MUSEUM OF COMPARATIVE ZOOLOGY. 347 



Swedish frigate " Josephine," I was shown the Ophiuridae dredged in 117 

 fathoms on the newly discovered Josephine Bank, southwest of Lisbon ; 

 and among them I recognized two fine specimens of t/us very species ! We 

 have, therefore, the same animal living on two sides of the Atlantic, 

 and separated by nearly seventy degrees of longitude, but not yet 

 discovered in the many deep dredgings made off the British and Scandina- 

 vian coasts. 



Mr. Ljungman describes the color of the living creature as white under- 

 neath ; yellow bars on the arms, two or four joints wide ; a reddish spot 

 at the insertion of each arm ; a purple-gray, five-sided patch on the back 

 of the disc. According to M. de Pourtales, the arms are white with an 

 orange dorsal stripe; disk pink, with a greenish star; spines white, with 

 orange specks at their bases. 



ASTROPHYTID^I. 



Ophiocreas Lymax, gen. nov.* 



Disk and arms uniformly covered with soft skin bearing microscopic 

 grains. Disk small : its interbrachial outlines re-enteringly curved ; five 

 pairs of narrow, rather high, radial ribs, running from the margin quite to 

 the centre. Arms simple, very long and smooth ; the joints indicated by 

 very slight depressions. Small arm-spines standing just above the tentacles. 

 Teeth : one or more tooth-papilla? ; mouth-papilla? arranged in a clump on 

 the side of the mouth-frame, and above its lower edge. Two genital slits, 

 nearly as long as the disk is high. 



This genus belongs to the Astrophytidte, as the insertion of the arms in 

 the disk, the character of the skin covering, and presence of radial ribs 

 show ; but in its chewing apparatus it presents more the characters of the 

 Ophiuridae. It stands near Astroschema, which, however, has no teeth. 



Ophiocreas lumbrieus Lyman, sp. nov. 



Special Marls. — Radial ribs running quite to the centre of the disk. 

 Two arm-spines, the lower longer. Arms gradually tapering, and nearly 

 twenty times as long as the diameter of the disk. Skin beset with scattered 

 microscopic thorny grains. 



Description of a Specimen. — Diameter of disk 12 mm. Length of arm 

 230 mm. Height of arm near base 3 mm. ; width of arm 2.5 mm. 

 Mouth-papilla? nine or ten, forming a close, irregular clump of rounded 

 grains on the side of the mouth-frame ; none of them are as low as the 

 under surface of the mouth, and are scarcely to be seen without forcing 



* o<£i9, snake; /cpe'as, flesh. 



