324 THE VOYAGE OF H.M.S. CHALLENGER. 



the apical stigma of the pyriform pneumatophore was surrounded by a brown pigment- 

 star with eight rays ; the siphons were orange coloured, and the clustered gonophores, 

 attached near to their base, yellowish, the long tentacles similar to those of Nectop>hysa 

 (PI. XXIII. figs. 5, 6). Very similar is Rhizophysa inermis, Studer (40, p. 13, Taf. i. 

 figs. 3, 8, 9, 10), taken in the eastern part of the Indian Ocean, south of Sumatra 

 (lat. 11° 18' S., long. 120° 8'E.). Studer tells us that this deep-sea form has no tentacles, 

 but he describes and figures tentacles with a series of simple tentilla (fig. 10), apparentlj* 

 attached one to the base of each gonophore. I have no doubt that this was the usual 

 tentacle, arising from the base of the siphon, strongly contracted and twisted around the 

 base of the neighbouring gonophore. 



Genus 67. Cannophysa? Haeckel, 1888. 



Camiophysa, Hkl., System der Siphonophoren, p. 44. 



Definition. — Khizophysidas with ordinate cormidia and free internodes of the stem, 

 the gonostyles being attached at the base of the siphons. Tentilla trifid, with three 

 terminal branches. 



The genus Cannophysa has the same ordinate cormidia as the preceding closely 

 allied Aurophysa. It differs in the structure of the tentacles and the form of the 

 tentilla, which are not simple lateral branches of the former, but each provided with three 

 terminal appendages at the distal end. Cannophysa, therefore, bears the same relation 

 to Aurophysa as in the following subfamily (Linophysidas) Pneumophysa has to 

 Nectophysa. A beautiful species of this genus was observed by me in January 1867 

 in the Canary Island Lanzerote; it is described in the following pages (PI. XXIV.) 

 as Cannophysa murrayana, and dedicated to my honoured friend Dr. John Murray. 

 A similar sj>ecies, differing in the special form of the pneumatophore and the tentilla, was 

 found in the Tortugas, near Florida, and described in 1882 by Fewkes as RJiizophysa 

 gracilis (44, p. 269, pi. vi. figs. 1-6). 



Cannophysa murrayana, n. sp. (PI. XXIV.). 



Habitat. — North Atlantic, Canary Islands, Lanzerote, January 7, 1867 (Haeckel). 



Corm. — Two living specimens, both very movable and integral, were captured by 

 me in a current off Puerto Arrecife ; the smaller was a young specimen without gono- 

 phores, and is figured in the expanded state, swimming with snake-like motion, in fig. 3 

 (twice natural size) ; the larger was a fully developed specimen with ripe gonophores, and 

 is figured in the contracted state with spirally coiled up stem in fig. 1 (in profile), and 

 fig. 2 (from above), slightly enlarged. The fully expanded corm attained a length of 



1 Cannophysa = Tube-bladder, xauua, Qvax. 



