120 F. A. BATHER, CRINOIDEA OF GOTLAM). 



In specimen / (tig. 174) the stem appears to be composed of very minute polygonal 

 plates, arranged irregularly in transverse lines (tig. 177). In plaees, and especially towards 

 the proximal end, these rnerge into more regular lines (fig. 175). At the distal end of 

 this stem are some rather large radicular cirri. The broken end of the stem shows con- 

 centric circles, apparently denoting suceessively formed layers (tig. 178): the stem is also 

 slightly swollen above the cirri. This swelling was perhaps indueed by the attacks of 

 boring parasites, of which there are traces: the raiddle of the stem also shows numerous 

 small pittings, irregular in disposition, which are probably the work of parasites (tig. 176). 

 But, although the breaking up of the stem into minute plates may be pathological, there 

 is nothing to eonnect it with the attacks of these parasites; for it occurs where there are 

 no traces of borings, and, in a slightly modified form, to the very proximal end of the stem. 



Notes on Angelin's figures: 



Tab. XV, fig. 9, 9 a. Specimen not found. 



Tab. XX, fig. 8. This gives a very good idea of the arms. 



Tal). XXXIII, tig. 14. This is not only much restored, but the numbers of the arm- 

 ossicles are incorrect, and the folding of the ventral sac is poorly indicated. 



Tab. XXIII, tigs. 15 and 16 are fair, but do not give a right impression of the 

 numbers of the brachial series. 



Tab. XXIV, fig. 4. Specimen not found. 



Localities: 



Specimens a, b, c, d, e, f and g are from Follingbo (f). Specimen // is from Dal- 

 hem (f). Arm-fragments have been found at Wisby (base of f), and Långomrae in Othem 

 (f). Not known out of Gotland. 



Botryocrinus cucurbitaceus. 



(Plate VI, figs. 180—193.) 



1878, Sicyocrinus cucurbitaceus, Angelin, Iconographia, pp. 23, 24, Tal). IV, fig. 9, Tab. XVI, fig. 5. 

 1882, Sicyocriuus cucurbitaceus, S. Loven in H. Trautschold, Bull. Soc. Imp. Nat. Moscow, vol. 



' LVII, pp. 140-145. 



1879, Botryocrinus (Sicyocrinus) cucurbitaceus, WaCHSMUTH and Springer, Kevision, I, 99. 



1891, Botryocrinus cucurbitaceus, Bather. Ann. Mag. Nat. Hist., ser. 6, vol. VII, pp. 391 — 393, and 407. 



Diagnosis. 



Dorsal cup a wide cone, with height about 6 / 7 width; plates smooth. Radial facet 

 projecting very slightly. Arms of long thin ossicles. Branching armlets are given off on 

 alternate sides of the two main arms in eacli ray; but these are folded inwards, so that 

 they are only seen on one side at a time. x supports three plates. of which the middle 

 one is longer than the others. Ventral sac bends first anteriorly then curves posteriorly; 

 it widens above, and the backward curved portion appears as though fused with the lower 

 part. Stem pentagonal, witli alternate sized ossicles. 



