412 I'liiu'Ki'JUNaFf OF riih: x.rriox.n. misium. v..i,. xm. 



OhNrrralioiis. — 'IMiis liiM' spccicH <)c<'iirs in iii slijily Miim'sIoim' in Mm^ |>;ih- 

 Si\{Xi' l)('(l.s bcl wcicn (IkM 'iinilniiiii :in<l ( )r«l(>\iciiMi. In form \hr \;ilv('S 

 ^(>s('nll»l(^ H(^nM^\vlli^ll Miosd oCO. ( L.) ttinphis. In I he ;ihH('nc(^ ol" ;ill into 

 rior liiiii'Uini^fH, no riiiMicr coinparisons ciui hr nnulo. 



FttiuKition mid UkuiIUji. — lliiso of I'oj^onip liniCiHlonc, v.vsl slopo ol' 

 Mk' ii(lji(M^iiHt of lliiniluir^' IM(ljn<', I'luickii (listiici, Ncviula. 



Tiipv.—H o. liT.'lil!, 1 1 .S. N . M . 



OBOMJS ( MNC.UI.l-'.l.KA) PRINDLKI, lu-w species. 



Tliis spocics \\;is iii first ronsidcrc*! t(» \h^ idcniicwl with (>. ( /y. ) <if<iii 

 riUnisis. Tlir study ol" a im'W lot of \v<dl pr<'S(irN(Ml spcc.iMicnH shows tii:it> 

 it dificis \'\{)u\ ;/riiiirilliiisis in h«'inf>' Uvss (^lonjiJit.c, nlo^(^ ovatci in out. 

 Iin<', and iiiaiUcd upon tlu' inlciioi- by a. Vi^ry finely jjranulatod sui'liUM^; 

 in the cast the papilla' and the line depressions between them appear 

 |<> be ai ranged in transNcrse iin<lnlatJny lines. 'V\\^\ t I'aiisvei-se lines ot 

 ^i'rowlh on the area of llu' vcnhal \alve, as seen in the cast, ai'c pecnl 

 iar in ha\'in};' an indnicatin;^' or lainellos(^ like aiian/^eiiienf. The areas 

 of both valves ai'e lathei' Ijii<i(' for so small a* spt'cies. 'Die avcMaj^'c 

 l«injil h of tli(^ vonli'iil valve is .'{.o mm. to I mm., and th<^ width .">.'_'."> mm. 

 The dorsal valv<'> is a little sliorter than the N'cidral. 



(>. ( //.) jirhiiUi'i belonji's to a^ j^ronp of small shells that is repr^^sellt«'^i 

 by (>. ( I..) I'crnui'un'UH^ <>. [Ij.) rohin<l(itiis, (>. ( //.) <l<:si<lrr(ifii.s, and <>. (/;.) 

 finiiirillnisis. TlM^s^^ forms are anionj; IIk^ (earliest, sjkmmc^s of Mus };enus, 

 and raiific throiifi'h to tlio Ordovician fauna. (>. (Ij.) (/luinrillniMs and 

 liriHilIri occur in the upper limit' of the Olciudlns fauiui of (^astern New 

 N'ork and wi^stei'u N'crmont, and (>. (/>.) vohnuhtliis and niaiiliriihis are 

 Ibnnd aX fh(^ base of the Ordovieian fauna. 



'IMie spiM'ilic name is yiN'en in i-eco^^uition of the elfective woik of Mr. 

 L. M. Priinlle, \(ho, hh assistant to I'rof. T. N«'lson l>alc, collected the 

 llrst spcM'iuM'ns of flic spt^iiivs. 



Fonnolioii <iii<l loraliti/. — llp|>er limit, of Lower ( 'ainl>rian or passa|;«^ 

 beds between I;owerand Middle Candu'ian. Thin bedded limestomnn 

 shah', 1 mile soul h\\ t'st. of VVyuanlskill and o unles (^istof Albany, in 

 iJcnsselaiM' ( 'ounty, New Voik. 



/•,/y„..s'.— Nos. l'7;5;5;m, ii.h.n.m. 



OnOLUS (MNGULELLA) PUNCTATUS. new species. 



(^lOueial form ovate, with the \'entral valvo subaeuminatc. N'alvos 

 mod(>rat«'ly con\«'X, with tlu^ dorsal valvci having;' a slij^htly d«'press(Ml 

 median sinus t hat <>\t(Mids from near the umbo to the anterioi' mar^^in. 

 Surface of shell nnirked by lines and stria- <d" i^i'owth, and very line, 

 slijiliMy undulatluf;' stria-; also a. lew faintly indicated radiating- stria-; 

 Avhen the outer layei- is exfoliated the outer surfa.e«^ of the ium-r layer 

 is s(-(-n to be mark»-d b\ nnnu'i-oiis and very tine ratliatine' stria', in 



