1.38 Dr. .J. I']. (fV!\y on .lom/' I'liilippinr'-TNland Hponrjcj;. 



" '^J'liift is a RoHsella^ an you will see directly, not //, antarc- 

 tica^ Hirnply bccauHC the arms of the Hurlaee or body in It. <ui- 

 tarciicd jire spined ; in the Philip{jiiie one they are .snKxjth. 



'' J)r. Wyville ThoinHon sent me a woodeiit of this spong'e, 

 notieing' its reseiid)huiee to Schmidt's 'Ij'A.UIa polijura. I 

 wrote hack and said it was allied to Iios.hc.IIh <iid<irctic,a arifl not 

 a Tcfliya at all, loi- jdl its spicules, of which there are only two 

 kinds ap[)ar(iit in IIk; figure, are, or sliould be, /owr-armed. 



" No Tctlu/ii, has more than tlirce-armed spicules ; hut his 

 artist had |)Ut in three-armed at the end of the tailed ones. 

 Now 1 see how the urtisthas overlooked this im])ort;int charac- 

 ter, just as Schmidt states, at the end of his ])rcf;u',(', to his 

 Adriallc sponges, 'an artist by ])rofcssion fails here' 



^' 'J'here is no such spicule, /oiir-arv/ic^/ recurved, in any other 

 s|)onge. Was I wrong in stating this as the peculiarity of 

 liossclld V I lave we not now found out a I'hilippine one hy it ? 



" lias not Thomson's arlisl, because he did not know the 

 value of this fourth arm In ihe tailed s])ieules, omitted to put 

 in more than thnie, althongh he has ])ut in four in the body- 

 spiculesy And do we not here see the disadvantage under 

 which a professed artist labours, as Schmidt has stated V 



" 1 find the Philip])ine llossdla has been put into a bottle with 

 the two other species that you sent down in the box, or at least 

 with the goblet-s])onge and the Fjuplrrti'llu'^' ^ because it contains 

 spicules of the latter. When tin; heads oi'sj)ieules with re(;urved 

 spines get into other sponges they break off and remain th(;re, 

 because being barbed hke an arrow they easily go in, but never 

 come out again ; and you can always tell that they do not be- 

 long to the species, because they have their heads where their 

 tails ought to be. No sj)ieide has a head like this in the sj)onge : 

 it is always at the extremity of the long spieuh^, of eourse. 

 Heru'.e it was that I foimd so many of tlu; four-armed headed 

 spi(!tdes stuck into Tetltija untarcttca, aiul was thus able to 

 nndte out the antarctic deep-sea germs RoHsdla. 



" 'J'here are several of the sjiiculcs of the goblet-sha])ed 

 sponge [Ora.frir(mior'j>//(i\ in Ihe surface of the IMiIli))[)ine It'os- 

 .s«/Aa, es])e(;ially the minute spicules, somewhat like In struelurc 

 though not In form l(j those; of ICiiplcctclld.'''' 



IVIr. darter, in a sul^sequent note, states that the iiiiinttc. 

 S))I(Mdes In (■rater(i-}norplia. and JiONse//.<i ai'e very mu<"li alike, 

 :iiid lliat tliey botli contain <'i-ueial-headed ones Aviiieli are 

 almost undlstlngiilsliable rr<)ni each other. 



lie also adds lliat Dr. W. ^riiomson lias sent him ihe specl- 

 )nen of Iiosscl/n abov<' alluded to, and that It turns out lo be a 



* [It wiiH (•itnlnliic*! ill lln' :-fi)iic linltlc nfHpiriiH m ]inpl('clcll((, — .1. V). ().] 



