1888.] FROM TUTICORIN, MADRAS. 387 



Prof. Alex. Agassiz based his description. I give the more impor- 

 tant measurements of the larger of the two specimens, from which 

 it will be seen that the proportions are very similar to those of the 

 type :— 



millim. 



Longest diameter 38*o 



Greatest breadth 33 



Height 21 



Distance of apical system from anterior edge .... 21 



Length of anterior petals 15 



Length of posterior petals 16 



Width of interporiferous space 4 



Width of actinostome 9'5 



Haplodactyla atjstralis. 



I think that Prof. Ludwig (SB. .\k. Berl. 1887, p. 1218) is right 

 in regarding //. andamanensis. Bell, as a synonym of Semper's 

 species ; but I may point out that the figure of the spicules given 

 by Selenka differs somewhat from the representation drawn by Prof. 

 Ludwig ; the resemblance between the latter and my figures of the 

 spicules of H. andamanensis is ver}' close. 



HOLOTHURIA VAGABUNDA. 



With regard to this species I have to observe that, noting in one 

 the great muscularity of the walls of the cloaca, I concluded it must 

 have extensible Cuvierian organs ; I therefore opened another speci- 

 men, and found the cavity of the cloaca occupied by a mass of tubes, 

 just as I figured it in the case of H. nigra (P. Z. S. 1884, p. 374) ; 

 the third specimen had the tubes projecting from the vent, l)ut still 

 in organic connexion with the mass inside. 



In concluding this paper it may be convenient to give, in a sum- 

 mary form, an account of the present state of our knowledge of 

 the Echinoderm-fauna of the Sea of Bengal, taking as southern 

 boundaries Ceylon on the west, and the Nicobars on the east'. This 

 is a region which has not been touched by any recent explorations, 

 such as the ' Challenger,' ' Alert,' or ' Gazelle.' 



L Crinoidea. 



1. Antedon carinata, Leach. 



2. adeonse, Lamk, 



3. reynaudi, Miill. 



4. palmata, Mull. 



5. Actiuometra cumingii, Mull. 



6. fimbria ta, Miill. 



7. ]iarTicirra, Miill. 



^ In addition to the papers already cited, the list given by Dr. Liitken (Vid. 

 Med. 1871, p. 272) lias been used in the preparation of this summary. Infor- 

 mation as to the Ophiurids collected by the " Novara ' at the Nicobars is to be 

 found in Herr Marktanner-Turneretscher's paper in the ' Annalen des k. k. 

 Naturh. Mus.' ii. p. 291 ct acq. 



