REPORT ON THE OPHIUROIDEA. 11 



Ophiura squamosissima, Lym., 111. Cat. Mus. Comp. Zool., No. i. p. 10, 18G5. 



Ophiodenna squamosissima, Ltk., Vid. Meddel., Jan. 185G, p. 8; Addit. ad Hist., part 2, p. 92, 

 pi. i. fig. 7, 1859. 



West Indies. 



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

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



West Coast of Central America ; Lower California. 



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



Ophiodenna Elaps, Ltk., Vid. Meddel., Jan. 1856, p. 19; Addit. ad Hist., part 2, p. 93, 1S59. 

 Ophiura elaps, Lym., 111. Cat. Mus. Comp. Zool., No. i. p. 10, 1865. 



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



Ophiopeza. 

 Opjhiopeza, Pet., Monatsb. Konig. Akad., Berlin, 1851. 



Disk granulated. Teeth, and numerous even, close-set mouth papilla? ; 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 PI. XLI. figs. 1-3.) 



Table of Species of Ophiopeza. 



, , i 18 disk grains in the length of 1 mm. 5-6 arm spines, . Ophiopeza p' t> rsi. 



8 



5 



i 



Radial shields 

 granulated. 



13 disk grains in the length of 1 mm. •! f\ C( l ua ,lrm i Ophiopeza yoldii 



( 6 arm spines. Mouth -i 

 25 disk grains in the length of 1 mm. < j ,° , n 1 " \- < Jph' l ie ~- - aster. 



I tentacle scale, . J 



g r/ ( ( 25 disk grains in the length of 1 mm. . 8 arm spines, . Ophiopeza fallax. 



Radial shields J 

 granulated, j n ^ ^^ ju the lcngth rf , mm j lO^jmes^equal, J 0pMop(Zil „ (// , a//v 



©.a 



