Till' bast' »las|t('(l liiinlx a small Imiicli ol' 1 1 \ aloiiniia lilncs, the iiiar- 

 jiiiis o( Wwh-.xsvvonuwiX iiilo {h>sv ('(nilacl, I»m( s( ill hciiii; separable by tlio 

 ustM)!' a little Ibicc. 'IMu^ animal (IM. \\\ii, l-'i-;. 10.;) is much chMi^aletl 

 ill I lie (liiection ol' the axis of the bmieh of libres to wliieli it is alincheU, 

 and is low. Tlieeolnnm uall is remarkable on aeeomit (»!' its brittleness. 

 it is hard and brittle, like paichmeiit, and is miieli wrinkled by <'on- 

 trai'tion. In sections throiiuli a small pieee of (lie wall no eeloderm or 

 entiele eonid be observed, bill the mestt^Nea was loiind to liaNc ln'cii 

 altered into a ehitin like siibslanee, not taking the slain (borax- 

 earniino) except on (he outer and inner snilaces (o a slii;ht extent. .\ 

 distinet thickened riny snrronnds (he upper par( of the «'ohiiiin sepa- 

 ratinii" the scai)ns from tlu> capitnlnm. The latter has a sliiihtly 

 irrejiular surface, bnt is not tiibercniate, ami dilfers Irom the scapirs m 

 lackinji' the chitin-lik(> induration of the inesouhea. 1 c(udjl discover 

 uo trace of ciuclides. A stroiii;- si)hincter imbedded in (he mesojihea is 

 present, but 1 can ^ive no aceouut of its shape in transverse sections. 



The teutaeles are completely emicealed, and my pre[)aratious do not 

 throw any liy;lil upon the number or arranj;emeiit of the mesenteries. 



l-amily lU' NODID.K. 



Aetiuiua^ with numerous perfect mesenteries, and with a strouj;', «'ir- 

 eumscribed eudoderiiial sphincter. Column wall freipieidly ])rovi(led 

 Avith tubercles, veriuca', etc.; mar.iiin freipiently with *'(»iiiplicate<l 

 acrorhagi. No acoutia. 



(iciiiKs LEIOTEALIA, llti i wii^. 



llertwiii' (\S;>) established this ^cnus for a form which dilfered from 

 all forms which had previously been assigned to the family Huuodi(l;e 

 by laekiu^u' the tubercles or verrucas which had been considered char- 

 acteristic of the family. The internal arraiiiicnuMits of the ClKtlliiiffcr 

 speciuieu showed i(, however, to be closley I'clatt'd to the- verrucose 

 forms, with which llertwij;- very properly associated it, substituting;- 

 for previous tletinitions of tln> family, w liicli he named Tealiche. a more 

 accurate one founded njion an anatnniical basis. 



To the .menus Lciotralia are to be referred Ibiiiodida' without verruca> 

 or acrorlia,i;i, and perhaps to this may be added tiie pinnate arrange- 

 ment of till' muscle processes coustitulin.u (he sphincter. 



31. Leiotealia badia, sp. iiov. 



P(;itf \X\ii, ("ig. lot : I'liitt' wxiii, IM,-;. ((Ki. 



No. TOL'. Still ion L'TTi). l.al. .">;{' 0(> S. ; loii>;. 70 10 T.O ' W . 1 >f|.tli, 77n";>t'i«'ius. 

 One siu'ciiiuMi. 



The base is lirnily adliiM'cnt to a lai oe annelid tube. The coliium i8 

 coiilrac(cd (o a soiiiewiiat conical shape, and ineasiires 2'"' in height 

 with a diameti'r midwa\ between (lu' base and maiiiin of 2.o''"". It is 



