MACRURA. SCHMITT. 357 



usual for other and larger specimens of the species from 

 that region, reaching nearly to the tip of the spine of 

 the antenna! scale. The rostral count of these specimens 

 is typical, and the post-rostral carina can be traced to 

 near the posterior margin of the carapace. 



Of the species here grouped together as T. curvi- 

 rostris, the comparative length of the antennular flagella 

 likewise seems to be too variable to have any value as a 

 diagnostic character. The antennular flagella of de 

 Man's anchoralis range in length from three-fourths the 

 length of their peduncle in the largest female, of 64 mm., 

 to "but little shorter than it" in two other much younger 

 specimens. Of his two curvirostris females from the 

 Inland Sea of Japan, the autennular flagella are "only 

 one-third shorter than their peduncle," which is just 

 about the length given by Alcock in describing the female 

 of T. aspcr "the antennular flagella [are] . . . about 

 two-thirds the length of their peduncle." The length of 

 the antennular flagella of about twelve females of the 

 U.S. National Museum series of T. curvirostris from 

 Japan, varies from four-fifths, and nine-tenths, to nearly 

 as long as the peduncle. In the larger of the two females 

 taken by the "Endeavour" the antennular flagella are 

 ten-elevenths the length of the peduncle and in the 

 smaller of 47 mm. they are just about as long as the 

 peduncle. The single 37 mm. male has the flagella one- 

 sixteenth longer than the peduncle. 



The telson of these three "Endeavour" specimens is 

 spined as in curvirostris, the spining of which has been 

 set forth in detail by de Man. The several spines, how- 

 ever, are relatively somewhat longer and more slender 

 than is usual with most representatives of T. curvirostris, 

 a possible indication of youth or immaturity, except the 

 third, or pair immediately adjacent to the fourth or sub- 

 terminal pair of spinules. This third pair of spinules is 

 very small, inconspicuous and hard to see, but when quite 

 dry plainly shows on the right side of the detached telson 

 of the smaller female. On the left side the former pre- 

 sence of the corresponding spine is indicated by a tiny 

 pit or punctation. In the other two specimens the evi- 

 dence is less conclusive. The larger female has a similar 

 pit discernible on the left side of the telson close upon 

 the base of the subterminal spine; on the right side both 

 the third and fourth spines are wanting. The position 



