KONGL. SV. VKT. AKADEMIENS HANDLINGAR. HAND. 



25. 



n:<> 



133 



exceptional. It may be advisable to rctain Angelin's names to express these two varieties, 

 which differ in no other character. 



Notes on Angelin's figures: 



These have already been alludéd to under tlie headings C, monilifer and C. leevis 

 at tlie beginning of the account of this speeies. Tal). XXVI, fig. 3 b has been redrawn 

 bv Mr. Liljevall for Wachsmuth and Spkingek {op. dt.): see also our text-tig. 19. 



Localities: Between Wisby and Weskinde, Snäckgärdet, Likkershamn: all bed c. .A 

 verv doubtful specimen is said to eoine from the Klinteberg, bed f. Not known ont of Gotland. 



Text-fig. 19. Cyathocrinus visbycensis, tegmen; 

 original of Angelin, Tal). XXVI, fi«'. 3 b. 



Cyathocrinus acinotubus. 



(Plate VII, figs. -207—217.) 



1878 Angelin, Iconographia, p. 22, Pl. XX, fig. 5. 



1878 Cyathocrinus alutaceus, Angelin, Iconographia. pl. IV, fig. Ii a. 



1892 C. acinotubus, Bather, .Brit. Foss. Crin. VIII Ann. Mag. Ntit. Hist. ser. 6, vol. IX, p. 213. 



Diagnosis. 



Cup bowl-shaped, rather rounded at tlie base; plates tumid. Arms rather stout, 

 with rounded ossicles; covering-plates long and conical, 2 or 2 1 2 to each ossicle. Ventral 

 sa-c large, slightly swollen above; its plates protuberant and rugose. Steui round, with 

 alternate-sized ossicles. 



It is a fortunate thing that only one specimen bearing this narne was figured by 

 Angelin, for, sinee that specimen is preserved, there can be no doubt as to the type of 

 the speeies. There is another specimen, halt" the size of the figured one, that was found 

 to have been so labelled by Angelin, and it is apparently of the same speeies. The spec- 

 imen represented in Tab. IV, tig. 6 a, as C. alutaceus, is a small but typical specimen 

 of C. acinotubus; the surface of the cup-plates has a eoarse rugosity it is true, but this 

 is produced by weathering; the priinibrachs also varv considerably in height, but this is the 

 case in many speeies. These three specimens may be designated a, b and c respectively. 

 a and b are numbered 141 RM., and c is 122 Ang. or 130 RM. No. 149 RM. (d) is a 

 small but good specimen of unknown locality. Beside these there are two cups from Wisby, 



