130 T. GisLÉN, 



Pi 8—9; ;} mil). (;{'' and 4''' segment the longest, L = 2 bi'. ail 

 the segments smooth), P, 11; 4 mm. similai' to P, . but coarser, P-i 10; 

 3,3 mm. P4 9; 2,2 mm. with a genital gland from the 4"' to the O"' 

 segment, much more slender than the preceding ones. Then the pin- 

 nules increasing again. P., 8; 2,3 mm, P,, 8; P,. 8 about as long as P,,. 

 The distal p. 16 — 17; 6,5 — 7 mm (the 3 first pinnulars rather short, the 

 other ones L = 3 — 4 X l)r, a little swollen at the joints). 



Disk dark brown, otherwise the animal is light brown (in spii-it). 



Sp. 2 (St. 4) C. XIV 10-11; 4-5 mm. 



I Br 1 h = '/4br, with a dorsal tubercle (not a crista) together 

 with the axillary. Arms X, 40 mm. Pj 8; 2,2 nnn. P, 9 — 10; 2,7 mm. 

 P3 8; 2 mm. Pg 6; 2 mm. Distal p. 5 mm. 



The specimen sticking to a calcareous sponge. 



The placing of this species has caused some trouble, 



A. H. Claek, whom I have consulted about this question, writes: 

 »Your new antedonid from Japan may very well be a new species of 

 the genus Ärgyrometra, now known from Hawaii and from New Zea- 

 land. The oecui-rence of this genus in southern Japan is highly prob- 

 able. This genus belongs to that section of the Antedoninse in which 

 P3 is similar to the succeeding pinnules. There are two species A. 

 mortenseni fi-om New Zealand and A. (»Gompsometra») crispa from Ha- 

 w^aii. Smaller species of this genus may well have a more or less 

 discoidal centrodorsal. The large size of P3 seems to be an especially 

 well marked character both of Toxometra and Borometra». 



I cannot believe that the species in question ought to be re- 

 ferred to Ärgyrometra. Cd in this genus is conical already at an arm- 

 length of 30 mm. and my species, which has an almost discoidal Cd, 

 is not a smaller species of this genus but has an arm-length of 65 nnn. 

 The number of cirri does not amount to XXX; it might have been 

 larger if the species had been a large form of Argyrometra, where 

 even small species with an armlength of 30 mm, have a number of 

 LX — LXXX. P3 has not the same character as the following pinnules, 

 which are genital pinnules and, finally, the Br-structures does not 

 resemble that of Antedon petasus but much more that of Toxometra. 



The above-described species differs from Toxometra by the 3 

 first pinnules, which are of about equal length, and in this it resemb- 

 les Andrometra psyche (and Iridometra). The genus Andrometra, how- 



