new Ilvterotuiiais a id a new Eurydicc. 1G9 



particulars, hut tlio tliu:nl) of the chelipeJ i.s of widely 

 ilitriMoiit form. 



Ilah. Prociirod by Mr. Robert Gurney at Six-mile House, 

 on the Biire, ami also at Reedham, on the Yare, Norfolk. 



llcterotunnis Orstcdl (Krfjyer). 

 (IM. VI. Hgs. 2, 3.) 



1S42. Tanais Orstedi, Kriiyer, Natiirhist. Tidssk. vol. iv. p. 183; 



Voyairi'3 eii Seuiid. Sec. pi. xxxi. ligs. 3 a-l. $. 

 1842. Tanais curculio, Kroyer, /. c. p. 184; Voyages See. pi. xxx. 



figs. 4«-/j. cf • 

 185l'. Tiinais balticiis, Friedrich Miiller, " Tanaia rhynchites and halticus 



neuo Arten nus der O^tsee," Archiv f. Naturg. 18 Jahrg. p. 89. $. 

 1852. Tanais rhynchitvs, Friedrich Miiller, /. c. p. 88. (f . 

 1890. Tanais Orstedi, G. O. Sars, Crust. Norway, II. Isopoda, p. 14, 



pl.vi. 6 2- - r r 



In this species the thumb or " posteriorly-pointin:^' lappet^' 

 of the ehelipcd of the male is narrow at the base, and widening 

 thence in clavate form has the extremity truncated, with a 

 little notch near the anterior corner. It is similarly repre- 

 sented in the figures of Kroyer, Miiller, and G. O. >Sar3, and 

 the figures given by Miiller are here reproduced (PI. VI. 

 figs. 2, 3) for comparison with the better-known illustra- 

 tions of Sars. These drawings will show how much this 

 appendage differs I'rom that of H. Gurneyi. 



Ileteroianais Orstedi is recorded from Uresund {Kroyer) ; 

 Baltic, at Landskronaand Westervic {LiUjehorg) ; Prussia, at 

 Grcifswalde (Miiller) ; Bohusliin [Lilljebory) ; Christian- 

 sand {Boeck) ; and Iddotjord, at Fredrikshald, Norway 

 {G. 0. >S<irs). Specimens in my own collection are from 

 Landskrona {Lilljebory) and Denmark (from Copenhagen 

 Museum). 



Genus EuRYDiCE, Leach. 



Eurydice rotundicauda, sp. n. 

 {m. VI. figs. 4-7.) 



Antcnnulcs a little shorter than the peduncle of the an- 

 tennte; flagellum consisting of four articulations, combined 

 length of the three distal slightly less than that of the first, 

 which is wholly devoid of the dense covering of downy setae 



Ann. <0 Mag. N. Ili'st. Ser. 7. Vol. xvii. 12 



