146 P. A. BATHER, CRINOIDEA OP GOTLAM). 



the limits of a single speciraen, but it is not härd to see the connection between the 

 second type of structure lierein described and the normal type in C. loncjimanus. A more 

 important difference appears to be the less width of the ventral groove as compared with 

 the brachial; this, however, is a feature that is well known to vary with the pressure 

 that a fossil has undergone. For the present then this form may fittingly be retained in 

 the neighbourhood of the preceding species. 



Locality: Follingbo (f). 



Cyathocrinus ramosus. 



(Plate VIII, figs. 248—260.) 



L878 Angelin, Iconographia, p. 22, Tab. XX, fig. 1; non figs. 2, 3. 



1878 Cyathocrinus alutaceus ANGELIN, op. rit. p. 23, Tab. XXIII, figs. 10, 10 a — b, 11; non Tab. IV, 



fig. I! a. 

 1878 Cyathocrinus leeois, Angelin, op. cit. p. 23, Tab. XXVI, figs. 2, 2 a; non figs. 3, 3a — b. 

 1878 Cyathocrinus sonatus, Angelin, op. cit. p. 22, Tab. VI, fig. 5. 

 1878 Cyathocrinus longimanus, Angelin, op. cit. p. 22, Tab. XXVI, figs. 4, 4a — c, 5, 5a — b; non 



Tab. XX, figs. 4, G, 7. 



Dia^nosis. 



Dorsal Gup with height less than 2 ., width ; with straight sides, at an angle of 

 30 — 40° to the vertical. IBB twice as wide as high. BB wider than high. RR nearlv as 

 high as wide. Cup-plates plane, but slightly depressed at the sutures. Arms dichotomise 

 regularly down to VIIBr, fairly stout, with long, straight series. Arm-ossieles shagreened: 

 covering-plates 1 or l 1 / i to an ossicle. Ventral sac narrow, tubular, composed of small, 

 irregular plates. Stem rather wide, with very low ossicles. 



There are a very large number of specimens belonging to this species in the Riks- 

 museum, and it has beeri a mattor of some diffieulty to separate them from the specimens of 

 the closely allied C. Ioikji manus. This was in fact impossible, until it was recognised that the 

 covering-plates differed in number in the two species. Even this character, however, is härd 

 to see in many specimens, so that it has not been possible to determine with confidence 

 every fragment in the State Museum. 



The chief specimens are as follows: (a) crown and part of stem, original of Tab. 

 XX, lig. 1; (b) part of crown and stem, original of Tab. XXIII, figs. 10, 10 a — b; (c) calyx, 

 original of Tab. XXIII, fig. 11; (</) an old, strongly marked, fragmentarv crown, original 

 of Tab. VI, lig. 5; (e) a small crown with arms showing covering-plates, No. 161 RM, 

 original of Tab. XXVI, figs. 4, 4 a — c; (/) No. 165 RM, with arms showing covering- 

 plates, original of Tab. XXVI, figs. 5, 5 a — b; (g) a large and characteristic specimen; 

 (//) a somewhat battered, slightly abnormal calyx, No. 144 RM or 180 Ang., original of 

 Tab. XXVI, figs. 2, 2 a. There are besides many speeimens that probably belong to this 

 species, but that cannot be accurately determifted without dissection. 



The small specimen referred to this species by Angelin, and figured in lus Tab. XX, 

 figs. 2, 3, probably belongs to C. longimanus. At all events it does not show what 

 appear to be the essential characters of the present species so far as the cup and arm- 



