330 bulletin: museum of compaeative zoology. 



Ophiopsila riisei. 

 Lutken, 1859. Add. ad hist, oph., pt. 2, p. 136. 



This is a common West Indian brittle-star, occurring in crevices 

 and holes in rocks and in similar shelters in shallow water. It has 

 been recorded from as far north as Bermuda and as far south as Brazil, 

 but these records need ^'erification. At the Tortugas, 0. riisei is 

 common and Mr. Lyman says it is very common at Cape Florida. 

 I have not met with it in Jamaica, nor at Tobago. 



Ophiopsila maculata. 



Amphipsila maculata Verrill, 1899. Bull. Univ. Iowa, new ser., 1, no. 6, p. 55. 

 Ophiopsila maculata Meissner, 1901. Bronn'.s thierreichs, 2, abt. 3, p. 932. 



The type of this species was taken by the University of Iowa 

 Bahamas Expedition off Havana, Cuba, in 200 fms., and in recent 

 years, Koehler has recorded it twice. In 1908, he reports a small 

 specimen in 36 fms. off the coast of Espiritu Santo, Brazil, and in 1914, 

 one from southeast of Jamaica in 23 fms. and another from the vicinity 

 of Havana, Cuba, in 201 fms. Both the geographical and bathy- 

 metrical ranges are thus rather extensive. Verrill regarded this 

 species as one of the Ophiacanthidae but the tentacle-scales seem to 

 make its reference to Ophiopsila imperative. 



Ophiopsila vittata, sp. nov. 



vitlatus = banded, in reference to the coloration of the arms. 



Holotype — M. C. Z., 4,227 and 2 Paratypes, M. C. Z. 4,228. 

 Florida: Dry Tortugas, southeast of Loggerhead Key, June, 1917, 

 6-8 fms. Carnegie Expedition. H. L. Clark coll. 



Plate 8, fig. 2. 



Disk, 7 mm. in diameter; arms 75-80 mm. long. Disk covered 

 by a smooth skin which, even when dry, shows no scales, although 

 under a magnification of seventy diameters it appears quite rough. 

 Radial shields long, narrow, and conspicuous; they are now in contact 

 distally and diverge slightly proximally, but in life they are probably 

 nearly parallel and quite separate. L^pper arm-plates at base of arm 



