460 



MISS E. M. R. WOOD ON THE LOWER LUDLOW [May I9OO, 



Fig.12. — Monograptus 

 comis, sp.nov. (x.5). 



Proximal Extremity. — Sicula probably about 1-77 (*07 inch) 

 long, and its apertural -width ='38 mm. 

 (•015 inch). The first theca arises dis- 

 tinctly above the aperture of the sicula, 

 but grows down so as almost to reach the 

 aperture. 



Thecae. — Twenty-nine or twenty-eight 

 in 1 inch (eleven and a half to eleven in 

 1 cm.), inclined to the axis at an angle 

 of 25° to 30° ; straight tubes, uniform in 

 width throughout; the adult thecal are 

 1*77 mm. (-07 inch) long, and from 3 

 to 4 times as long as wide. Proximal 

 thecae in contact merely, or with a slight 

 overlap in the distal thecae. Lower free 

 wall concave or straight. Apertures con- 

 cave, the lower wall prolonged into a 

 pointed denticle bending outward and 

 slightly downward, but with no actual 

 spine. 



This graceful species is readily distin- 

 guished by (a) its general form and (6) by 

 the character of the thecae. The proximal 

 extremity shows that it belongs to the 

 In other respects M. comis has no marked 

 resemblance to any other species. 



Localities. — Ludtow district (Elton-Evenhay Lane). 



H o r i z on. — Zone of M. Nilssoni. 



[Enlargement of Ihe 

 proximal extremity of 

 fig. 8 a in PI. XXV.] 



group of M. dubius. 



Mofogeattus gotlandicus. Pernor. (PL XXV, fig. 7.) 



1890. Monoi/raphis sp., Holm, ' Got lands Graptoliter ' Bihang till K. Svensk. Vet.- 

 Akad. Hand], vol. xvi, pt. iv, no. 7, p. 17 & pl u i, figs 27-30. 



1899. Monograptus gotlandicus, Perner, ' Etudes sur les Graptolites de Boheme ' 

 pt. iii, sect, b, p. 12 & pi. xiv, fig. 22. 



Hitherto only small fragments of this species have been figured, 

 and these only of the distal end ; the proximal extremity has never 

 been either described or figured, nor has the general form of the 

 polypan been given. Any identification with this species must 

 be, therefore, a matter of doubt, and it is with some hesitation 

 that I identify the following form with the fragmentary specimens 

 figured by Holm and Perner. 



Polvpary. — 3*2 mm. (1*25 inch) long, and straight distally, 

 but with a slight incurve at the proximal end. Width at the 

 proximal end = *76 mm. ('035 inch), increasing gradually to a 

 maximum width of 2*03 mm. ('08 inch) at the rate of *01 mm. 

 (•004 inch) for each theca. Distal end incomplete. 



Proximal Extremity. — Exact length of sicula not seen, but 

 it is probably about 2*03 mm. (*08 inch) long and -35 (-014 inch) 

 wide at the aperture, which is strongly concave and has a long 

 curved ventral spine. The first theca seems to extend nearly to 



