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THE OnilURID^ 



125 



15. Ophioglypha scutellata n. sp, 



Plate II. Figs. 4-6. 



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Diameter of disk, 9 mm.; width of arm close to disk, 1.5 mm. : length of 

 arms unknown. Three to four mouth papillae on each side ; the two (three) 

 outer ones are short, square, and close set, the innermost one and that on 

 the apex of jaw pointed. Mouth shield almost hourglass-shaped^ with an 

 angle within and outer edge curved, the lateral sides deeply constricted; 

 longer than broad. Side mouth shields long and narrow, a little narrower 

 without than within, where they meet. 



Ventral plates broader than long, all widely separated. First ventral 

 plate rhomboidal, smaller than those beyond ; second with inner edge curved, 

 outer edge a little concave ; the rest have a short peak within and a median 

 cut in the outer edge ; they become gradually shorter, almost rectangular, 

 the short sides of the rectangle made by the outer laterals, the inner laterals 



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standing almost at a right angle to the longitudinal axis of the arm, re-enter- 

 ingly curved. The first two ventral plates are separated by a small rec- 

 tangular plate, which also separates the side arm-plates of the first joint 

 (this plate is not developed on all the arms, but there is then a rectangular 

 naked space on the same place). Between the second and third ventral 

 plate there is a triangular or rectangular naked space, which separates the 

 side arm-plates of the second joint. Also at the inner end of the fourth 

 ventral plate there may be a httle naked space. Under side of the arm 

 (inner part) somewhat hollowed. Side arm-plates meeting below from the 

 third arm-joint, above from the fourth or fifth; their outer edge rather 



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prominent. Dorsal plates all with outer edge rounded and lateral sides a 

 little re-enteringly curved. The first is rudimentary, enclosed in the very 

 small incisure of the disk; second to fourth have inner end truncated, from 



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the fourth they are triangular with an acute angle within. Third and 

 fourth are much longer than broad, and by a transverse line divided in two 

 pieces, of which the inner is rectangular, the outer of the same shape as the 

 second dorsal plate. 



Disk covered with rather delicate overlapping scales, among which the 

 primary plates are not very conspicuous. Radial shields not very lar<'*e, 

 meeting broadly without, separated within by some few scales. Inter- 

 brachial space with a rather large, semilunar marginal plate (not distinct 



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