250 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLDME 1 



the exterior tlirougli tLe funnel-shaped projection already described. That this 

 canal was a modified anibulacral groove was shown by the epitlielial cells that lined 

 it, which were precisely similar to those that line the ordinary anibulacral grooves; 

 and further evidence in the same direction was afforded by the presence in its walls 

 of numbers of the deeply staining problematical bodies which are invariably seen 

 in sections through tiie anibulacral groove of tiiis species. Beneath the epithelium 

 of tlie ambulacra! grooves the nerve band can be recognized without difficulty 

 on most sections. The circular water vessel and radial water vessels were also present, 

 and from (he former a considerable immber of water tubes depended into the body 

 cavitj'. Water pores traversed the body wall in all the sections. But the skeletal 

 and axial nervous systems present in the nornud disk and the central plexus were 

 entirely absent in the supernumerarj' one. 



Mr. Chadwick, adopting a suggestion from Prof. A. Milnes Marshall, supposed 

 this condition to have arisen from incomplete evisceration. 



Parasites. — In addition to the parasites already given for Antedon mediierranea 

 (vol. 1, part 2, p. 684) Vogt and Yung (1887) mention an undescribed (?) copcpod 

 which lives embedded in the tissues of specimens from Naples. This is probably 

 simihir to the crustacean reported by P. H. Carpenter as found embedded in the disk 

 of Ihliometra glacialis (vol. 1, part 2, p. 440). 



Localities. — Mediterranean Sea [Lamarck, 1816, and many succeeding authors] 

 (13, CM. ; L.M. ; P.M. ; II.M.) Type locahty. 



Palma (Huelva), on the Bay of Cadiz [Aranda y Millan, 1908]. 



Near Gibraltar [von Graff, 1887]. 



Southern and eastern Spain. Malaga [Busch, 1849; MacAndrew, 1851] (2, 

 CM.). Valencia [Aranda y Millan, 1908]. Machina [Aranda y Millan, 1908]. Bar- 

 celona [Aranda y Millan, 1908]. Blanes [Aranda y Millan, 1908]. Between Blanes 

 and San Feliu de Guixols; 94 meters [Pruvot, 1901]. North of Cape San Sebastian, 

 Province of Gerona; 142-116 meters [Pruvot, 1901]. Rosas [Lacaze-Duthiers, 1891]. 

 ?Minorca, Balearic Islands [Braun, 1886]. Majorca; Xauen stas. X 2, lat. 39°31' N., 

 long. 8°44' E., X 8, lat. 39°18' N., long. 9°5' E.; 55 meters [Rivera, 1934]. 



France. Coast of France (16, P.M.). Banyids-sur-Mer [Pruvot, 1891, 1895, 

 1897; Aranda y Millan 1908; Bohn, 1911; Chalaux, 1935; Tortonese, 1956]. Roches 

 Cannalots, near Banyuls [Pruvot, 1895]. Port Vendres (just north of Banyuls) [Bau- 

 delot, 1872; Lacaze-Duthiers, 1891]. Cette [Leuckart, 1833; Koelder, 1894; A. H. 

 Clark, 1911] (8, ALC.Z., 242; P.M., one from P. Gervais). Cette, Frontignan jetty 

 [Lacaze-Duthiers, 1891]. Gidf of Lyon [Pruvot, 1897]. Marseille [Marion, 1878, 

 1883; Ludwig, 1879; Cams, 1884; A. H. Clark, 1911] (about 50, P.M., M. Deshaycs, 

 1874). Bay of ^farseillc [A. H. Clark, 1913] (4, B.M.). Same, 60-80 meters [A." H. 

 Clark, 1913] (1, B.M.). West side. Gulf of Marseille; 3-36 meters; bottom, Zustera 

 and algae [Vayssierc, 1919]. Vicinity of Marseille; Bassin national, 0-2 meters; 

 at the head of the gulf, at Pharo, Madrague, Cape Janet, Mouripiano, Point Rouge 

 de Montredon, and Fond des Calanques; off Mejeau; south of Rion and Planier, 

 100-200 meters [Marion, 1883]. La Ciotat [Koehler, 1894]. Toulon [Dujardin, 

 1835, 1862; J. Barrois, 1888; Bonnet, 1928]. Hycres [A. H. Clark, 1911] (1, P M.). 

 Nice (Nizza) [Risso, 1826, and many succeeding authors] (4, M.C.Z., 241; B.M.; 

 H.M.). Villefranche (Villafranca) [J. Barrois, 1888]. Same, 80 meters [Koehler 

 and Vaney, 1910]. 



