142 ACIlM.i: <>!' ALr.AI'Ix'OSS i:\ri,<>K ATIONS M'MIMCK'M 11. 



I lliiiik tliiii llic |nir|»(»s('s (»r classiliciil ton will he ltd Icr scix «'(1 l)y 

 iiiiiliiii; llicsc iiiid similnr lonns iiilo a siiiiLilc liiinily, lorwliicli (licnanio 

 I liilnimpida', airrad.N iis<m1 in (Iiis sense by lladdnn ('SIM, may bo 

 employed, and (o reeo^id/.e in (Ins laniily several genera. The <;eiius 

 llrJniHijxt seems to be well eliai'aeleri/,ed by lis hexanieiisni and llie 

 (list inel ion inio eapil nliim, sea|)ns, and pliysa. //. prothwht, of (lie east, 

 coast of Noilli Anieriea, and II . ctiiu iisis N'eir., //. Iiririrnrnis (Slinip 

 son), ami //. i>>liiiii)s<>nii N'eirill ('<»."»), deeainerons Ibrnis, may be 

 felerred (o anol bei' ucnns, Ihoiiuli probably i( will be well l(» sepa^al(^ 

 //. i> rod mid from ( he o( lier I liree and refer it lo a separale ^enns. The 

 i'orm described by Jonnlan ("SO) as I h/inilli lis .]lii:rli sci'ms to bo 

 closely i'elal('<i, and //. piotliKhi may l»e relened with it to tli(> ticnus 

 /•,7(»(((7/.s' ])roposed l>y A mires ('S,;). 



In addition to these tliice n'cneia, since Andrt's' y-eims Hdlcinnptlhi 

 and I >ainelssen\s llnli'diii/ioidis ('!M)) do not seem nec(>ssary, t here will 

 be of the conchnla l>carini;' forms I'ldiiiid, which is dccamerons, and 

 liici<lii(ni, which is h(>xanierons. The i^enns .l(7///«>/'.s/.s', which is asso 

 cialed with these lw(» ii'eM»>ra by Andics, |)i'esents c<Mlain e\t<MMial 

 characters which make one hesitate somew liat to retain it in the iironj). 

 I'ldil an anatomical stndy of it has b(>cn made it will jtroltabiy be as 

 well to lea\'e it wlieri^ it is. 



Anioni; (he . I //'(f/r<»,v\ material i lind (wo species which may l>e I'c- 

 lerred to th(> family Ihns emended. ( Mie of these is a. I'rdiiiid: the 

 oth»>rmnst, I (liinK. be rcterici! to a new ;.;('nus related (o Ihilvdiupa 

 or IHodfds. 



(i(-iiiis HALCURIAS, ixru. iiov. 



Ilaleanijiida' wi(h an adheriMd base; column cylindrical ; (en(a('los 

 nnmerons ami shor( ; (en |)airs of ineseii(eries, all of which are peit'eet., 

 lluMiuh fonr pairs si(Ma(ed in (he snico laleral and lateral iidermesen- 

 (erial s|>aces are less extcnsixcly dcNcloped than I he ot her six. No con 

 ehula. 



3. HalciuiciB pilatus. s|i. nov . 

 riatr \\, iMiiS. 1L> 1:5. lM;il.' \\l. 1 ijis. I 1 If.. 



Nds. 7()S.7t>!t. Sl.Mlioii, I'TS."). l,:it..ls (l!l S. ; Iuhl;.. 71 itii \V. 1 >f|)( ti. HMt'iitlioius. 

 Tliiti' s|ii>('imfiis. 



'I'he l>as(> is lla( and adherent, one ol the specimens bcin^' sealed 

 upon a pieci' of dead coral. The c(»lnmn ^ I'l. \ \, l-'ii;. I'J) is cylindrical, 

 mnch w iiid<led iVom cind ract ion. but appaicntly possivssin^' no warts 

 or tid)«M(les. Il measni'(>s 1}..'>"" ii\ hei^^^ht, while its diameter at the 

 base is '_'"". Slii^hl indical i(»ns of loniiiludinal bands of color can be 

 percei\MMl, bn( ( hey ar«M'\ce«'din,inl,\ obsciire and eonld not l)e discovered 

 on all t he specimens. 



The marjiin is smooth and forms a \ cry distinct paiapet around (he 

 bases of the tentach>s. These ai'c nnmerons, amounting' to about, 

 sex'enty in one specimen in which tliev w I're counted, and are arranged 



