ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 297 



reminds us strongly of the paw and claws of one of the Felidae, hence 

 the generic name which I have chosen. Frequent in Shetland, and 

 sometimes occurring in immense numbers in rock -pools which are only 

 reached by the sea at high spring-tides ; under such circumstances I have 

 taken it at the Out Skerries, Shetland, and near Marsden, on the coast 

 of Durham. I have dedicated this species to that excellent carcinologist 

 Professor Lilljeborg. 



TJialestris longimana, Claus, Die frei lebend. Copep. p. 130, pi. xviii. figs. 1-11. 

 Among Laminariae, Bressay Sound. 



Helgolandica, Claus, Die frei lebend. Copep. p. 131, pi. xvii. figs. 12-21. 



Bressay Sound. 



harpacticoides, Claus, Die frei lebend. Copep. p. 133, pi. xix. figs. 2-11. 

 Hillswick, among weeds, 1867. 



Clausii, n. sp. Rostrum short, blunt, not as long as first joint of an- 



tenna3. Gnathopod (lower footjaw) having inner margin of hand 

 straight, smooth, outer strongly arched ; finger not quite as long as hand, 

 much curved at the extremity. First feet with the branches shorter and 

 stouter than usual, subequal in length ; outer much stouter than inner, 

 its inner margin glabrous, except three or four cilia close to the base, 

 outer margin ciliate ; a large lanceolate, ciliated spine on the peduncle ; 

 a spine at distal extremity of first, and another near the extremity of 

 second joint, which is only about twice and a half as long as broad ; 

 last joint with three terminal spines and a seta, the innermost spine 

 more slender than and about half as long again as the next: inner 

 branch much more slender than outer, 2-jointed ; first joint long, margins 

 glabrous, inner with a seta rather nearer to the base than to the ex- 

 tremity ; second joint terminating in two claw-spines, not very unequal 

 in length. Last feet with the outer branch obovate, margin ciliated, 

 with six setae on the more distal portion of the outer margin and the 

 extremity ; the innermost seta the longest, and the two following close 

 together, and very much smaller than the others : inner branch rather 

 shorter than outer, five setae on distal portion of inner margin and at 

 the extremity, ciliated between the setae, and the seta nearest the base 

 plumose ; the setae not differing greatly in length, but the third rather 

 the longest. Caudal laminae with five setae, which are peculiarly 

 swollen at the base ; the innermost but one the longest, the next half 

 its length, the others very short, spine-like. In the male the abdominal 

 segments have rows of spinules on the sides ; the external branch of the 

 last feet is narrow, with seven setae, of which the innermost but one is 

 much the longest, and the next is minute; the caudal setae are not 

 swollen at the base. First feet as in the female. Found among Lami- 

 nariae in Bressay Sound, 1867 ; and also at Tobermory, in the Isle of 

 Mull, in 1866. I have named this species after the author of the 

 beautiful work, so often referred to here, on the free-living Copepoda. 



llarpacticus chelifer (Miiller). Bressay Sound. 



Po.'cellidium dentatum, Claus, Beitriige zur Kenntniss der Entomostraken 

 (1860), p. 8, pi. ii. figs. 19-22 ; Die frei lebenden Copepoden, p. 140, 

 pi. xvii. figs. 2-5. Among weeds, Hillswick and Lerwick, abundant. 

 fiinbriatum, Claus, Die frei lebenden Copepoden, p. 140, pi. xvii. fig. 1. 



Hillswick and Lerwick. 



subrotundum, n. sp. Short, broad, nearly as broad as long ; cephalo- 

 thorax subtruncate in front ; antennae short, not reaching the sides of 

 cephalothorax, Caudal laminae as broad as long, truncated distally ; 



