REPORT ON THE PENNATULIDA. 5 



zooid-like individuals on that part of the margin which runs out upon the rachis. 

 Polyp-cells of the larger polyps united inferiorly, free at their ends, which are surrounded 

 by short spines. 



Ventral zooids, three in number, longitudinally disposed at the base of each pinnule. 

 Lateral zooids, three to four, at the dorsal side of the ventral zooids along the base of the 

 pinnules. All the zooids are small, white, and surrounded by red spicules. 



Eachis small, thicker than the stem. Colour of pinnules and rachis pale red, polyps 

 white. Stem white, with a small enlargement at each end. Calcareous needles of the 

 common type ; the red needles of the feather measure 0"53 mm. by 0"028 mm. Colour- 

 less needles of 0"15 to 0"20 mm. in length, and 0'020 to 0'026 mm. in breadth, are 

 situated in the cutaneous layer of the upper part of the stalky and the end bulb contains 

 minute oblong and round calcareous corpuscles of 3 to 12 ju,. The Challenger collec- 

 tion contains two specimens of this Pennatulid, one pretty well preserved and a second 

 in a fragmentary state. 



A. B. 



Length of the feather, ... 



Length of the stalk, ..... 



Length of the pinnnles, .... 



Breadth, ...... 



Breadth of the rachis, ..... 



^o6ito^.— Station 235, south of Japan, lat. 34° 7' N., long. 138° 0' E. Depth, 

 565 fathoms. Bottom temperature, 3°'3 C. June 4, 1875. 



3. Pennatula murrcnji, n. sp. (PL II. figs. 6, 7). 



Small, yellow and red in colour. Pen twice and a half as long as the stalk. Pinnules 

 lanceolate, triangular, transparent, with nine to ten polyps on their margin ; calyces with 

 well developed spines. Zooids ventral and lateral, the ventral of two kinds, two large at 

 the base of each pinnule and many smaller, forming one longitudinal row on each side. 



Pinnules lanceolate, thin, transparent, yellow, with a vermilion-coloured ventral 

 border; twenty-one to twenty-two in number, attached nearly parallel to the longitudinal 

 axis of the rachis, but so that the dorsal upper end of their base reaches the dorsal middle 

 line. 



Polyps nine to ten on the more developed pinnules, placed in one single row on the 

 dorsal margin ; calyces the colour of minium, with eight well-developed spines. 



Eachis yeUow, with ventral and lateral zooids. The ventral zooids are of two kinds. 

 Larger spiny and reddish zooids, two in number, are situated at the base of each pinnule 

 just opposite the middle part; smaller and whitish rudimentary polyps are disposed in 

 one single row on each side between the larger ones. Zooids of the same kind are also 

 placed laterally between the pinnules in a single or partly double row, so that they are 

 only visible from the ventral side of tlie feather. The lower part of the rachis of the only 



