REPORT ON THE PENNATULIDA. 



15 



The axis is round, and tolerably strong. 



Calcareous corpuscles in the end of the stalk' oblong, of the same form and size as in 

 Anthoptilum thomsoni. 



The measurements of the only specimen are — 



Length of the -wTiole polypidom, 



510 mm 



Length of the whole stalk, .... 



76 



Length of the lower polyps, .... 



fi-10 



Length of the tentacles, .... 



3-4 



Breadth of the stalk, ..... 



3-4 



Breadth of the rachis, . . . . - 



4-5-5 



Habitat. — Station 50, North Atlantic, south of Halifax, lat. 48° 8' N., long. 63° 

 39' W. One specimen. Depth, 1250 fathoms. Bottom temperature, 2°-8 C. Grey ooze. 

 May 21, 1873. 



3. Anthoptilum simplex, n. sp. (PL IV. fig. 22). 



Polypidom colourless. Polyps sessile, widely separated, very large with a broad base, 

 two in each row. Rachis free on both sides in the middle line. Zooids numerous, 

 more elevated than in the other two species, and somewhat conical. 



Stalk with an enlargement in the upper part. 



Polyps long and large, resembhng in size those of A. thomsoni, and measuring 

 without the tentacles 12 to 15 mm. in length. The tentacles, of which there exist only 

 traces on some polyps, seem to have been very long. A remarkable feature is the large 

 area of elliptical form upon which each polyp stands, and which may be regarded as a 

 broad base to the polyp. 



The zooids are to be found in the same position as in the other species, and difler only 

 by their greater elevation on the .surface of the rachis and theii- smaller size, as they 

 measure only 0-28 to 0"30 mm. in diameter. The ventral zooids form a single or double 

 series, and the dorsal a double or triple series. 



Calcareous corpuscles as in the other species. 



Measurement as follows : — 



Lengtli of the whole polypidom. 

 Length of the stalk, 

 Breadth of the stalk, 

 Breadth of the rachis, 



400 mm. 

 55 

 7 

 4-5 



Hahitat. — One single specimen in a bad state of preservation, from Station 133, South 

 Atlantic, west of Tristan d'Acunha, lat. 35° 41' S., long. 20° 55' \V. Depth, 1500 fathom.s. 

 Bottom temperature, 1°"3 C. Globigerina ooze. October 11, 1873. 



