390 Mr. F. A. Bather on British Fossil Crinoids : 



Crown elongate, tree-like, clustered. 

 Dorsal cup small, bowl-shaped. 

 IB. 5, high, pentagonal. 



B. 5, hexagonal. 



R. wide, heptagonal. 



C. 2 in each ray, smaller than R. 

 x shield-shaped *. 



R' rhomboidal, touching R. and 2 BB. 



Main arms 10, bearing alternating much branching 

 armlets. 



Ventral tube stout, curved, with blunt apex. 



Stem-ossicles very fine and very numerous. 

 Of this genus Angelin described two species, B. ramos- 

 issimus and JJ. corallum, and these are the only ones hitherto 

 described. But a recent examination of the type specimens 

 and of others inclines me to believe that all these belong to 

 the same species ; that species will bear the name B. ramos- 

 issimus. 



There was, however, another species described by Angelin 

 and referred by him to another new genus under the name of 

 Sicyocrinus cucurbitaceus. The diagnosis of this genus on 

 p. 23 of the ' Iconographia ' is as follows : — " Corpus corym- 

 bosum. Calyx cyathoideus. Basalia quinque, subaequalia. 

 Parabasalia quinque, hexaedra, una cum interradiali parvo, 

 rhomboideo. Radialia 4x5: primaria quinque majora lunu- 

 lata. Anale secundum maximum. Analia superiora tubum 

 ventralem conficiunt. Brachia quinque, articulis longiusculis, 

 inaequaliter dichotoma. Columna quinquangularis ex arti- 

 culis latioribus et angustioribus constat, foramine centrali." 

 Which being interpreted is : — 



Crown clustered. 



Dorsal cup bowl-shaped. 



IB. 5, subequal. 



B. 6, hexagonal. 

 R. lunulate. 



C. 3 in each ray, smaller than R. 

 x very large. 



R' small, rhomboidal. 



Main arms 5, with rather long ossicles, unequally dichoto- 



mous. 

 The upper anals form a ventral tube. 

 Stem pentagonal ; ossicles alternately wider and narrower, 

 with an axial canal. 

 The points added to this in the specific diagnosis, p. 24, are 



* The symbol x will, for its greater convenience, be used in future as 

 equivalent to X of previous papers. 



