CLARK: JAPANESE AND EAST INDIAN ECHINODERMS. 311 



crowded colored patches on the skin half a millimeter or less in diameter. Al- 

 though the color of these phosphatic bodies, when seen under the microscope, is 

 yellowish brown with little trace of red, the color of the animal to the unaided 

 eye is decidedly reddish. — Oral disc and caudal appendage very light gray; all 

 other parts densely speckled, especially anteriorly, with minute patches of light 

 dragon's-blood red (Ridgway's Nomenclature of Color) ; general effect, therefore, 

 is light old-rose red. 



1 specimen, Yenoshima, Sagami Bay, Japan. Depth unknown. Owston 

 collection. 



It is with no little hesitation that I add another to the already long list of 

 Molpadias described from a single specimen, but I cannot assign this Japanese 

 novelty to any species hitherto described. It is most nearly related to M. interme- 

 dia of the North Pacific, but is easily distinguished from that species by the 

 absence of tables, the minute phosphatic bodies, and the color. The " Key to 

 the Species of Molpadia," recently published (Smiths. Cont. Knowl., 35, p. 158), 

 will have to be modified as follows to include rosacea. 



A. Anchors wanting, etc. 

 B. Phosphatic deposits present, etc. 

 C. No true supporting rods, etc. 

 D. Tables of body often very irregular, distorted or incomplete, sometimes 

 wholly wanting; disc seldom with more than eight holes (those in tail 

 may have 20-30 holes). 

 E. Tables with more or less distinct disc, having 2-8 or more (usually 

 3-6), holes often with irregular outline and marginal projections ; 

 sometimes with no spire, and thus reduced to small irregular plates 

 with 2-8 perforations. 

 F. Tables or plates of moderate size, 80-350/* in diameter, usually with 

 only one spire. 

 G. Tables often wanting in skin of body, present in tail; disc quite 

 asymmetrical ; spire of moderate height, etc. 



GG. Tables (or perforated disc-like plates) present in skin of body; 

 disc rather symmetrical with 3-6 or more holes; spire (when 

 present) high. 

 H. Phosphatic deposits more than 60/i in diameter; tables with 

 spires; color not old-rose red. 



Discs, etc intermedia. 



Discs, etc andamanensis. 



HH. Phosphatic deposits very minute, 40ytt or less in diameter ; 

 tables reduced to perforated disc-like plates ; color old-rose 



red rosacea. 



FF. Tables, etc similis. 



