197 



Color, in alcohol : above, disc nearly white ; arms straw-color, 

 with irregular bands of dark brown ; below, arms straw-color, 

 interbrachial spaces white, mouth-shields brown. 



This species belongs with those Amphiurce that have the upper 

 row of the lower scales of the disc strongly developed and stand- 

 ing upright, thus making a sort of fence. It differs from A. septa, 

 in the shape of the mouth-shields, and in wanting spines on the 

 upper surface of the disc ; from A. marginata, in the irregular 

 arrangement of the disc-scales, the different proportions of the 

 arm-plates, &c. 



Locality, Captiva Key, Charlotte's Harbor, Florida. Mr. 

 Wurdeman. 



Museum of Comparative Zoology, Cambridge. 



Ophioglypha, (Lyman.) 



"Odig. ylv(pTj (notch). 



Synonyme : Ophiura, (Forbes, non Lamk.) 



The genus Ophiura, as defined by Forbes and as used by Dr. 

 Liitken, cannot stand. Dr. Liitken himself points out the fact, 

 that Lamarck, in his first edition of " Systeme des Animaux sans 

 Yertebres," (1801,) took, as the type of his genus Ophiura, Aste- 

 rias loiigicauda, (Linck.) which is Ophioderma longicauda, (Miill. 

 & Trosch.) Ophiura, then, is the proper generic name for Ophi- 

 oderma, and Ophioderma must be dropped. It becomes therefore 

 necessary to give a new name to the genus called Ophiura by 

 Forbes, and I propose that of Ophioglypha. 



Ophioglypha Lutkenii, (Lyman,) sp. nov. 



Description of a Specimen. Diameter of the disc, 18 millim. 

 Outer edge of mouth-shield to outer corner of opposite mouth- 

 slit, 8.5 millim. Width of arm, without spines, 3.5 millim. 

 Length of arm, 90 milHm. Mouth-papillse like thorns ; a bunch 

 of about ten at the point of the jaw, and two or three scattered 

 ones, on each side, placed above the scales of innermost pair of 

 tentacle-pores. Teeth about 9 ; long, narrow, flat, rather sharp, 

 arranged sometimes in single, sometimes in double rows. Mouth- 

 shields shield-shaped, with an angle turned inward, and outer side 

 rounded ; lateral corners somewhat projecting ; length to breadth, 

 3 : 3. Under arm-plates, at base of arm, broad, triangular, with 



