RETIOLITES. 343 



Meigle Hill, Gala ; Mount Benger Burn. C. Wales ; Gelli-dywyll, near 

 Llanbryn-mair. 



Collections. — Lap worth and the Authors. 



Var. cfr. macilentus (Tornquist). Plate XXXIV, figs. 13 a and l>. 



1887. cfr. Betiolites macilentus, Tornquist, G-eol. Foren. Forhandl., vol. ix, p. 491, fig. 3. 



There occurs in the Browgill Beds of the Lake District a Betiolites closely allied 

 to Plegmatog. obesus, which may be compared with B. macilentus of Tornquist, 

 Fig. 224>.—piegmatograptus obesus, var. and is here regarded as a variety of P. obesus. 

 ts ( ornq) - It differs from the typical form chiefly in the 



character of the network, which shows very wide 

 and regularly arranged hexagonal meshes through- 

 out. 



Horizon and Localitg. — Gala-Tarannon, Browgill 

 Beds. 



Lake District : Swindale Beck, Knock. 



o 



Distal fragment showing wide meshes. 



Enlargement of part of pi. xxxiv, Associates, etc. — Var. cir. macilentus is a rare fossil 



8 ' a ' in Beds of Gala-Tarannon age, but has been found 



associated with Monog. Marri, M. continens, and Bet. (Gladiog.) Geinitzianus, etc. 

 Collections. — Marr, Sedgwick Museum (Coll. Nicholson and Fearnsides). 



Sub -gen us Gothograptus, Freeh. 



1897. Gothograpius, Freeh, Lethea Geognostica Palseozoiea, p. 670. 



The title employed for this sub-genus was proposed by Freeh to include 

 Holm's species of Betiolites, B. nassa. The chief characteristic is afforded by the 

 form of the thecse. In addition to B. nassa the group includes Bet. (Gothog.) 

 spinosus. 



Retiolites (Gothograptus) nassa (Holm). Plate XXXIV, figs. 15 a — d. 



1890. Betiolites nassa, Holm, Gotlauds Graptoliter, Bihang till k. Svenska. Vet.-Akad. Haiidl., vol. 



xvi, pt. iv, no. 7, p. 25, pi. ii, tigs. 12 — 14. 

 1897. GothograjLttus nassa, Freeh, Lethea Geognostica Palaeozoica, p. 670. 

 1900. Betiolites (Gothograptus) nassa, Wood, Quart. Journ. Geol. Soc., vol. lvi, p. 486, pi. xxv, fig. 



30, and text-fig. 27. 



