4" 



by vory siinihii- hvpogiislrnl oxvlioxaotiuos, (o which :ilso sKmhIoi- coniitnlia. 

 ai'O athu'luHl. 



'IMu- iuUM'iiUHliaiT |>ai'oiu'h_vi\iaH;i aro I'l'in'i'stMiIiHl by vim'v ihiuum-ihis inin-o- 

 si'lovi> (ixvhoxastors ami their iK>rivati"s (in //. _//7>/(/i(/((n simplo sij^'iiis). lu-siilos 

 thoso also micro-oxyhoxaotiiu's willi stout, couii'al rays whii-h shmv a IimhIimu-v 

 to bifuroation (//. rohiiahiK) aiv soim^dmos iiu>t with, (iraphiohoxastors witli 

 lonj;" bnisli-Uko oiul-tut'ts of brnnch-vays ami i'alii'oroiiu>s with tasst»l-liko biiiu'lu<s 

 ol" braiK'li-rays, arraii^'cd in a liiii^ ami rorniiui;' a bush, ai*i> always uu>l with, 

 nltluiuy;h souiotiiuos thcii- uuinbrr is but small. 'I'lio lloriciMiis ai\il discD- 

 hoxasli-rs jirosiMit in llu- nearly allii'd ;;i>nns MdlitrosiU'rits, are i>n(ii'i'l\' absi'ul 

 in lli>lii.<i'iis, 



Tlio lonji^ anduu'-siiii'ules ol" I he ront-t nfl ari> mostly eoyeri>il with reeuryed 

 spinos. Helow, at tlieir distal ends, tlu>y ai'e thii'lvened and bear ii-.i, rartdy 

 12, (1 or 7 stout, oblii|uely-reenr\ed spin(\s, wliieh foian the amdior-lt'el h. 



'Tiie spiries ol' this g'taius hilluM'to known aveonliui;ly are simple tubes with 

 root-tuft, aud tt>rmiual sievi'-plati> but willuuit pari(>lal aperturi's and snpei'lieial 

 Jlorii'oms. All ol' them have btnai I'ouud in greali depths. 



Jfolasnts ruliiisliis V. K. Seh. 

 IMal.' I.\, llos. 1 10. 



1805 llvUiM-im rohm^lns V. K. Soli, in Ahl.. ruMi^M. ,\1>. In;i,'., p|.. 1-7, Till'. I, IIkh. I 10. 



Tlio IVagnuMitary s|ieeimeu on whieh I lia\(> based t his spocioa is a, siniph* 

 lube, 8 em. Ion;;- and I .' > nun. broad. The liod\- (tnlie-) wall is S(Uin>whaL 

 lai-eraled but ou the wdiolo fairly widl preseryed and has a. I hiekuuss of U-li'D nun. 

 This fi-afj^mont nppoars to ropr(>siMit the upper part of a. spou^'c*, about 10 cm. 

 long, tlio toruuuaJ siovo-plaitii of w hieh has been lost. 



Th(« outer surface has an irre!;'ulai- appeacanee because tin* thin dermal 

 m(>iiibraue is in most placi>s lost and most of I he subdermal cayil ies, and Ilit> 

 iniau'i'ent canals arisiuji; from tliem,ai-e therefore e\posed to yiew. The eiilrauces 

 into the lalitcr appear as pores, 'i'lu^ inner, vjaslral siu'l'ace has a. yery dil'fi^i'eut 

 appearaiiee. Here wo Hud a ri\ij;ular reetau'^-ular network with (piadraXio nmslies, 

 each of which is occupii>d by a, pil. These pits ai'c arranged in rcgidar loiig- 

 itudiua,l aiul tiranHVorH(» rows. 



The structure of the soft parts can be well maile out in stained s<'ctious, 

 vertical to the surface. In such, one sees that' the ciliated chambers are <Mtlicr 

 tliiinblc-shapod, or assume uioi'e complicated shapes in conse(picnce of the I'orni- 

 aliou of diverticula by the meiubra,uu roticuhu'is. Tlu^y un^ arranj^-ed rjidially 

 round t lie shoi't cxcurrcut canals which l(^a,d into tluMioiitral gastral ca,vily, into 

 which tlicyopcii directly with wide mouths, — the pits in the meshes of the gastral 



