Keywords: The Quarterly journal of the Geological Society of London (12471589744).jpg 1865 <br> DTTKCAN ASIATIC ECHINODERMATA <br> 355 <br> Chalk in the form of a variety which is subconical and not so much <br> depressed as the type and that both have five generative pores <br> The small tubercles which are crenulated and perforated the <br> position of the anus and the general form of the test are repeated <br> sufficiently to admit the following under one species The series will <br> then stand thus Holectypus Cenomanensis Gueranger Varieties <br> 1 some French unnamed forms which vary very slightly from the <br> type ; 2 var 1 from South-eastern Arabia ; 3 var 2 from South- <br> eastern Arabia ; 4 var Turonensis from the Lower and Upper Chalk ; <br> 5 Yav planatus from Texas The species follows the law that those <br> widely dispersed vary greatly ; and its great diffusion both in area <br> and in depth is very remarkable <br> II CiDAUis CENOMANENSIS Cottcau The variety of this species <br> differs from the type in having the second or internal two rows of <br> grannies in the ambulacral spaces barely developed The primary <br> or external rows are like those of the type and extend to the summit <br> occupying the interporiferous zone for some distance This difference <br> is insufficient to be specific ; but its recognition as pertaining to a <br> variety throws some doubt on the propriety of separating C Ceno- <br> manensis from 0 vesiculosa these species differing only in the granu- <br> lation of their ambulacral spaces <br> III Hemiasteb similis D'Orb There is a variety of this species <br> in South-eastern Arabia and a second at Bagh Both have wider <br> spaces between the rows of pores in the ambulacra than the type <br> and the test is generally more globular than in the European speci- <br> mens ; moreover the posterior ambulacral areas are a little longer <br> than in the type but stiU they are very short The Bagh variety is <br> broader and more globular than the South-eastern Arabian <br> Figs 2-4 Illustrating the structure of Cottaldia Carteri <br> Fisj 2 <br> Fiff 4 <br> Fig 2 <br> 3 <br> Cottaldia Carteri side view natural size <br> The same diagram of the apical disk <br> 4 The rame diagram of an ambulacral space poriferous rones c 34892029 108495 51125 Page 355 Text v 21 http //www biodiversitylibrary org/page/34892029 1865 Geological Society of London NameFound Cenomanensis NameFound Cottaldia NameConfirmed Cottaldia EOLID 4711555 NameBankID 4127076 NameFound Echinodermata NameConfirmed Echinodermata EOLID 1926 NameBankID 2560154 NameFound Hemiasteb similis NameConfirmed Hemiaster Hemiaster similaris Stoliczka 1873 NameFound Holectypus NameConfirmed Holectypus EOLID 4710484 NameBankID 4196506 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 21 1865 Geology Periodicals Smithsonian Libraries bhl page 34892029 dc identifier http //biodiversitylibrary org/page/34892029 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-12 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12471589744 2015-08-27 10 00 35 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1865 Photos uploaded from Flickr by FĂŚ using a script |