REPORT ON THE SCHIZOPODA. 145 



Description. — Ouu specimeu only of this form, a female, is found in the collection, 

 mounted in Canada balsam on a glass slide. The specimen measures in length 9 mm. 



The form of the body (see PI. XXVII. fig. 5) is somewhat short, though perhaps a 

 trifle more slender tliau in Sti/locheiron suhmii, the posterior division being rather more 

 elongate in jiroportion to the anterior. 



The carapace appears relatively smaller than in the last species, exhibiting for the 

 rest a very similar form. The anterior part is slightly keeled above, and juts out as a 

 rather short but acute rostral projection. 



The caudal segments are, as in the other species, quite smooth above, and provided 

 with well-defined, though not very large, rounded epimcra. The last segment is scarcely 

 longer than the preceding, and would seem to lack the preanal spine. 



The eyes are considerably larger than in StijJochciron suhmii, and greatly compressed, 

 expanding at the end, with the cornea remarkably narrow, oblong, and but slightly 

 contracted in its upper part. 



The antennular peduncle is exceedingly slender and elongate, more so even than in 

 the last species, and appreciably exceeds the carapace in length. The tiagella are some- 

 what longer than the peduncle, and very slender, filiform, l)otli of them five-jointed 

 and equal in length. 



The antennal scale reaches a little beyond the second joint of the antennular peduncle, 

 and exhibits a certain resemblance to that in Stylocheiron suhmii, though possibly a trifle 

 broader. The flagellum is prodigiously elongate, perhaps several times as long as the 

 l)ody, the peduncle alone having more than twice the length of the carapace, with the 

 outer joint exceedingly narrow and linear. 



The second pair of legs exhibit a structure very similar to that in Stylocheiron suhmii, 

 but are relatively still more produced, exceeding, when fully stretched, the w'hole body in 

 length. 



The caudal fan would seem to differ from that of the last species in a more elongate 

 form of the uropoda, projecting appreciably, as they do, beyond the tip of the telson. 

 Both of the terminal plates are about equal in length. 



Habitcit. — The above described specimen was obtained at the surface of the sea, in the 

 following locality : — 



The species also occurs in the Mediterranean, since a few specimens were taken by 

 myself, at Messina, in the year 1876. 



(ZOOL. CHALL. EXP. PART XXXVIT. — 1SS5.) Oo 19 



