470 



MISS G. L. ELLES OX THE GKAPTOLITE [^Ug- 1898, 



The species is characterized by its shrub-like form, and by the 

 fact that the primary stipes have a tendency to run parallel to each 

 other, after the first divergence, in a manner which forcibly suggests 

 the habit of the later ' tuning-fork ' graptolites. 



Fig. 1. — Bryograptus Kjeruljt. 



Sicola 



Kat. size. 

 [Coll. Postlethwaite,] 



XlO. 

 [Coll. Brend.] 



Occurrence. — "With Bryograptus ramosus var. cumhrensis in 

 Lower Skiddaw Slates. 



Locality. — Barf, near Keswick. 



(c) Betogeaptus cf. CAELAyEi, Lapw. 



1880. t Br. Callavei, Lapw. Ann. Mag. Nat. Hist. ser. 5. vol. v. p. 165 & pi. v, 

 %. 21. 



This form seems to be closely related to Br. Callavei, Lapw., 

 though it presents some minor differences. 



' The rhabdosoma consists of two very slender flexuous primary 

 stipes, which diverge from the sicula at a rather wide angle. From 

 the inner margins of the primary stipes secondary branches are 

 given off. These are un symmetric ally disposed. The thecae number 

 twenty-five to the inch (eleven in 10 mm.) ; they are in contact with 

 each other ^-^ their length, and are long narrow tubes of uniform 

 width throughout their length. They are about 5 times as long as 

 wide, and are inclined at an angle of 20^. Their outer walls are 

 straight. The apertures are straight, but oblique to general direction 

 of stipe ; the apertural angle is about lOo*^.' 



Unfortunately, only one specimen of this Fig. 2. — Bryograptus 

 form has been found, and in this there are Callavei {coU. Wood- 

 only two secondary branches,, and even these 

 are incomplete. It seems to be a very 

 slender form, the maximum width being 

 only -X^ inch (-63 mm.). The sicula is less 

 conspicuous than in the other Bryograpti 

 known from the Skiddaw Slates ; it does 

 not exceed -^ inch in length (I'Oo mm.). 



tuardian Museum), 



[Sat. size.] 



