130 F. A. BATHER, CRINOIDEA OF GOTLAND. 



Cyathocrinus visbycensis, n. sp. 



(Plate VII, figs. 199—206.) 



[1878 Cyathocrinus monilifer, Angelin, Iconographia, p. 23, Tab. XXI, figs. 15, 15 a.] 



[1878 Cyathocrinus l&vis, Angelin, Iconographia, p. 23, Tab. XXVI, figs. 3, 3 a, '6 b, nou figs. 2, 2 a.] 



In the shale bods c, on the shore between Wisby and Weskinde, there occur manv 

 cups, sometimes with portions of stem, of a rather variable species. The variability of 

 the species occasionally amounts to eccentricity and abnormality, and two very different 

 and abnormal specimens have been figured by Angelin under the names C. monilifer and 

 C. Icevis. Recent accessions of material show that the forms which Angelin not un- 

 na ti irally considered distinct belong to one and the same species. 



Angelin's diagnosis of C. monilifer, translated, runs as follows: »Plates ornamonted 

 with raised points representing moniliform figures.» One specimen from Wisby is the 

 type, No. 138 RM. or 57 Ang. This specimen is abnormal, though this is not seen in 

 Angelin's figures; but in bis unpublished analysis its plates are correctly drawn. The 

 cup is distorted, so that, while the height of the posterior side is only 7 mm., that of the 

 antcrior is 10.2 mm., and all the plates on the anterior side are liigher than the corre- 

 sponding ones on the posterior side. The main abnormality, however, lies in the fa et 

 that the right and left anterior basals are fused into a heptagonal plate shaped like the 

 posterior basal, which plate supports the anterior radial by its truncate upper side; the 

 anterior radial consequently has a truncate base. The ornament that constitutes Angelins 

 diagnostic character consists of a slight moniliform ridge, parallel with the edges of the 

 plates, at a distance of about 0.75 mm. from the suture. 



The diagnosis of C. Icevis runs thus: »IBB pentagonal, equal; BB hexagonal; RR 

 large; Ventral tube of very unequal plates.» This ean hardly be considered as a diagnosis 

 at all. The only diagnostic character, that of the tube, is unsupported by both figures 

 and specimens; for not one possesses a ventral tube, while the few plates that are preserved 

 are perfectly normal. Moreover neither the specimens nor the figures, so far as they are 

 correct, correspond with the description. The type-specimens belong to two distinct spe- 

 cies; and, what is more curious still, both are abnormal. That figured in 2, 2a is a bat- 

 tered calyx of C. ramosus and will be further alluded to under that species. The cup 

 figured in 3, 3 a, No 143 RM or 118 Ang., is said to come from Likkershamn. The 

 drawings, though susceptible of much improvement, show the very interesting abnormality, 

 namely, the transverse bisection of the left anterior basal into plates of distinct individu- 

 ality. Both plates are fairly regular pentagons; the lower is shorter than the upper. The 

 adjacent basals are in consequence heptagonal. In other respects this specimen does not 

 agree with the diagnosis; the radials, for instance, cannot by the widest stretch ol ima- 

 gination be described as magna». 



It seems, therefore, impossible to lake either of these abnormal specimens as the type 

 of the species to which the)- belong. Since moreover the diagnoses are inadequate or in- 

 eorreet and the names inisleading, it seems advisable to give a new name to the whole 

 species, while Angelin's names may be used, if reqnired, to designate the two varieties, to 



