REPORT ON THE OPHIUROIDEA. 19 



except the strong genital plates, which have a long, thick head, to which is attached the 

 genital scale, at a point far inward, so that the genital opening is much shortened 

 (Ophiolepis cincta), or, what amounts to the same, the scale may, for a part of its length, 

 be soldered to the plate (Op>hiolepis elegans). The peristomial plate may either be thin 

 and in one piece (Ophiolepis elegans), or thick and divided in two (Ophiolepis cincta). 

 On the edge of the wings of the arm bones are grooves. The first mouth tentacle is 

 enclosed in a tube of lime scales, a feature observed also in Ophioglxjpha, Pectinura, 

 Ophiura, &c. (See PL XXXVII. figs. 7-9.) 



Table of Species of Ophiolepis. 



1 scale-like arm spine. Mouth papillae in two rows, one above the other, Ophiolepis carinata. 



2 very short arm spines, ...... Ophiolepis paucispina. 



4 minute arm spines. The beltings of smaller disk scales, uniform ) _ , . , . 



, , , , > Ophiolepis cincta. 



above and below, . . . . . . ) 



4-5 arm spines. Disk plates forming a nearly smooth surface, . Ophiolepis variegata. 



5-6 arm spines, otherwise similar to preceding, . . . Ophiolepis elegans. 



6-7 arm spines. Disk plates forming a rough broken surface, . Ophiolepis annulosa. 



Ophiolepis cincta, Mull. & Tr. (PI. XXXVII. figs. 7-9). 



Ophiolepis cincta, Mull & Tr., Syst. Ast., p. 90, 1842; Ltk., Addit. ad Hist., part 2, p. 101, 



pi. ii. fig. 6 ; Lym., 111. Cat. Mus. Comp. Zool., No. i. p. 60. 

 Ophiolepis Garretti, Lym., HI. Cat. Mus. Comp. Zool., No. i. p. 61, pi. ii. fig. 4, 1865. 



Station 186, Samboangan, Philippine Islands; 8 fathoms. 



Op>hioIepis annulosa, Mull. & Tr., Wieg. Arch., vol. vi. p. 328, 1840; Syst. Ast, p. 89, 

 1842; Ltk., Addit. ad Hist., part 2, p. 100, pi. ii. fig. 5; Lym., 111. Cat, Mus. Comp. 

 Zool., No. i. p. 58. 



Ophiura annulosa, Blainv. (non Lnik.), Actinol., p. 244, tab. xxiv., 1834. 



Station 186. — September 8, 1874; Ternate Shore near Celebes ; 8 fathoms ; coral sand. 



Species of Ophiolejyis not herein described. 



Ophiolepis paucispina, Mull. & Tr., Syst. Ast., p. 90, 1842; Lym., 111. Cat. Mus. Comp. 

 Zool., No. i. p. 55 ; Ltk., Addit. ad Hist, part 2, p. 102, pi. ii. fig. 2. 

 Ophiura paucispina, Say, Journ. Phil. Acad., vol. v. p. 149, pi. i, 1825. 

 West Indies ; 3 to 4 fathoms. 



