330 On new Sessile-eyed Crustaceans. 



equal, toojctlier lonjjer than the first ; the fin'^"!r is about two 

 thirds as long as the fifth joint, the slender nail being longer 

 than the base. 



The first and second peraeopods have the joints sliorter and 

 less slender, the first not curved. The hand has a serrate 

 spine on the inner margin near tlie finger, the preceding joint 

 having a similar spine on the outer apex and a longer spine 

 on the inner. In the last three pairs of peraeopods the first 

 joint is a little more dilated, the hand has serrate marijins, 

 and tliere is a group of serrate spines at the apex both of this 

 and of the preceding joint ; the finger has a minute instead of 

 an elongate nail. 



The marsupium is composed of eisrht plates. 



All five pairs of pleopods are well developed in the female, 

 each of the oval rami carrying about thirteen setae, which did 

 not aj)pear to be plumose. 



The uropods have the peduncle about twice as long as 

 broad. The inner ramus consists of two long joints, the first 

 a little longer than the peduncle and the second a little longer 

 tlian the first; the first carries three setas at the apex, the 

 second five or six^ and one on the inner margin a little way 

 above the apex. The outer ramus is narrow, equal in lenirth 

 to the peduncle, the first joint having an apical seta on the 

 outer margin, the second, which is slightly shorter, having 

 two seta3 on the apex. 



The length of tlie animal is about one tenth of an inch. 



Three or four specimens were obtained in August 1890 in 

 the sands at Lee and Woolacombe, North Devon. The 

 species is named in compliment to Professor Lilljeborg, who 

 publislied an important work on the Tanaid;x3 in L864. 



The species Lep(o(jnathia laficandafa, G. O. Sars, was 

 taken in June this year in the Clyde at Kames Bay, while I 

 was dredging in company with Mr. David Robertson, F.L.S. 

 This species is, it seems, new to the fauna of Great Britain. 



EXPLANATION OF THE PLATES. 



Plate XA'. 



Tuhrchestia brifo, sp. n. ffn. 1, c?, first gnathopod of malo ; </"• '-, J t 

 socoud guathoj)od of male ; (/n. 1, J , tii-st <raathopoLl ot fern ile ; 

 (/H. 2, 2 1 sei-oiul irnatliopod of female ; jirpg. I, '2, 3, 4. last two 

 joints of the first, second, third, and fourth peneopods respec- 

 tively ; ur. o, third uropod ; r, telson. 



Plate XVI. 



Lejitoffnafhia LiUjebori/i, sp. n. Dorsal vi^w of the animal, the natural 

 size indicated by the line above, a. s., upper antenna, three ter- 

 minal joints : //. /.. lower autiima ; I. a., upper lip; ;/j. m., parts 



