CAMPTOPLITES 463 



Station distribution. Not represented in the Discovery collections. 



Geographical distribution. Off Valparaiso, 3953 m. ; off Crozet Islands, 2928 m. (Busk). 



Busk's figures were drawn from the material from Challenger St. 147 (Crozet Islands) 

 which must be taken as the type. The slide figured by Busk is no. 99 . 7 . 1 . 284. Ovicells 

 are abundant in this material, but were not figured. They are all at an advanced stage of 

 development and no radial phase has been seen, the sculpture being coarsely punctate 

 or papillate (Fig. 53 C). Busk only mentions one kind of avicularium, but the two 

 types commonly found in the reticulatus group of Camptoplites (see p. 435) are present 

 (Fig. 55 G, H). 



' ■ ' ■ 1 ■ ' ■ I 1 I 

 A -5nnm 



5mm 



Fig. 52. Camptoplites rectilinearis sp.n. A. St. TN 339, Ross Sea. Bifurcation showing axillary chamber 

 with runners and frontally directed rootlet. Ovicells young. B, C. Avicularia from same colony as 

 Fig. A. D. St. TN 314, McMurdo Sound. Older ovicell. 



ax.c. axillary chamber, ect. edge of calcareous part of ectooecium, r. rootlet, ru. runner. Axillary 

 chamber, runners and rootlet stippled. 



The specimen from Challenger St. 299 (off Valparaiso, 87 . 12 . 9 . 185) has neither spines 

 nor ovicells. The specimens from Challenger St. 320 and St. 308 (see footnote, p. 466) 

 belong to a distinct species described below as C. asymmetricus. 



Busk distinguished a variety, C. reticulatus var. unicornis, by the presence of " a tubular 

 cylindrical spine arising from the back near the top ", but such spines are also present in 



