ECHINOIDEA. II. 



Suborder Clypeastroidea. 

 Fam. Fibulariidae. 



iS. Echinocyamus pusillus (O. F. Miiller). 



PI. XII. Figs. 4, 6, 9, 18—20. 22, 23, 26, 27. 29—31. 

 Principal synonyms: Echinocyamus angulosus Leske. 

 Fibularia tarentina Lamarck. 

 Echinocyamus parthenopceus Costa. 

 speciosus Costa. 

 Principal literature: O. F. Miiller: Zoologiae Danicie Prodromus. 1776. p. 236. Zoologia Danica. 

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

 sans vertebres. 1816. p. 17. — Forbes: British Starfishes. 1841. p. 175. Monograph Echinoderms Brit. 

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

 p. 128, 130. PI. XXVII. Figs. 1 — 8, 14 — 18. — Philippi: Beschr. einiger neuen Echinodermen etc. Arch. 

 f. Naturgescli. 1845. p. 356. -- Agassiz & Desor: Catalogue raisonne des Echinod. 1847. p. 82. - 

 Diiben & Koreu: Skandinaviens Echinod. 1844. p. 279. - M. Sars: Norges Echinodermer. p. 95. 

 Middelhavets Littoralfauna. p. 116. — Heller: Zoophvten u. Echinod. d. Adriat. Meeres. 1868. p. 66. 



— Costa: Monografia degli Eehinoeyami viventi e fossili delle Provincie Napolitaue. Atti R. Acad, 

 sci. fis. e matem. Napoli. III. 1867. 1X0.14) P- 4- PI- I- l — 2 - _ " A. Agassiz: Revision of P^chini. p. 111, 

 304. PL XI. e. 3. — Loven: Etudes sur les Ech. PI. XVI. 139. PI. XLIV; Echinologica. PI. IX. 102—9. 

 XL 141, 145. — Cuenot: Etudes morphologiques sur les Echinodermes. Arch, de Biologic XI. 1891. 

 PL XXI\ - . Figs. 9, 16. — Theel: Development of Echinocyamus pusillus. 1892. Koehler: Echi- 

 nides et Ophiures ... de l'Hirondelle. (229) 1 . 1898. p. 24. -- Ludwig: Echinod. d. Mittelmeeres. p. 559 



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

 p. 419. -- Airaghi: 2 Echinidi Terziari del Piemonte e della Liguria. Palseontogr. ital. VII. 1901. p. 178. 

 PL XXII. — Grieg: Oversigt over det nordlige Xorges Echinodermer. 1902. p. 32. — Doderlein: 

 Archtische Seeigel. Fauna Arctica. 1905. p. 382. Die Echinoiden der deutschen Tiefsee-Expedition. 

 1906. p. 234. 



Non: A. Agassiz: Revision of Echini. PL XIII. 1 — 8. Blake -Echinoidea. p. 40. Challenger - 

 Echinoidea. p. 118. — Bernard: (78) 1 . 



For other less important literature reference may be made to Revision of Echini , Ludwig: 

 Echinod. d. Mittelm., Bell: Catalogue Brit. Ech. and Hoyle: Rev. List Brit. Ech. 



Though this species has been so often described I must make some additional remarks on it, 

 which I think will not prove to be superfluous. 



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

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



1 The number refers to the bibliographical list in Part I. 



2 Cited after Zoological Record. 1901. — Not seen by me. 



3 Job. Miiller: Ban der Echinodermen. Abhandl. d. Acad. Berlin. [853. 



