130 T. GiSLEN. 



P, 8—9; 3 mm. (3" and 4"' segment the longest, L = 2 br, all 

 the segments smooth), P2 11: 4 mm. similar to Pj, but coarser, P., 10; 

 3,3 mm. P4 9; 2,2 mm. with a genital gland from the 4"' to the 0"^ 

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

 nules increasing agahi. 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 br, a little swollen at the joints). 



Disk dark brown, otherwise the animal is light brown (in s]iii-it). 



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



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

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

 P3 8; 2 mm. P^ 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. Clark, whom I have consulted about this question, writes: 

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

 the genus Argi/rometra. now known from Hawaii and from New Zea- 

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

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

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

 mortenseni from New Zealand and A. (»Compsometra») crispa from Ha- 

 waii. Smaller species of this genus may well have a more or less 

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

 well marked character both of Toxometra and Doromet7ri». 



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

 feri'ed to Argyrometra. 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 nun. 

 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, tiiially. the Br-structures does not 

 resemble that of Antedon petasm 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 i-esemb- 

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



