274 bulletin: museum of comparative zoology. 



Ophiophragmus filograneus. 



Plate 2, fig. 4, 5. 



Ophiocnida filogranea Lyman, 1875. lUus. cat. M. C. Z., no. 8, pt. 2, p. 20, 

 fig. 88, 89. 



This species is surprisingly similar to typical 0. wurdemanii in all 

 essential features save the covering of the interbrachial areas below, 

 a resemblance, which curiously enough, Mr. Lyman seems to have 

 entirely, overlooked. The lower interbrachial areas are, as usual, 

 covered by a coat of numerous, thick, overlapping scales, but, except 

 along the margins of the genital slits and near the oral shields, the 

 scales are concealed beneath a dense covering of granules; towards 

 the mouth, these granules are nearly spherical but they become more 

 elongated distally and just below the marginal papillae, where they 

 are like those papillae in form but much smaller, they are cylindrical 

 and about three times as long as thick. All of the M. C. Z. specimens 

 agree in the possession of the granules, which are totally wanting in 

 all available specimens of 0. wurdemanii. The smallest 0. filograneus 

 before me has the disk only 3 mm. across but the marginal papillae 

 are well-developed and the granules distinctly evident. The arms 

 of this specimen exceed 50 mm. in length or more than 17 times the 

 disk-diameter. The species is known only from Cedar Keys, and 

 Port Tampa, Florida. At the latter place, Mr. George M. Gray 

 collected many specimens in the winter of 1915; he found them 

 burrowing in the mud. 



Ophiophragmus pulcher, sp. nov. 

 pulcher = beautiful, in reference to the notable coloration. 



Plate 8, fig. 1. 



Holohjpe.— M. C. Z. 4,210, and four Paratypes, M. C. Z. 4,215. 

 Florida: Dry Tortugas, near Loggerhead Key, June, 1917, in 5-7 

 fms. and on Bird Key reef-flat in mud, in 2-3 ft. of water. Carnegie 

 Expedition. H. L. Clark coll. 



Disk 7.5 mm. in diameter; arms 75-80 mm. long. Disk covered by a 

 coat of moderately coarse scales, about 9 or 10 series at the narrowest 

 part of the interradial area; along the disk-margin in each interradial 

 space, are 5-8 conspicuous erect papillae similar to those in 0. septus 

 and 0. wurdemanii. Radial shields moderate, each about 1.5 mm. 



