108 Mr. F, A. Bather on the 



question. But such facts as are undisputed all indicate that 

 this is nothing but a large species of Abacocrinus, although 

 that genus has 4 basals and a proximal anal resting on 

 the base. 



Laubeocrinus Barrandei is a new genus and species based 

 on an incomplete cup provided with 3 millimetres of stem, 

 from the white limestone, e 2, of Lochkov (Fig. 3) . No attempt 



Fig. 3. — Analysis of the cup of Laubeocrinus Barrandei, outlines copied 

 from Waagen and Jahn, nat. size. Shading as in fig. 1. 



is made by the authors to determine the systematic position 

 of this genus. The peculiarities of the specimen are, indeed, 

 such that they might be considered individual abnormalities ; 

 but if that had been the opinion of Messrs. Waagen and 

 Jahn, they would scarcely have based a new genus on them. 

 " It is," they say, " impossible to determine if the base is 

 monocyclic or dicyclic " ; but since the basals are 4, not 5, 

 we have every reason to believe that it is what it appears to 

 be, namely, one of the Monocyclica Camerata. The fused 

 basals are the right posterior and right anterior. The proximal 

 anal rests on the base ; but instead of the posterior basal 

 being widened and truncated to support it, the left posterior 

 basal is widened to occupy the whole of the left posterior 

 radius, and so to come into contact with the anal. Both of 

 these features are without parallel in accepted genera. Con- 

 sidered by itself, the base is like that of Compsocrinus or 

 Abacocrinus (members of the family Xenocrinidas), but in 

 them the larger basals are posterior and anterior. The re- 

 maining portions of the cup might belong to any typical 

 Actinocrinoid. The anal area differs from that of the Xeno- 

 crinicla?, and, indeed, of all known Batocrinoidea, in the 

 presence of only two plates in the second row. Phillipso- 

 crinus, M'Coy, is believed by Wachsmuth and Springer to 

 have been based on an abnormal specimen of Actinocrinus, 

 and it is noteworthy that the peculiarity is similar to that of 

 Laubeocrinus, though still more abnormal. 



