MAJOK OTVEN OS" THE SUHPACE-rATJlirA OE MID-OCEAN. 147 



more numerous, and that by far the greatest number Lave been 

 young and immature specimens. I liave counted as many as 

 thirty in one Medusa, and only a few of these were adults. In 

 other instances, however, and that too of the most common oc- 

 currence, the numbers would vary from one up to about a dozen. 

 But it must not be taken for granted from this that every Medusa 

 has its Syperia. This is by no means the case. I have seen 

 multitudes without any. 



As for Lestrigonus Kinaliani, the forms so named are ever the 

 fewest thus met with cooped up, and all have seemingly arrived at a 

 state of maturity. I have never yet seen a young or small exam- 

 ple of this species in a Medusa, but have taken them free. There 

 appears to be little or no difference between the young and the 

 old. They are both slender, and of a dark lead-colour, and both 

 have the remarkable long and hair-like antennas. 



But besides these I have likewise taken Anonyx Edwardsii, 

 Dexdmine spiiiosa, Aiylus Swammerdamii, A. bispinosus, Eurydice 

 pulcJira, and once a small specimen of Portunus marmoreus from 

 Medusce ; yet who would ever think of calling these creatures 

 parasitical ? Carcinologists do not, neither will we — although 

 some of them may have occasionally been seen taking a quiet 

 ride on the back of some of the smaller Medusce. 



It will be seen from the foregoing that only two species, viz. 

 L. Kinaliani and H. galba (m. & f.), have been in a measure parti- 

 cularly alluded to. The others will form the subject of and bo 

 more fully treated in another Note. 



On the Surface-fauna of mid- Ocean. By Major Samuel E. I. 

 OwEK, P.L.S., r.A.S.L., r.M.S.L., Associate of King's Col- 

 lege, London. 



[Eead June 7, 1866.] 



[Plate V.] 



No. 2. — Fokaminieeea. 



In a paper read before the Society and published in vol. viii. of the 

 ' Journal,' (page 202) I mentioned that I had found some genera 

 of the Poraminifera living on the surface of the ccean. I wish in 

 my present communication to give the names of the species and 

 the localities in whieli 1 have met with these B,hizopods, toge- 

 ther with such other observations on them as may appear worth 



12* 



