58 



OPHIOLEPIS ELEGANS. 



Opliiolepis annulosa mill. & Trosch. 



Ophiura annulosa De Blaixv. {non Lanik.). Man. d'Actin., p. 244. 

 Ophiolepis annulosa Mull. & Troscii. Syst. Asterid., p. 89. 1842. 

 Opliiolepis annulosa Lltkex. Addit. ad Hist. Opli., II. pi. II. fig. 5. 



LIST OF SPECIMENS. 



1834. 



Ophiolepis elegans Lutken. (Plate II. Fig. 5.) 



Opliiolepis elegans Lutkex. Addit. ad Ilist. Oph., p. 105. 



Special Maries. — Arms rather less than three tmies the diameter of 

 the disk. Primary plates very flat and regular ; a rosette of six in the 

 centre of the disk ; a single row of three in each interbrachial space, 

 and one primary plate in each brachial space. 



Description of a Specirnen. — Diameter of disk, 17™"^'; from outer 

 side of mouth-shield to outer corner of opposite mouth-slit, 6°"°- ; width 

 of ann without spines, 4.2™"- ; length of arm, 48™°" ; distance from outer 

 side of mouth-shield to inner points of mouth-papilla?, to that between 

 outer corners of mouth-slits, 3.6 : 2.9. Mouth-papilljB eleven, close set 

 in an even row ; outermost one tapering and sharp, slightly overlapping 

 the next one, which is the broadest of all, being about twice as broad 

 as long ; the rest squarish, with bevelled, cutting edges ; innermost one 

 pointing to centre of mouth. Teeth four, regularly decreasing in width 

 from below upwards ; three lowest ones broad and flat, with a neatly 

 curved cutting edge ; uppermost one narrower and more pointed. 

 Mouth-shields much longer than broad, with their outer side curved, 

 lateral sides straight, and inner laterals short, a little re-enteringly 

 curved, and meeting in an angle on the middle line ; length to breadth, 

 2 : 1. Side mouth-shields as broad as mouth-shields, hardly curved, 

 having Avithout a point which runs to the inner end of the genital slit. 

 Under arm-plates broader than long, a trifle narrower within than with- 

 out, squarish, with rounded corners, outer and inner sides nearly straight, 

 lateral sides a little re-enteringly curved ; length to breadth (seventh 

 plate), 1 : 1.6 ; towards the end of the arm, the plates are broader with- 



