EEPORT ON THE OPHIUROIDEA. 11 



Opliiura squamosissima, Lym., 111. Cat. Mus. Comp. Zool., No. i. p. 10, 1865. 



Ophioderma squamosissima, Ltk., Vid. Meddel., Jan. 1856, p. 8j AdJit. ad Hist., part 2, p. 92, 

 pi. i. fig. 7, 1859. 



West Indies. 



Ophiura teres, Lym., Proe. Bost. Soc. N. H., vol. vii. pp. 198 and 257, 1860; 111. 

 Cat. Mus. Comp. Zool., No. i. p. 37, fig. 1 ; Yl\., Trans. Conn. Acad., vol. i., part 2, p. 253. 



West Coast of Central America ; Lower California. 



OjjMura elaps, Lym. (PI. XXXVII. figs. 1-3, PI. XLVI. fig. 3). 



Ophioderma Elaps, Ltk., Vid. Jleddel., Jan. 1856, p. 19; Addit. ad Hist, part 2, p. 93, 1859. 

 Opliiura elaps, Lym., lU. Cat. Mus. Comp. Zool., No. i. p. 10, 1865. 



West Indies ; 120 fathoms. (Same species ?.) 



Ophiopeza. 

 Ophiopeza, Pet, Monatsb. Konig. Akad., EerUn, 1851. 



Disk granulated. Teeth, and numerous even, close-set mouth papilla3 ; no tooth 

 papillae. Spines smooth, shorter than the arm joints, flattened, numerous (5-10). 

 Tentacle scales one or two ; in the latter case the upper one covers the base of the 

 lowest arm spine. An indentation in the back of the disk, at the base of each arm. 

 Two genital openings in each interbrachial space. 



In its general features, the skeleton is similar to that of Ophiura. The genital 

 plates, however, are shorter and thicker, and the genital scale is attached at a point 

 considerably inside the head, thus shortening the genital opening. On the inner 

 face of an arm bone the umbo and articulating knobs are larger and more rounded. 

 (See PL XLI. figs. 1-3.) 



Table of Species of Ophiopeza. 



itatia s e e t- i ^^ ^j^j, grains in tlie length of 1 mm. 5-6 arm spines, . Ophiopeza pdefsi. 



1 3 disk grains in the length of 1 mm. ^ . • i ^i'^'^<^<* ijoldiL 



'E. 



^ 



to 

 I 



Radial shields 

 "rauidated. 



C 6 arm spines. Mouth ■\ 

 25 disk grains in the length of 1 mm. < j ° , O 1 ^ o e Vi^pMopeza aster. 



I . tentacle scale, . J 



2 . r f 25 disk grains in the length of 1 mm. . 8 arm spines, . Ophiojjeza fallajr. 



e a J Radial shields J 



fH S''°"'^'''- 1 13 disk grains in the length of 1 mm. { ' ^..^TptTh"^ wit,'': J ^'^'"'^^^"' '"^"'''' 



