LECANOCRINIDAE 1 59 



Calpiocrinus rotundatus n. sp. 



Plate VIII, figs. 6-8 



Of the type of C. fimbriatus, but differing in the form of the crown, which 

 is ovoid and much more broadly rounded below. The calyx walls are evenly 

 curved, without depressions or unevenness of any kind above the IIIBr, and 

 the lower part of the rays less convex than in the preceding species. Height to 

 width of normal specimen at widest point about i to 2, and spread of calyx from 

 base to I Ax, i to 3. Crown of this specimen, 23 mm. high by 15 mm. wide at 

 IIBr2 ; base, 5 mm. There is also a difference in the column, which while large is 

 composed of relatively much shorter columnals, with alternation of still shorter 

 ones from the calyx down; it tapers gradually toward the root, and has three 

 internodals in the lower part. Surface smooth. 



This species is proposed upon a nearly perfect specimen from Gotland, which is a fine 

 and characteristic example of the genus (PL VIII, figs. 6a-c), but does not agree with C. 

 fimbriatus. It has the stem almost complete ; which probably ended in an encrusting root for 

 firm anchorage in shallow waters. I also refer to it another specimen in the Riks Museum 

 which has a considerably shorter and more globose crown; if this is not due to vertical com- 

 pression, then the difference from C. fimbriatus is still further emphasized. 



Types. Author's collection (PL VIII, fig. 6), and Riks Museum (fig. 7). 



Horizon and locality. Silurian, Wenlock Group, horizon f ; Bara, Island of Gotland. 



( ?) Homalocrinus peculiaris n. sp. 

 Plate VII, figs. 6a-c 



This singular specimen, which appeared among material collected for me at Wisby, in all 

 probability belongs to the type of the Homalocrinoids. The infrabasals are broken away, but 

 the appearance of the base, when compared with figures 4b and Jc of Plate VIII, leaves little 

 doubt that they overlapped the basals and reached to the radials. It is peculiar in having but 

 one primibrach, so that the radial is directly succeeded by an axillary, and in the second range 

 there are but two plates, as happens occasionally in Homalocrinus. The right posterior ray 

 has an extra plate below the axillary, the lowest one being larger than the radial in the other 

 rays, and this may be taken as a radianal — though relatively too large for that plate in a 

 normal specimen. The heterotomy of the arms is rather that of Homalocrinus, with the 

 ramules branching again ; and in default of any better disposition we may suppose it to be a 

 specimen of that genus which has dropped one primary brachial all around. So I have con- 

 cluded to give it a name and let it go at that. 



Type. Author's collection. 



Horizon and locality. Silurian, Wenlock Group, horizon /; Wisby, Gotland. 



