Quart. Journ. ffeol. Soc. Yol. LTI, May 



Table IV. — Distinctive Characters op the Lower Ludlow Graptolites. 



— 



PoLTF-AEY. 



P-.U .„„„« ..... 



a 



J 



a 



l-S 



M 



1 S 

 J™ 



General shape. 



Distal 



ln..l'.ii_Mti..n 



1 



g 



I 





Apparent 



apefot-la. 



1- 



■B.J 



II 



k 





intiitiL, 



li 



„sk 



Monogr aptus dubius (Sucss) 



5-10 

 6 



2-5-3-8 



2-54 



■76 

 •76 



Straight distally, in- 



curved i>m\i]ual]y. 

 Double curvature. 



Straight distally, in- 

 curved prnvhnnllv. 

 Straight distally, strong 



As in iir aVoius. 



None. 

 Slight. 



None. 



1-77-2 

 2 



■31 

 •6 



30 

 30 



Above aperture. 2ml thecal apevtun 

 Slightly above 2nd thecal aperture 



28-24 

 26-22 

 30-26 



2- 21 



35-H> 



2-76 

 2-40 



2-54 



2. 3 



H 



i 



H 

 H 



\ 



Pointed denticle. 

 Simple, or with denticle 



Simple. 



Simple, or with blunt 



>■■,,„„„.. 













•76 



Curved throughout. 

 As in M. dubius. 



None. 







28-30 

 23-20 







if. gotlnudicut, Perner 



32 



203 



203 



•36 



25 



At aperture. 



P 



25-35 



3- 



4i 



H+ 



i 



Long blunt denticle. 



It. comil, sp. nov 



2-6 



1-27 



■61 





Slight. 



1-77 



•38 



26 



Near aperture. 



? 



29-28 



25-30 



1-77 



3-1 



Very slight. 



i 



Pointed denticle. 



M. uUimiu, Pemcr 



1-27-3-0 



16 



■63 





None. 



1-0 



•38 



80-36 



Distinctly above 



Second theca. 



30-28 



30-40 



1-6 



3-4 



in- slight .ivui-laj). 



i+ 



i 



Simple. 





3-8-5-8 

 2-6-5-0 



2-3 



■84 



1 





Slight. 

 6'3 mm. long. 



1-9 



•36 



46 



Slightly ah-. v.. 





32 20 



40 

 30-35 



2-6 



6-6 



2 



Recurved projiiinnlly, 

 simple distally. 



v„, M ™,s<Mnreh.| 



var. compac/us nov 



1-9-2-5 



2 



•76 



Curved throughout. 



Stmit and well 

 marked. 



1-27 



•25 



40 







42-37 



40-60 



24 



4} 



i~i 



2 



As in M. colomu. 



M. Bsemcri (Barr.) 



3-7 



3-6-4-2 



'89 



Double curvature. 



1-8 



•32 



4046 







34-28 



40-46 



3-8 



6-61 



i 



2 

























Above second thee. 













2 







2-5 



21 



•76 





Long. 



2 



■36 



40 





36-28 



40 



2 



31 



i+ 





,ar./3uov 



3-8 



1-7 



■76 





Slight. 



2 



■36 



40 





Het.m'i. second & 

 t thin! thou... 



third thceiL'. 

 Above second tliccn. 



33 3h 



35-40 



2 



3M 



i 



2 





3f. chiituera (Hair.) 



1-27 



re 



•76 

 ■89 



Nearly straight 

 As in M. du&iut. 



Very slight. 

 Slight. 



1-9 



■32 



36-10 

 36-W 



Above aperture. 



42-36 



35-40 



l.i ,-,ii 



10 



31 

 2-4 



H 



i 



2 



Stout spines. 



var. Balmiyi (Hopk.) 



1-27 



1-6 



•72 



Straight throughout. 



Very long. 



1-9 



■32 



35-40 



Above aperture. 



31-30 



35-10 



2 



4 



H 



1 



Long slender spines. 



JX hiiittcaxtintiuie, Hopk. 



2-5-3-8 

 1-27 



1-6 

 1-9-2-1 



•72 

 ■85-1 



As in M. dnbius. 



Slight. 



1-9 



12 



36-40 



is in M. China 



■4 mm. above 

 aperture. 



Slightly above 

 NeTarlerture. 



Between 2nd & 3rd 



Ahove second theca. 



3i! 2s 



3S 33 



1" 13 

 40-60 



2 3 

 2'54 



34 

 3J 



i-i 



' 



Stout spines prosimullv, 

 simple distally. 



Spinoso'clnw. 

 Small spiunso clnw. 



■ var. micropmna (fckcl) ... 



2-5-5-0 



1-9 



■76 

 •6 



Double curvature. 

 Nearly straight. 



slight 



1-27 



■32 



30 



Second theca. 



26-22 



li l 33 



127 



2- 



slight overlap. 



1 





10-16 







Strongly curved. 

 Flexuous. 





























3f. oriaUiu, sp. nov 



M.Nilmmi (Barr.) 



76+ 



'38 

 1 



■21 



None. 



127 







o'mm!"ab,iv,. 



Near first theca. 



0>n>iil..'lahl,Y lirlnw 



first theca. 



" 



2(1 22 



6-10 

 10-26 



2 



8-6 

 5-4 





1 



Simple concave aperture 



3f. lotoau'eu (Barr.) .. .. 



10-16? 



2 



•36 



the proximal end. 



Slight. 



■85-1 



•32 



46 



npertui-e. 



27-23 



30-35 



1-8 



2-3 



li contact in- with 

 slight uvi'i-lup. 



1 



Widely concave, with 



slight denticle. 



