THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SIXTH SERIES.] 

 No. 41. MAY 1891. 



XLI. — British Fossil Crinoids. — V. Botryocrinus, Wenlock 

 Limestone. By F. A. Bather, M.A., F.G.S. 



[Plate XIII.] 



History of Opinion. 



The genus Botryocrinus was founded in 1878 by N. P. 

 Angelin to include certain fossils from Follingbo in Gotland. 

 The name, derived from /3orpv<i, a bunch of grapes, appears 

 to have been suggested by the peculiar branching of the arms 

 in the specimens known to Angelin (see ' Annals,' ser. 6, 

 vol. v. pi. xv. fig. 9, illustrating Brit. Foss. Crin., II.). 



On p. 24 of Angelin's ' Iconographia Crinoideorum ' is the 

 following diagnosis: — "Corpus elongatum, dendroideum, 

 corymbosum. Calyx parvus, cyathoideus. Basalia quinque 

 alta, pentaedra. Parabasalia quinque hexaedra. Radialia 

 tria in unaquaque serie ; prim aria maxima, heptaedra, lata. 

 Anale singulum clypeiforme. Interradiale singulum, rhom- 

 beum, anale, radiale primarium et parabasalia duo tangens. 

 Brachia bidigitifera ; digiti ramusculos alternantes, multifidos 

 emittunt. Tubus ventralis crassus, curvus, apice obtuso. 

 Columna articulis tenuissimis, creberrimis." 



This may be translated as follows into English and into 

 modern terminology : — ■ 



Ann. & Mag. N. Hist. Ser. 6. Vol vii. 27 



