1332 THE VOYAGE OF H.M.S. CHALLENGER. 



of longitude ; from the locality of the large specimen A its place of capture was far 

 more remote, the distance being about 6 degrees of latitude and 170 of longitude, 

 yet between these two specimens, obtained at opposite sides of the globe, I could 

 perceive no salient marks of difference, other than the following measurements : — 



Length from the front of the head (as with the other specimens not including the 

 antennae) to the extremity of the uropods, two inches ; antennae just over six-tenths 

 of an inch ; first peraeopods a little over six-tenths of an inch, second peraeopods a 

 little over an inch, third peraeopods an inch and a half, fourth peraeopods (fifth joint 

 broken) about an inch and one-tenth, fifth peraeopods seven-tenths of an inch ; in the 

 large third peraeopods the first joint is half an inch long, the two following together 

 three-tenths of an inch, the fourth eleven-thirtieths, and the slender fifth ten-thirtieths 

 of an inch ; the minute fingers have not been taken into account in the measurements 

 either of this or the other specimens ; the first uropods are almost four-tenths of an inch 

 long to the extremity of the coalesced inner branch, the outer branch, which at least 

 in its present condition is a little shorter than the inner, is just under one-tenth of an 

 inch long ; the second uropods, which reach just beyond the first, are three-tenths of an 

 inch long, the outer branch as long as the inner, just over one-tenth of an inch long. 



Locality. — Station 224, March 21, 1875 ; between the Admiralty Islands and 

 Japan; lat. 7° 45' N., long. 144° 20' E. ; depth, 1850 fathoms; bottom, Globigerina 

 ooze ; bottom temperature, 35°"4 ; surface temperature, 81°'2. One specimen, male. 

 Dredged. 



Remark. — Whether the small branchial vesicles of the second gnathopods and first 

 peraeopods were present in this specimen, I could not determine without dissecting it. 



Cystisowa. Specimen F. 



Antennas one inch and one tenth in length, the basal joint not longer than broad, its 

 distal margins slightly convex, the terminal joint minute, acute, the second joint more 

 than an inch long, with the usual slight serration, some slender setae, which are most 

 numerous near the base, the joint tapering for some distance from its base, but for much 

 of its length narrow and of nearly uniform breadth ; just before the narrow apex is reached 

 it shows a slight tendency to thicken. 



Mouth Organs, so far as could be seen without separating them from one another, in 

 close agreement with those already described for the species Cystisoma spinosum. 



First Gnathopods four-twentieths of an inch long ; Second Gnathopods more than six- 

 twentieths ; First Perseopods fifteen-twentieths ; Second Perseopods one inch and two- 

 twentieths ; Third Perseopods one inch and twelve-twentieths ; Fourth Perseopods 

 one inch and seven-twentieths ; Fifth Perseopods a little over fourteen-twentieths of 



