3l6 ECHINODJ^RMA OP THE INDIAN MUSEUM, TART VII. 



P(j is 3-5 mm. long with nine or ten segments ; it is small and weak, rounded, 

 prismatic, and tapers evenly from the base to the tip; the segments, at first 

 short, become about as long as broad on the third and twice as long as broad, or 

 even longer, terminally. P, is 4-5 mm. long with nine or ten segments, resem- 

 bling Pc but proportionately larger and stouter. P„ is 7 mm. long, much larger 

 and stouter than the preceding or succeeding pinnules, with ten segments of 

 which the first is slightly over twice as broad as long, the second is about half 

 again as broad as long, and the third is half again as long as broad; the follow- 

 ing gradually increase in length and become about three times as long as broad 

 distally ; the pinnule is much more slender than the corresponding pinnule in the 

 other species of the genus ; the second and following segments have rather strongly 

 produced distal edges which are armed with fine spines. Pj is similar but slightly 

 longer and larger ; P,, is 5 mm. long, slender, with twelve segments, in general 

 resembling the preceding pinnules; P,. is 3 mm. long with nine or ten segments, 

 which after the third become much elongated, small and weak. The distal 

 pinnules are very slender, 6 mm. long. 



The colour in spirits is a uniform dark puri)Ie, tiie cirri beyond the transition 

 segment being nearly white. 



Locality. — Southwest of the )nouths of the Iiraivaddij River : " Investigator" 

 Station 387 (15° 25' N. lat., 93° 45' E. long.) ; 49-40 faf.homs.~Two specimens. 



Remarks. — A second specimen from the type locality has the cirri XllI, 

 10-18 (usually 18), 10 mm. to 12 mm. long; the si.xth is a transition .segment ; P^; 

 is 4 mm. long with ten segments ; P^ is 9 mm. long with eleven segments ; Pj is 6-5 

 ram. long with fourteen segments. 



The slenderness and proportionate great length of P„ and P,, which have very 

 long segments distally, distinguishes this species from all the previously described 

 species of the genus. 



AMPHIMETRA PHILIBERTI. 



Locality. — Andaman, Islands. — One small specimen. 



AMPHIMETRA MULLERl. 



Locality. — Ye, Burma. — Two specimens. 



Remarks. — These are typical specimens, and resemble the type (in the 

 Copenhagen Museum), wliich was collected in the ■' East Indies." The synar- 

 thrial tubercles are small, but very prominent. The arms are 100 mm. long. 



CRASPEDOMETRA ANCEPS. 



Locality. — Andaman. Islands. —One immature speeinien witli fourteen arms 

 about 10(1 mm. long. 



