MAC'RURA. SCHMITT. 355 



legs, they approach the species designated as T. ansper by 

 Alcock; the thelycum, however, fits into the series of T. 

 curvirostris before me, while the petasma of the single 

 male specimen is like that figured by Bate for anchoralis 

 and referred to by de Man under the same name. The 

 fifth legs of the "Endeavour'' specimens vary from one- 

 third the length of the dactylus short of the tip of the 

 antennal scale in the largest, to exceeding the scale by 

 not quite one-third of the length of the dactylus in the 

 smallest specimen of 87 mm. length. 



The count of the rostral teeth in the lone male and 

 the one female with a complete rostrum, totals seven, 

 exclusive of the epigastric tooth, being thus coincident 

 in number with the count, which was found to be remark- 

 ably constant for a series of more than thirty Japanese 

 specimens of T. curvirostris in the collections of the U.S. 

 National Museum. Among these there were but four 

 deviations; other than the epigastric, one had eight teeth, 

 one six teeth, another five, with, however, a blunt hump 

 indicative of a possible former sixth tooth; and the 

 fourth specimen with but three teeth, all confined to the 

 basal half of the free portion of the rostrum and clearly 

 an abnormality, possibly the result of regeneration, 

 though not apparent as such on examination. 



With respect to the rostral count and the length of 

 the fifth pair of legs, de Man's specimens of T. anchoralis 

 also approach Alcock's T, aspcr, but here again the 

 thelycum stands within a curvirostris series, as does also 

 the somewhat variable character and development of the 

 post-rostral carina of his specimens. The rostrum of 

 T. asper is dorsally armed with nine or ten teeth, not 

 including the isolated epigastric tooth. In de Man's 7\ 

 anchoralis, so-called, the rostral count of the three speci- 

 mens for which it is given, not including the epigastric, 

 is eight, nine and ten. Bate's a-n choral is males, which 

 surely are true T. currirostris, had from six to eight 

 rostral teeth in addition to the epigastric. 



De Man's statement that his anchoralis differs from 

 T. curvirostris by virtue of the non-projection of the 

 submedian teeth of the petasma beyond the lateral lobes, 

 is a distinction of very doubtful value. Even Kishiuouye's 

 three views of the same petasma are not wholly in agree- 

 ment with regard to the relative length, or projection, 

 of the submediau teeth beyond a line connecting the 



