98 



double those in the inner row" it must be a lapsus calami; the inverted order 

 prevails. 



While M. Whitmœi thus certainly must be withdrawn as a synonym only of 

 M. globulus, some specimens in the British Museum from Macclesfield Bank, named 

 M. globulus, will perhajis prove to be another species. They present the curious 

 feature of the calcareous substance in the pedicellariæ being of a beautiful red 

 colour (especially the ophicephalous ones); but otherwise the pedicellariæ do not 

 present differences from those of M. globulus. Only the naked interambulacral 

 spaces are dark, the rest of the test is beautifully red coloured; the spines are 

 distinctly red ringed. — Possibly they belong to M. levituberculata Yosliiwara '), for 

 which species it is pointed out that the pedicellariæ are brown; however they do 

 not accord very well with the (insufficient) description of that species, so that 

 I shall not try to decide whether they really belong to it having seen no authentic 

 specimen of M. levituberculata. Yoshiwara points out as the most important cha- 

 racter of M. levituberculata that its primary and secondary tubercles are very small, 

 not perforated or crenulated „thus difl'ering from any other species of Mespilia"". 

 It need scarcely be remarked that no Temnopleurid at all, nor, indeed, any Echinid 

 of the Tribus Echinina has perforate tubercles; and crcnulate tubercles do not occur 

 in the only other known species of Mespilia, M. globulus. 



Microcyphus inaculalus Agass. The globiferous pedicellariæ (PI. VI. Fig. 19. 

 PI. VII. Fig. 20) are rather large and have no lateral teeth; the outer corners of the 

 basal part are rounded, and may be a little produced. The valves of the ophice- 

 phalous pedicellariæ (PI. VII. Fig. 31) are narrowed in the middle; the triphyllous 

 pedicellariæ are very similar to those of Salmacopsis oliuacea (PI. VII. Fig. 23), but 

 the edge is quite smooth. Tridentate pedicellariæ I have not found. The spicules 

 of the tubefeet (bihamate) are very few in number. The buccal membrane has 

 a ring of small plates in the oral edge, otherwise it is naked, with a few bihamate 

 spicules. Ophicephalous and triphyllous pedicellariæ may occur on the buccal 

 plates. The spines, primary and secondary, end in a large central thorn without 

 small thorns at its base (PI. II. Figs. 23, 28). 



It may well be regarded as doubtful, whether M. Rousseaui Agass. (the form 

 figured in „Rev. of Ech." PI. VIII. a. Fig. 8) is really synonymous with M.maculatus, 

 as maintained by Agassiz. In any case the spines and pedicellariæ of this form 

 must be examined, before we can say with certainty, if they be identical or not. 

 (The type-specimen is a naked test.) A priori it seems not very probable that such 

 changes as seen by comparing the figures 8 and 9 in PI. VIII. a. of „Rev. of Ech." 

 do reallj' occur in the same species. Also the type of Anthechinus roseus A. Ag. 

 might well deserve a renewed examination. The perfectly smooth genital plates, 

 the spines on the anal plates and the „exceedingly slender" spines do not agree 

 very well with M. maculatus to which species Agassiz refers it as a synonym. 



') Prelimiiiarv notice iif new .lapanese lithinoids. Aiiiiot. Ziml. .lapon. II. 1898. p. 58. 



