134 



iu;rouT — 1884. 



iniiny of tlio Crotaocousaiul Junissic! snccics in (lio'i- miiccllnlur clininctt.'i', 

 and Sloiiitifoi'ont iintjir, oxcopt in tlio want of fi'iicstiat ion, soi'in In In- 

 allied to foi-tiis (K'^crihccl \)y I'mf. Xicliolsoii IVom (ho ('iiiciniiati rocks of 

 America, but my own unism-ial I'orius clill'cr IVotii tlm .luiiis 'ic' 



Family fl. 'I'l ;;ri.iroiMi>.i:. 



/iKiriimi. I'litiic'ly adlu'rcnt, or more or less Ircc uiid ( rci.'t, mull i!'ui i;i, 

 oftcMi liuoar, or ilabclliitD or johuti', f-omctimcs cyliiiilrifal. '/.•■irr',,i 

 tul)ular, dispos'i'd in cuntij^uoiis si'iics, or in sinuli* lines. Oirriinu an 

 inllation of the sni-fiii'o of t,lu> zoai'inm at curtain points or a nujdilicd i-cll. 



Jn JJnsk's ' Crai,' I'olyzoa,' [). !'l, tlio Tnlailiporida' incliulo the tlircr 

 genera — Mrsrii'fn'/ii>rii, HIainv, Ti'hiilijuirii, liiuuk., and .Hrr.'n (Stoinatn- 

 pora) Lamx, In tiie ' 111. JJrir. iMus. Cata!()!:,nio ol' Poly/oa,' p. 2o, -I/"'", 

 iStdDiatnpiira and Tnhiiliiiord only aro incliulcd. Tho Mfsi u'l rijxirn is 

 relegated to the Diastoporida'. In iMr, llineks" 'Brit. ]\larinc( Polyzon,' 

 tlie Tubuliporidu' iu'dndi' tlic genera — 



SroMATOrouA, Bronn. Kntai.^'Iiioi.'A. Lamx. 



Tl'UL'MI'uua, Lamk. Diasioi'oua, (part) J^amx. 



Ii>moni:a, Lamx. 



Genus Sto.matoi'OI.'A, Bronn. 



1821, Aleclo,- Lamx. ; 1825, SloDuifojiorn, Bronn.; l&2('>, Aidcjiont, 



Cioldfnss (part). 



Zoarii'vi rejwnt, wholly adnate, or free at the extremities, or giving o!V 

 erect processes, simple or braneluul ; brandies more or less lign!at(\ 

 Zoor'tit in givat part immersed, arranged in a single series or in se\i'!-.;l, 

 which take a linear direction or arc very slightly divergent. — Busk, 

 'Brit. ]\Ius. Cat. 111.' p. 2:'. ; llineks, ' Brit. .Mar. Polyzea,' ]>. -VIA: 



Of my own knowledge I have but little to furnish icspecting Tertiary 

 Sfonmtopnra below the 'Crag.' IMy c(mtincntal material, both Iloeene 

 and !Miocene, has only yielded to me a few veiy minute riagments of two 

 species. In his work on the ' Biyozoa of Castrocaro ' (Pliocene), .Manzoni 

 describes three species of Shr,niil(ipnnt (Alecto) as found by him. One 

 species of very frt'ipient occnrrenee is named by him JAv'o CW.-.//v/rf(;v,-,s,'.-, 

 Maiizoni. It is a very line example of this type. The large and peculi.-ir 

 character of the cells is noted by the author (' Ijrioz. Castro.' p. dO, pi. vi. 

 iigs, 71, 71'). Tlie.vo^c/"' are grannlose and ]iunct!ite, but exccj)t that he 

 speaks of the grand dimensions of the cells we are left in entire ignoi'anee 

 of their natural size. Besides this beautiful form ^lanzoid deseiibes and 

 figures two other (S7(j;;nx/o;)()r't' — N. (Alcctu) rein in^;^ Wood, and S. (Alcrlij) 

 jyarasita,^ Heller. 



In the 'Crag Polyzoa' (p. 112, ]d. xx. fitjs. ."), 8, and ibid. figs. (1, 7) 

 Mr. Bask describes and figures .1. rcjuum, S. AN'ood. and .1. dilulidis, W. 

 Thomson. I cannot regard — so far as I may be allowed to t'xpress an 

 opinion by comparing the figures in the absence of sjiecimens of ^lanzoni's 

 type — the A. rcjwn.'i of ]?v;sk, and the A.rrpoii? of Man/oni as one and the 

 same species. The Crag specimens in my cabinet show A-ery well the 

 characters of Busk's species, but none of the cell characters of JManzoni's. 



' 8oe 'Silurian Uniscrial Stoinatoponi; and ^Vl.'nl()^k I'nlyzDa' (uiilii'', Qiiurt. 

 Jour. Ccol. Xir,- AiiL'. 1881, Feh. 1SS2. 



- Nanio pnn'ionsly used for a yroup of iM'hinodeniis l)v Loach (181t). 



'l!!i 



-i:;i!i 



Ibid. tav. vi. li 



Tav. vii. li--. C.lt 



