98 Bulletin, Vanderbilt Marine Museum, Vol. IV 



instances, on the same ray is a much smaller, subacute spine. The 

 ampullae are in two irregular series, so crowded mid-way the ray as 

 to appear quadriserial. The pedicellariae are quite small and rather 

 numerous on the abactinal side of the rays near the tip ; on the actinal 

 surface there are also pedicellariae ; occasionally quite large, forficate 

 pedicellariae are found here. The mouth depression is characteristic. 

 The madreporite is small, convex, subcircular, button-like, about four 

 times the long diameter of nearby spines, and shows numerous, fine, 

 irregularly radiating lines. 



References: Asterias multiradiata Gray, Ann. Mag. Nat. Hist., 6, 



p. 180, 1841. 

 Ileliaster multiradiatus Dujardin and Hupe, Hist. Nat. Zobp. Echi- 



nodermes, p. 344, 1862. — H. L. Clark, Bull. Mus. Comp. ZooL, 



LI, p. 46, pi. 4, fig. 1, 1907-08. 

 Ileliaster multiradiata Verrill, Trans. Conn. Acad. Arts & Sci., I, 



p. 292, 1867. 



OPHIUROIDEA. 



PHRYNOPHIURIDA. 



Family: OPHIOMYXIDAE. 



Genus : OPHIOMYXA Muller and Troschel. 

 Ophiomyxa pentagona (Lamarck). 



Plate 58. 



Type: Lamarck's type came from Sicily and is deposited in the 

 Paris Museum. 



Distribution: An abundant littoral species in the Mediterranean, 

 also found on the African coast down as far as Cape Verde, and on 

 the northern coast of Spain. Bathymetric occurrence : Chiefly littoral, 

 but recorded from depths down to 235 meters. 



Material examined: One specimen, dredged in 35 fms., 5 miles 

 N. E. by N. of Cape Carthage, Gulf of Tunis, Mediterranean Sea, 

 July 21, 1927, by the "Ara." One specimen, dredged in 100 fms., 

 9V2 miles E. by S., V2 S. "from Cape Bon Tunis, North Africa, July 

 19, 1927, Cat. no. 233. 



Color : Brown with dark flecks. 



Development : Unrecorded. 



Technical description : Disk diameter, 21 mm. ; length of arm, 75 

 mm. Disk pentagonal with the interbrachial lateral margin slightly 

 concave. The abactinal, actinal, interbrachial surfaces of the disk 



