g ECHINOIDEA. II. 



Suborder Clypeastroidea. 

 Fam. Fibulariidae. 



i8. Echinocyamus pusillus (O. F. Mviller). 



PI. XII. Figs. 4, 6, 9, iS— 20. 22, 23, 26, 27, 29—31. 

 Principal .sviion\nis: Echiuocyaviits angulosiis Lcske. 

 Fibxhiria tnrentina Lamarck. 

 Echinocyamus parthciiopcrus Co.sta. 

 — speciosHS Costa. 



Principal literatnre: O. F. Miiller: Zoologise Danicse Prodronms. 1776. p. 236. Zoologia Danica. 

 III. 1789. p. 18. Tab. XCI. Figs. 5—6. — Leske: Additamenta. 1778. p. 215. — Lamarck: Animaux 

 sans vertebrcs. 1816. p. 17. — Forbes: British Starfi.shes. 1841. p. 175. -Monograph Echinoderms Brit. 

 Tertiaries. 1852. p. 10. PI. I. — L. Agassiz: Monographies d'Echinodermes. IL Des Scntellcs. 1841. 

 p. 1 28. 130. PI. XX\'II. Figs. I— 8, 14—18. — Philippi: Beschr. einiger neuen Echinodermen etc. Arch, 

 f. Natnr"-esch. 1845. p. 356. — .\gassiz & Desor: Catalogue raisonne des Echinod. 1847. p. 82. — 

 Diiben & Koren: Skandinaviens Echinod. 1844. p. 279. — M. vSars: Norges Echinodermer. p. 95. 

 Middelhavets Littoralfanna. p. 116. — Heller: Zoophyten u. Echinod. d. .\driat. Meeres. 1868. p. 66. 



— Costa: .Monografia degli Echinocyami viventi e fos.sili delle Provincie Napolitane. .\tti R. Acad, 

 .sci. fi.s. e matem. Napoli. III. 1867. (No. 14) p. 4. PL I. i — 2. — A. Agassiz: Revision of Echini, p. m, 

 304. PI. Xl.e. 3. — Loven: Etndes sur les Ech. PI. XVI. 139. PI. XLIV; Echinologica. PI. IX. 102-9. 

 XI. 141. 145. — Cnenot: Etndes morphologiqnes snr les Echinoderme.s. Arch, de Biologic. XI. ^891. 

 PI. XX I \'. I-'ig.s. 9, 16. — Theel: Development of Echinocyamus pusillus. 1892. — Koehler: Echi- 

 mdes et Uphiures ... de rHirondelle. (229)'. 1898. p. 24. — Ludwig: Echinod. d. Mittelmeeres. p. 559 



— Bell: Catalogue Brit. Echinoderms. p. 160. PL XVI. 8—9. -- Hoyle: Revised Li.st Brit. Echinoidea 

 p. 419. — Airaghi:^ Echinidi Terziari del Piemonte e della Lignria. Palaeontogr. ital. VII. 1901. ]). 178. 

 PI. XXII. — Grieg: Oversigt over det nordlige Xorges Echinodermer. 1902. p. 32. — Dodeilein: 

 Archtische Seeigel. Fauna .Yrctica. 1905. p. 382. Die PIchinoiden der deutschen Tiefsee-Plxiiedition. 

 1906. p. 234. 



Non: A. Agassiz: Rexi.sion of I'.cliiiii. Pl.XIll. 1—8. Blake -lichinoidea. p. 40. Challenger - 

 Echinoidea. p. 118. — I'crnard: (78)'. 



For other less important literatnre reference may lie made to Revision of Echini , Ludwig: 

 Echinod. d. Miltelm., Bell: Catalogue Brit. P^ch. and Hoyle: Rev. List I'rit. Ech. 



Tiiougli tliis species has been so often described I must make some additional remarks on it, 

 wliich I think will not prove to be superfluous. 



.Vgassiz has made the important observation that small pores occur along the horizontal 

 sutures of the ambulacra as in other Clypeastrids '; a.s, however, his description and figures are not 



I Thu mimber rt-fcrs to the biblioj^aphical list in I'.irl I. 

 ' Cited after Zoological Record. 1901. — Not seen b\- me. 

 J Job. Miiller: Ban der Hchiuodennen. Abhandl. d. .^cad. Herlin. 1S53. 



