. EEPORT ON THE OPHIUEOIDEA. 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 

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

 be soldered to the plate {Oijhioleins elegans). The peristomial plate may either be thin 

 and in one piece {Ophiolepis elegans), or thick and divided in two {Opluolepis 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 Opliioglypha, Pectinura, 

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



Table of Species of Opliiolepis. 



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



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



4 minute arm spines. The heltings of smaller disk scales, uniform 1 ^ , • , ■, ■ f 

 ahove and below, . . . . . • J 



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



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, MiiU & 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., 111. Cat. Mus. Comp. Zool., No. i. p. 61, pi. ii. fig. 4, 1865. 



Station 186, Samboangan, Philippine Islands; 8 fathoms. 



Op>hiolei-)is 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 Lmk), Actinol., p. 244, tab. xxiv., 1834. 

 Station 18 6.— September 8, 1874; Ternate Shore near Celebes ; 8 fathoms; coral sand. 



Species of Opliiolepis not herein described. 



Ophiolepis paucispina, Miill. & 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. PhO. Acad., vol. v. p. 149, pi. i., 1825. 



West Indies ; 3 to 4 fathoms. 



