356 REV. T. R. R. STEBBIXG ON KEW SPECIES OF AMPHIPODOUS 



not very dissimilar, but the fourth and fifth together are a little longer than the second. 

 The length of the limb is equal to that of the first five joints of the third pereeopods. 

 The sixth joint is longer than in that pair. 



Fifth permofods. The slender, unarmed limbs are about two-thirds the lengtli of tlie 

 fourth perseopods, which they much resemble in the proportions of the joints. The 

 finger is minute, apparently hooked. 



Pleopods. The peduncles are strong. The two coupling-hooks are minute, with 

 three pairs of backward-directed points to each. The slender rami have seven or eight 

 joints with the usual setae, and the cleft spine on the first joint of the inner branch. 



TJro2}ods. These are subequal to one another and lialf the length of the first antennae. 

 No outer ramus could be distinguished in the first pair ; the second have a very small 

 one, little more than a quarter the length of the coalesced inner branch, which is itself 

 not quite a fifth of the total length of the uropod. The third pair are slightly the 

 shortest. The outer branch is fully two-thirds the length of the inner, which is a fifth 

 of the total length of the uropod. The first and third have spines on both margins, 

 the second appeared to have them only on the outer margin. The outer branch ot the 

 third pair has spines on the inner margin. 



The length is half an inch, the first antennae measuring one-fifth of an inch, the body 

 nearly the same, and the uropods a tenth. 



The specific name, from the Greek aTevo-wovc., meaning narrow-footed or narrow- 

 legged, speaks for itself. 



Habitat. Atlantic. Lat. 7° 1' 1" N., long. 15° 54' W. Taken in the daytime from 

 a depth of 100 fathoms. 



Of species liitherto described not one makes any very near approach to the present, 

 unless possibly Dana's Chjdonia loiujipes from the Pacific, but even in that the uropods 

 are entirely diff'erent. 



SciNA CEDICARPUS, n. sp. (Plate LII. B.) 



The head has the front shallowly emarginate. The perseon is dilated, with tlie last 

 two segments narrowing rather abruptly. The pleon is narrow, and has the fifth and 

 sixth segments coalesced. The telson is small ; owing to its transparence its outline 

 could not be clearly discerned. 



The eyes are small, and pale in spirit. 



The first antennae are equal in length to the peraeon and first three segments of the 

 pleon. They have the usual stout one-jointed peduncle and two-jointed flagellum, the 

 long first joint carrying minute spines on the outer margin and long filaments on 

 the inner. 



The second antennae are folded in a curve across the underside of the head above the 

 mouth-organs. The first three joints are short, the basal one partially soldered to the 

 head ; the fourth joint is not twice as long as tlie third ; the fifth joint is rather longer 



