242 discovery reports 



Locality. 



St. 152. 17. i. 27. 53° 51' 30" S, 36° 18' 30" W. Gear DLH. 245 m. Two specimens. . 



St. 156. 20.1.27. 53° 51' 00" S, 36° 2i' 30" W. Gear DLH. 200 to 236 m. One specimen. 



St. 158. 21. i. 27. 53° 48' 30" S, 35° 57' 00" W. Gear DLH. 401 to 411m. Large collection. 



St. WS 71. 23. ii. 27. 6 miles N 60° E of Cape Pembroke Light, East Falkland Islands. 

 51° 38' 00" S, 57° 32' 30" W. Gear OTC. 82-80 m. Three specimens. 



St. WS 72. 5. iii. 27. 51° 07' 00" S, 57° 34' 00" W. Gear OTC. 95 m. One specimen. 



St. WS 84. 24. iii. 27. 7|- miles S 9° W of Sea Lion Island, East Falkland Islands. From 

 52° 33' 00" S, 59° 08' 00" W to 52° 34' 30" S, 59° 11' 00" W. Gear OTC. 75-74 m. Two specimens. 



St. WS85. 25. iii. 27. 8 miles S 66° E of Lively Island, East Falkland Islands. From 52° 09' 00" S, 

 58° 14' 00" W to 52° 08' 00" S, 58° 09' 00" W. Gear OTC. 79 m. Small fragments. 



St. WS 97. 18. iv. 27. 49° 00' 30" S, 61° 58' 00" W. Gear OTC. 146-145 m. Large collection. 



St.WS2ii. 29.V. 28. 50° 17' 00" S, 60° 06' 00" W. Gear OTC. i6i-i74m. Four specimens. 



St. WS 216. I. vi. 28. 47° 37' 00" S, 60° 50' 00" W. Gear N7-T. 219-133 m. Seven specimens. 



From stations 158, WS 97, and WS 211 a considerable quantity of material was 

 obtained. The material from station 158 consisted of small tuft-like colonies with radiating 

 spines. The yield from stations 152 and 156, WS 71, WS 84, WS 97, WS 211, WS 216 

 consisted of long cyUndrical branching colonies. 



For the sake of convenience the short tuft-like colonies obtained from station 158 

 will be called Form A and the branching cylindrical form Form B. Although the habit 

 of growth of the two forms is quite distinct the structure of the coenoecium and zooids 

 is the same in both forms. 



Form A. Most of the material was collected at station 158, from a depth 401 to 41 1 m. 

 Small pieces were obtained from stations 152 and 156 at depths of 245 m. and 200 to 

 236 m. respectively. Since variation in size and structure is not met with, this form 

 can be regarded as a distinct type of the species. The coenoecium in the preserved 

 condition is light brown. The colony consists of a basal region of thick bars and spines 

 forming a meshwork from which spines radiate on all sides except basally. The spines 

 are thick, straight and tapering and measure 12 to 17 mm. They may be forked or 

 branched. The origin and growth of spines are the same as in C. hodgsoni, that is, by 

 deposition of coenoecial substance locally in the form of lamellae. A section of the spine 

 shows two distinct regions. A transparent core of thin consistency surrounded by a 

 firm, reddish brown, outer layer formed by a number of close lamellae. 



A few colonies are slightly larger than the rest and have longer spines with pointed 

 tips, though generally the spines measure 1-2 to 2-3 cm. and possess blunt or pointed 

 tips. They are straight except for slight occasional curvature of the distal part of the 

 spine by preservation. 



When lamellae are deposited on the spine they may enclose any particles which are 

 adhering to the surface of the older layer. Masses of sand grains, enclosed between 

 layers of lamellae, appear like nodules on the side. In one instance a slender branch of 

 a polyzoan colony was attached to the tip of the spine and had been almost enclosed by 

 coenoecium. 



The structure of the coenoecium of this species is such that it cannot be included in 



