 1880 nor Bigelow in 1891, when 

 describing this species, had specimens of it at their disposal, whereas only two were 

 collected by the ' Challenger ' Expedition, also in the Inland Sea of Japan. 



The present specimens are respectively 51 mm. and 40 mm. long from the tip of the 

 rostrum, to the end of the telson, about as long as those that were described by Brooks ; 

 de Haan's single type specimen was 5 centiin. long. The eyes are described by Brooks 

 as " nearly cylindrical" ; in our specimen, 40 mm. long, the peduncle and still more the 

 corneal axis are distinctly somewhat compressed, and the latter, which is directed somewhat 

 obhquely as in Chlor. affinis, Berthold, measures 0"045 of the length of the body. 



The spiniform teeth at the antero-lateral angles of the carapace are directed a little 

 outward and reach almost as far forward as the suture between carapace and rostrum. 



The tooth on the middle of the outer margin of the inner spine of the basal prolonga- 

 tion of the uropods is obtuse, though not rounded, and the inner border is armed with 

 twelve or thirteen sharp teeth, which slightly increase in length distally ; the ' Challenger ' 

 specimens presented here only seven or eight teeth. The terminal paddle of the 

 exopodite measures two-thirds the length of the first joint, the outer margin of which 

 is furnished with eight movable spines, which increase in size and in length distally. 

 According to Brooks, the paddle measured in the ' Challenger' specimens half the length 

 of the proximal joint. The length of the telson, measured in the middle line, is three- 

 fourths its greatest width. The median crest, which ends posteriorly in a sharp tooth i 

 carries a small notch at one-fourth of its lengtli from the base. Between the marginal 

 spines are observed on each side one lateral, eight intermediate, and four or five sub- 

 median denticles, which are all very sharp. There are, in the smaller specimen, on the left 

 side five, on the right four submedian denticles. According to the label, this species 

 presents a red colour above; in the larger specimen the carapace aad abdominal terga 

 are mottled with minute dark points. 



Geographical Distribution. — Japan {de Haan) ; Inland Sea of Japan, depth 15 fathoms, 

 bottom blue mud {Brooks). 



B.— LAKE AT YUNNAN-FU, CHINA. 



POTAMON, Savigny. 

 Parapotamon, nov. subgen. 



A new subgenus Farapotamon is proposed for those Potamonidse that present the 

 general characters of JParathelphusa, but in which the fingers of both chelipeds are 

 spoon-shaped, excavated at the tips. In the typical species of Parathelphusa, Farath. 

 tridentata, H. M.-Edw., and Parath. sinensis, H. M.-Edw., the fingers are distally acute, 

 pointed, and the other species of this subgenus seem to agree with them as regards this 

 character. In the remarkable nevr species of Eiver-Crab from "i'unnan, however, that 



