456 
THE VOYAGE OF H.M.S. CHALLENGER. 
-i., : uot the case ; .all the e parts are of the ordinary size, the breeding lamellae are, of course, 
wanting, and the pleopods are stronger than in the female. There would be no male 
character were it not for the presence of a pair of small styliform penes behind the last 
pair of pereiopods, as in the higher Decapods. I have not been able to make out what 
p t 's of the body arc used in this transformation, as the pleopoda, the first pair of which 
assumes this function in the Macrura, seem to be normal in size and number. This 
species will be described as Petalophthalvius inermis [ = Boreomysis scyphops]. The 
- n ■ modification of male characters was found in another Schizopod taken to-day, in 
which the pleopoda were fully developed ; the gills, however, were absent, and the number 
>t ambulatory perciopoda was the same as in the .Mysidae, so that it maybe regarded as a 
very aberrant Mysid near Petalophthabnus, connecting that genus with the rest of the 
Schizopods. I think i shall call it Crozetia mysidiformis [ = Amblyops crozeti%\. The 
_ size of the Fusoid reminds one of the dimensions attained by certain groups of 
animals in extreme climates. Some of the Macruri seem to me to be the same as those 
taken in deep water between Gibraltar and Madeira.” 
1 1 7 a. Station 147a (Sounding 240), off Crozet Islands (see Chart 20). 
January 1, 1874 ; lat. 4G J 45' S., long. 50° 42' E. 
Temperature of air at noon, 41 , 8 ; mean for the day, 41° '9. 
Temperature of water at surface, 41° ’0. 
Density at 60° F. at surface, l ’02503. 
Depth, 600 fathoms ; deposit, Diatom Ooze, containing 3fi , 34 per cent, of carbonate 
of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 2 a.m. sounded in 100 fathoms, no bottom. At 4.30 a.m. sounded in 90 fathoms, 
no bottom. At 10.45 a.m. sounded in 300 fathoms, no bottom. The land was obscured 
by a thick fog. At 2 p.m. sounded in 600 fathoms. At 4 p.m. lost sight of Penguin 
I. l.md in a fog. During the day white and black albatrosses, carrion gulls, king 
.1 nurn rous other penguins, prions, and stormy petrels round the ship. 
Distance at noon from Penguin Island, 19 miles (?). Made good 53 miles. Amount 
of current 16 miles, direction 8. 20° E. 
o w Surface Organisms. — The water was quite red-coloured, due to innumerable red 
( which were captured in so thick a mass that it was impossible to see the other 
.■.ill re. bs; Sagitta, Hyperia, and other organisms were, however, present. The red colour 
- f the v. < r, mentioned in the Indian Ocean Directory as occurring among the islands in 
the-'- latitudes, is probably due to these small Copepods. 
