REPORT ON THE PENNATULIDA. 



19 



0-42 to 0-58 mm. in height and breadth at their bases. They are aU sm-rounded with 

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



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

 long. 26°46'W. Depth, 1850 fathoms. Bottom temperature, VS C. Globigerma 

 ooze. August 25, 1873. 



3. UmheUida thomsoni, Koll. 



(Von WiUemoes-Suhm in Zeitschrift f. wiss. ZooL, 1873 ; Kolhker in Wlirzburg. 

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

 der Alcyonarien, Wlirzburg, 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 quadrangular, with 

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

 sides of the rachis; none on the stalk. Axis quadi'angular, with excavated surfaces 



and rounded edges. • • i i 



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



measurements of the two specimens of this Uinbellula. 



Length of the whole polypidom. 



Length of the lower enlargement of stalk, 



Length of the polyps, 



Length of the bodies of the polyps, 



Length of their tentacles, . 



Breadth of the axis, 



Numher 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. 



A. 



895 mm. 

 80 



33-39 

 18-20 

 1.5-19 



2-5 

 13 



0-2-t-0-30 

 0-021-0-032 



oa.5 



006-i 



B. 



270 



17 

 10 



7 



0-7 



5 



5 



Habitat— ^inMo^ 7, North Atlantic Ocean, between Portugal and Madeii'a, lat. 

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



January 31, 1873. t • i 1 1 /n 



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

 Pennatulid slfegtet Umhellula, Stockholm, 1874; Kongl. Svcnska Vet. Akadem. 

 Handlingar, Bd. xiii.. No. 3). Tliese Umhelhdce, called by Lindalil miniacea and 

 pallida%m\ brought together by me {he. cit) under the name of U. Undcddi, come 

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

 forms, it will be impossible to decide whether they are identical or not, pai-ticularly 

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

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



