Sir H. S. Hoicorth — Erratic Boulders in Drift. 123 



usually lias the plates of its cup wider than high. According to 

 De Loriol (" Paleontologie Frangaise, Terrain Jurassique, Crinoides," 

 p. 319), the first and second priniibrachs oi Miliericrinus are united 

 by synostosis ; here the evidence seems to point to a more flexible 

 union. Moreover, one may adduce the apparent compound nature 

 of IBri as a condition that has never been found in any Apiocrinid, 

 except the very different Calamocrinns of modern times. The 

 secundibrachs too, with their delicate pinnules, have not the w^ide 

 and thickset appeai'tince so characteristic of nearly all Apiocrinid 

 arms known to us. 



It must, of course, be remembei-ed that some of these features are 

 those of youth : such especially are the relatively large basals and 

 the fine pinnules. Nevertheless, all cannot be thus explained away, 

 and it must be admitted that the species is distinct, not only from 

 other known species of Millericrinus, but from the general type of 

 the genus and of the family Apiocrinidge. Indeed, apart from the 

 proximal cone of the stem, perhaps even with that encumbrance, 

 there seems small reason why this form might not just as well be 

 placed along with Dadocrimis, either in the Encrinida3, where Dado- 

 crinus is placed at present, or in some fresh systematic pigeon-hole. 



The facts, then, seem to lead us to the conclusion that the 

 Apwcriniis recubariensis of Crema is a form intermediate between 

 the Encrinid^ and Apiocrinidge. Its nearest allies are, on the one 

 hand, the Encrinid that other considerations have already brought 

 us to regard as near the ancestor of both Pentacrinidse and 

 Apiocrii:iida?, as shown in my paper " Tlintacrinus : a Morpho- 

 logical Study" (Proc. Zool. Soc. 1895-6, pp. 974-1004), namely 

 Dadocrimis ; on the other hand, the genus that is clearly the least 

 specialized Apiocrinid, namely MiUericrinus. Considering the 

 obviously immature characters of the specimen before us, it would 

 be unwise to make it bear the weight of a distinct generic name. 

 I shall therefore, somewhat arbitrarily, consider the proximal cone 

 of its stem as entitling it to association with Millericrinus rather 

 than with Dadoerinus, and so leave with Dr. Crema the honour 

 of having been the first to make known the presence of an Apiocrinid 

 in strata below the Lias, and of a complete Millericrinus in beds 

 older than the Inferior Oolite. 



It will now, I hope, be understood that Millericrinus recubariensis 

 is a form of singular interest, and that others besides myself may be 

 grateful to Dr. Crema and Professor Parona for having sent it over 

 laud and sea to be described and figured in greater detail. 



VI. — On the Erkatic Bouldeks and Foreign Stones in the 



Drift Deposits of Eastern England, and their Lessons. 



By Sir Henry H. Howouth, K.C.I.E., M.P., F.R.S., F.G.S. 



HAVING already discussed the contents, the distribution, and 

 general facies of the widely-spread deposits of Eastern England, 

 which together make up the series classed as Glacial beds, namely, 

 the Post-Tertiary clays, sands, and gravels which have been supposed 

 to attest an Ice period ; and also set out the reasons why, to 



