1891.] Walsh — ' Investigator ' Deep-sea Holotliarians. 199 



The lateral ambulacra possess a single row of feet much longer than 

 those on the middle ambulacrum. Just above this row of feet there 

 is a I'ow of long, pointed processes ; these average 15 mm. in length. 

 The dorsal ambulacra are furnished with a double row of processes ; these 

 are shorter than the lateral ones. One polian vesicle ; one stone 

 canal ; one bundle of genital tubes which are branched and furnished 

 with irregular dilatations. Calcareous ring small ; muscles poorly 

 developed relatively to the size of the animal. 



The calcareous bodies consist of large, round, many-holed plates, 

 the centre holes being fairly large, the, marginal ones small. Besides 

 these plates, a few branched spicules are present. 



This species is very closely allied to P. moseleyi, Theel. 



Numerous specimens. 



January 2nd, J 888, off Port Blair, 271 fathoms, bottom green mud 

 ( Giles) . 



April 12th, 1888, 7| miles E. of N. Cinque Island, Andaman Sea, 

 490 fathoms, bottom green mud (Wood-Mason). 



Station 115, December 9th, 1890, Andaman Sea, lat. 11° 31' 40" N., 

 long. 92° 46' 40" E., off Dyer Point and N. of Cinque island, 188—220 

 fathoms, green mud, bot. temp. 56° (Alcock). 



Amphigymnas, nov. gen. 



Body ovoid with narrow tail-like extremities ; soft and appears to 

 have been surrounded by a jelly-like material when fresh. Eeet very 

 numerous over the whole of the trivium and placed more or less irre- 

 gularly. Lateral margins with two or three rows of long processes. 

 Back covered with processes except near the mouth and anus where 

 the body tapers and where the dorsal surface is naked ; mouth terminal, 

 small ; tentacles 15, very small and retracted ; anus terminal, small. 

 Calcareous bodies moderate sized, irregularly rounded, many-holed 

 plates somewhat like those of Pannychia. Calcareous ring of 5 small 

 pieces loosely connected. 



7. Amphigymnas multipes, n. sp. 



Length 80 mm., width near middle of body 22 mm. ; at oral and 

 anal end about 9 mm. 



Colour (in spirit) pale purple ; the long lateral processes measure 

 about 15 mm., those on the back are shorter. 



One specimen. 



Station 115, December 9th, 1890, Andaman Sea, lat. 11° 31' 40" N., 

 long. 92° 46' 40" E., off Dyer Point and N". of Cinque island, 188—220 

 fathoms, green mud, bot. temp. 56° {Alcoch). 



