38 



ART. 2. — H. MATSUMOTO ! 



Colnett Strait ; 83-84 fathoms (Clark). 



Bay of Bengal. Ceylon. Malaysian waters. Hong-kong. 



Trichaster elegans Ludwig. 



Tricliaster elegans : Ludwig, Zeitschr. wiss. Zool., XXXI, 1878, j^p. 

 59-67, PL Y, figs. 1-9 ; Lyman, Eep. Challenger, V, 1882, p. 267 ; Bomford, 

 Rec. Ind. Mus., IX, Pfc. 4, 1913, p. 220, PI. XHI, figs. 3 & 4. 



Two specimens ; Tanabé Bay, Kii. 



Pacific Ocean (Ludwig). India (Bomfoed). 



DöDERLEiN thinks that the present species is a young form of T. 

 jKilmiferus ; but like Bomford I can not agree with this opinion. My 

 two specimens are quite large, and are of course adult and sexually 

 mature. The large arm tubercles, which are characteristic of T. 



Fig. 8. TriclwLster elegans. xl. a. From above, h. Ventral view of skeleton of two arm 

 joints, c. Frontal view of skeleton of an arm joint, d. Lateral view of skeleton of two arm 

 joints. 



EX. External row of nodules, ind. Internal distal row of nodules, inp. Internal proximal 

 row of nodules, lp. Lateral arm plate, vp. Ventral arm plate. 



