REPORT ON THE PENNATULIDA. 



19 



0'42 to 0"58 mm. ia heigiit find breadth at their bases. They are all surrounded with 

 needles, which frequently form a kind of cell ending with several points. 



Jlahitat.— Station 106, Atlantic Ocean, a little north of the Equator, lat. 1° 47' N., 

 long. 26° 46' W. Depth, 1850 fathoms. Bottom temperature, 1°"8 C. Globigerina 

 ooze. August 25, 1873. 



3. Umbellula thomsoni, KoU. 



(Von Willemoes-Suhm in Zeitschrift f. ■Rdss. ZooL, 1873 ; KoUiker in Wurzburg. 

 Verhandl., Bd. viii., 1874, and in Die Pennatulide Umbellula und zwei neue Typen 

 der Alcyonarien, Wurzburg, 1874, Festschrift, pp. 1-11, Taf. i. figs. 1-5.) 



Indistinctly bilateral, colourless. Calcareous corpuscles in all parts of the sarco- 

 soma. Polyps forming a pendant bunch, with a distinct rachis containing the end of 

 the axis, which goes near the bases of the terminal polypi. Stalk C[uadrangular, with 

 a well-developed lower, but no upper, enlargement. Zooids on the ventral and dorsal 

 sides of the rachis ; none on the stalk. Axis cpadrangular, with excavated surfaces 

 and rounded edges. 



For further details I refer to the paper above quoted, and only adjoin here the 

 measurements of the two specimens of this Umhellula. 



A. B. 



Length of the whole polypidom. 



Length of the lower enlargement of stalk. 



Length of the polj'ps, 



Length of the bodies of the polyps. 



Length of their tentacles, . 



Breadth of the axis, 



Kuniher of polyps, . 



Number of rudimentary polyps, 



Length of needles of tentacles. 



Breadth of needles of tentacles, 



Length of needles of stalk at its lower end, 



Breadth of needles of stalk at its lower end. 



Habitat. — Station 7, North Atlantic Ocean, between Portugal and Madeira, lat, 

 35° 20' N., long. 13° 4' W. Depth, 2125 fathoms. Bottom temperature, 2°-0 C. Mud. 

 January 31, 1873. 



I add here some remarks on the Umbellulce described by Joshua Lindahl (Om. 

 Pennatulid slaegtet Umbellula, Stockholm, 1874; Kongl. Svenska Vet. Akadem. 

 Handlingar, Bd. xiii.. No. 3). These UmbeUulce, called by Lindahl miniacea and 

 pallida, and brought together by me (foe. cit) under the name of U. lindalili, come 

 very near my U. magniflora, but so long as we are unable to compare the difierent 

 forms, it will be impossible to decide whether they are identical or not, particularly 

 as the remoteness of the localities in which the Umbellulce of Lindahl (in Baffin's 

 Bay, lat. 70° 43' N., long. 52° 3' W., depth 410 fathoms; and off the entrance of 



