144 MESSRS. A. J. JUKES-BROWNE AND W. HILL : [May 1 896, 



no specimen came to hand from Cape La Heve, though d'Orbigny 

 quotes it from there. It is a well-marked species, much more 

 elevated than H. minimus, the anal area being very high and rising 

 almost vertically from the base. 



We have not seen anything like this species in England, and 

 Mr. Meyer informs us that the Spatangus bufo of his Devon list in 

 1874 was a mistake, a better specimen having enabled him to 

 identify it as Hernia ster Morrisii. Mr. Sharman, to whom we sent 

 specimens, compared them with all the Cretaceous Hemiasters in the 

 Jermyn Street Museum, and did not find any resembling them. 



Holaster sub orbicularis, Brongn,, figured by d'Orbigny, ' Pal. Fr. 



Terr. Cret.' vol. vi. p. 93, pis. 814 and 815. Hoi. suborbicularis, 



Wright, ' Brit. Cret. Echin.' Pal. Soc. Monogr. p. 314, pi. lxxiv. 



fig. 1. 



We do not think that the figures above referred to represent the 



same species. D'Orbigny's figure is that of a rather large cordiform 



urchin, much resembling Cardiaster fossarius. He describes it as 



specially characterized by the bulging out of the under surface in 



the hinder part, so that its greatest height is in this posterior 



region. Moreover it has a depressed anal area, and the vent is 



small and placed in the upper part of this area. The anteal sulcus 



is rather deep. 



Dr. Wright's figure does not show these characters ; there is no 

 such marked anal area ; the vent is large and not very high up. 

 There is no such promineut basal protuberance. The test is very 

 different in shape, and is very much smaller. He himself says that 

 ' the English specimens are small and resemble the urchin described 

 as Holaster cenomanensis, d'Orb., which, however, is only a small 

 variety of Hoi. suborbicularis. ,' He also states that it occurs plen- 

 tifully in the Chalk Marl and in its glauconitic basement-bed. 



This last statement is incomprehensi! le to us, as we have col- 

 lected largely from these beds, but have seen very few specimens 

 that will compare with Wright's figure of Holaster suborbicularis, 

 and none like d'Orbigny's figure. Moreover, in Dr. Barrois's well- 

 known ' Researches in the Cretaceous Formation of England ' we 

 find only one mention of Holaster suborbicularis (?), and this is 

 from the Upper Greensand. 



Mr. Meyer informs us that he has some specimens from Bed 11 

 in Devon which agree with Wright's figure and a few which come 

 near to that of d'Orbigny. We have therefore admitted both forms 

 into our list. 



Holaster, sp. 



One of the commonest echinoderms in the zone of Ammonites Man- 

 telli on the Devon coast is a form which differs from any yet described. 

 A single specimen might be taken for a small elevated and oval variety 

 of Holaster subglobosus ; but, as that species occurs in the same beds 

 and exhibits individuals of all ages, this form is either a different 



