22 EEV. T. E. R. STEBBJNG — BISCATAN PLANKTON : 



The first gnatliopods have a group of spines at the truncate end of the short fourth 

 joint, the hind margin of the fifth carrying three spines on its proximal half and a 

 group at the apes. The narrower, somewhat tapering, sixth joint has a few spines on 

 each margin, and is produced into a spine-like tooth on each side of the slender finger, 

 which is microscopically hirsute near the middle and has a tiny indent near the apex. 



The second guathopods nearly agree with the first, but are rather longer and more 

 slender, the sixth joint being as long as the fifth, without instead of with the partial help 

 of the distal processes. The brancliial vesicle is not much shorter than the second joint. 



The first and second peraeopods have the fourth joint short but rather broad; the. fifth 

 glandular, svibequal in length to the narrow tapering sixth, but much broader, both 

 being armed with very slight spinules. The finger is short, slender, little curved. 



The third, fourth, and fifth perseopods differ but little one from the other. In all the 

 fourth joint is more tban half as long as the fifth, the fifth is subequal in length to the 

 narrowly tapering sixth, and is not much shorter than the second. The finger in all 

 is slender, little curved, and very short. The fifth pair is not quite so long as the two 

 preceding pairs. 



The pleopods are of the usual character, carrying a cleft spine on the first joint of the 

 inner ramus, this branch being seven-jointed, while the outer branch has eight joints. 



The first uropods have the outer branch more than two-thirds the length of the inner 

 and a very little shorter than the peduncle. The peduncle is serrate on the outer 

 margin, the inner branch pretty strongly and the outer feebly on hoth edges. The 

 second have the peduncle and inner ramus each a little shorter than in the first pair, 

 but their breadth is rather greater, the armature similar, and the (broken) inner ramus 

 is indicative of a like proportional length. The third pair are the shortest ; they have 

 a broad peduncle with smooth margins. The strongly tapering inner ramus is a little 

 longer than the peduncle, faintly serrate on the outer margin ; the outer ramus, similar 

 in shape, is less than two-thirds the length of the inner, with its inner margin feebly 

 serrate. 



The small oval telson, by its extreme transparency, is obscure in outline. 



Length, from apex of first antennae to extremity of uropods, 8 mm., of which the first 

 antennae measure about 1'75 mm. 



The species is named in well-deserved compliment to Dr. G. Herbert Fowler. 

 Occurrences : 26 b. 2000 to 1500 fathoms. 1 mutilated specimen, 8'75 mm, long. 

 27 a. 1250 to fathoms. 1 specimen. 



SciNA, Prestandrea, 1833. 



Down to the present century this genus by itself constituted the family, and the 

 synonymy can easily be discovered from the references already given in connection with 

 the family designation. 



With regard to the subjoined tabular view of existing species, some remarks are 

 requisite. As already noticed, the species Scina acanthodes has been transferred to a 

 new genus Acanthoscina, of which the mouth-organs are not yet known Avith any great 



