1891.] Walsh — ^Investigator' Deep-sea Holotlmrians. 203 



April llth, 1888, 7 miles S. E. by S. of Ross Island, Andaman Sea; 

 265 fathoms, green mud (Wood-Mason). 



16. A. MARENZELLBBi, Theel, 1. c, p. 41. 

 One specimen. 



Station 55, 13th— 14th April, 1889, Bay of Bengal, 30 miles W. of 

 Middle Andaman Island (Cape Bluff), 480 — 500 fathoms, globigerina 

 ooze (Alcoch). 



17. EuPTKGUS SCABER, Liitken, Videnskab. Meddel. Kjobenhavn 

 1857, p. 23. 



After some indecision as to the correct title of these specimens I 

 have thought it better to name them as above. In general form and 

 appearance they all agree with Echinosoma hispidum, Semper, Reis. in 

 Philipp. 1867, p. 44, but differ from Eupyrgus hispidus, Barrett, Ann. 

 Mag. Nat. Hist, xx, p. 46, which Semper gives as a synonym of his 

 Echinosoma, in having no sucker feet. In the Challenger Report, vol. 

 siv, HoL p. 49, Echinosoma hispidum, Semp. is given as a synonym of 

 Eupyrgus scaler, Liitken, and the Eupyrgus of Barrett is not mentioned. 



Three specimens. 



January 16th, 1888, off Cinque island, Andaman Sea, 650 fathoms 

 (Giles.) 



Station 107, October 23rd, 1889, Laccadive Sea, lat. 8° 23' N., 

 long. 75° 47' E., 738 fathoms, green mud, bot. temp. 41-9° (Alcock). 



Station 116, December 9th, 1890, Bay of Bengal lat. 11° 25' 5" N., 

 long. 92° 47' 6" E. off Cinque and Rutland islands, 405 fathoms, 

 green mud, bot. temp. 47° (Alcock). 



18. Trochostoma andamanensb, n. sp. 



This species is very closely allied to T. antarcticum, Theel, Chall. 

 Rep. vol. xiv. Hoi. p. 44. 



Length 90 mm. 



Body cylindrical and narrowed behind into a tail-like extremity. 

 Skin rough but thin. In spirit the ground colour has become greenish- 

 grey and the spots are more or less blood-red. The tentacles fifteen in 

 number, are yellow and between every two there is, near the base, a blue- 

 black triangular mark. Each tentacle has three very small digits at 

 the free end. Mouth and anus terminal, the latter without teeth, but 

 in one specimen with numerous fine papillae. One Polian vesicle, one 

 free stone canal ; 2 (3 ?) lungs, not much branched ; one bundle of 

 yellow genital tubes. The radii of the calcareous ring are produced back- 

 wards as spines. Calcareous bodies not very numerous consisting of a few 

 wide-holed plates and tower like rods which are perforated with 4 to 6 



