44 



inner margins. Four specimens of this species have been found 

 at Carlside Edge, on Skiddaw, two by Mr. P. Harrison of Keswick, 

 and two by myself None of the specimens are in a good state of 

 preservation, but I am the fortunate possessor of the best. Mr. 

 Hall, in his work on " The Graptolites of the Quebec Group," has 

 figured and described a species named GraptoUthus fncticosus, to 

 which the specimens found at Carlside Edge bear some resem- 

 blance ; but in the latter, there is no trace of the large pointed 

 radicle which forms the base of the organism in G. fruticosus. 



Species No. 2 is, I believe, quite new to Science. It consists of 

 a funicle giving off three short branches at each end. The funicle 

 measures about one-tenth of an inch, and the longest branch, or 

 stipe, does not exceed one-fifth of an inch in length. The cellules 

 are rather indistinct (Fig. 14). There are seven perfect, and four 

 or five imperfect specimens of this diminutive species on one small 

 slab of Skiddaw Slate, which I found at Randel Crag, on the 

 north-western side of Skiddaw summit. All the perfect specimens 

 are of precisely the same form, with a slight variation in size ; and 

 if further research should prove that they are young individuals in 

 an incomplete state of development, they may still be regarded as 

 representatives of a new species, as I believe none have been 

 found hitherto that are branched in this peculiar way.* 



I must leave the remaining monoprionidian genera unnoticed, 

 and pass on to describe a few members of the 



DiPRioNiDiAN Group. 



This group comprises forms that have two rows of cellules. 

 Their structure will be readily understood by supposing that two 

 monoprionidian stipes are united back to back, the axis running 

 along the centre of the wall that separates the two common 

 bodies. 



Diplograptus pristiniforinis is a typical specimen of the genus. 

 It consists of a flattened stipe having a row of cellules on each 

 side, also a well-defined axis running through the whole length. 



* 1 have since ascertained that Mr. Christopherson of Keswick has in his 

 collection an adult member of this species. 



