1316 THE VOYAGE OF H.M.S. CHALLENGER. 



Second Maxittw. — The plates long and narrow, the inner a little shorter and con- 

 siderably narrower than the outer. 



Gnathopods agreeing very nearly with those of Lanceola ssstiva; the wrist in the first 

 pair less dilated, with the front margin less convex. 



PersBQpods. — The First and Second a little under half an inch, the Third nearly three- 

 fifths of an inch, the Fourth three-quarters of an inch, the Fifth one-third of an inch 

 long ; the relative proportions may be represented by the numbers 54, 56, 69, 90, 40. 

 In the Third Perseopods the fifth joint is longer than in the preceding pair, and not 

 shorter than the fourth joint, differing in these respects from the proportions found in 

 Lanceola ssstiva. 



Uropods differing little from those of Lanceola ssstiva, except that the peduncles of 

 the second and third pairs are narrower, with the inner apices more acutely produced. 



Telson long and narrow, about two and a half times as long as the greatest breadth, 

 not cpite reaching the bases of the rami of the third uropods, the central dorsal line 

 angled for a short distance from the base, the apex almost acute, the sides being a little 

 serrate near the apex. 



Length, without the antennae, about nine-tenths of an inch. 



Locality. — Station 158, in the Southern Ocean, March 7, 1874; lat. 50° 1' S., 

 long. 123° 4' E.; 1800 fathoms ; bottom, Globigerina ooze ; bottom temperature, 33°'5 ; 

 surface temperature, 45°. One specimen. 



Remarks. — The specific name refers to the place of capture, which makes it improbable 

 that this species should be the same as the large Lanceola serrata, Bovallius, from " the 

 mouth of Davis Strait," in which, moreover, " the dorsal side of pereion is smooth." 

 In Lanceola suhmi, another North Atlantic species, the dorsal teeth are more numerous 

 and larger than in the present species, and in the third perseopods the fifth joint is not 

 longer than in the preceding pair and is shorter than the fourth joint. 



The following table will show at a glance the remarkable distribution of the genus 

 Lanceola, as illustrated by the eight specimens of the Challenger collection : — 



1. Station 50 ; lat. 42° 8' N., long. 63° 39' W.; depth, 1250 fathoms (Lanceola 

 suhmi). 



2. Station 106 ; lat. 1° 47' K, long. 24° 26' W.; depth, 1850 fathoms. 



3. Station 120 ; lat. 8° 37' S., long. 34° 28' W.; depth, 675 fathoms (Lanceola 

 ssstiva). 



4. Station 334 ; lat. 35° 45' S., long. 18° 31' W.; depth, 1915 fathoms. 



5. Station 297 ; lat. 37° 29' S., long. 83° 7' W.; depth, 1775 fathoms. 



6. Station 158 ; lat. 50° 1' S., long. 123° 4' E.; depth, 1800 fathoms (Lanceola 

 australis). 



