REPORT ON THE RADIOLARIA. 1551 



Subfamily 1. CAXNOBELIDA, Haeckel. 



Definition. C annorrhaphida with numerous hollow cylindrical or spindle- 

 shaped tubes, which lie tangentially scattered on the surface of the spherical calymma. 



Genus 658. Cannobelos, 1 n. gen. 



Definition. C annorrhaphida with a skeleton composed of tubular acicular 

 pieces, which are smooth, cylindrical or spindle-shaped tangential needles, without spines 

 and branches. 



The genus Cannobelos, and the following closely allied Cannorrhaphis, represent 

 the peculiar subfamily Cannobelida, differing from the other Cannorrhaphida in the 

 acicular form of the pieces of the skeleton, which are tangentially scattered on the 

 surface of the spherical calymma. The cylindrical or spindle-shaped hollow needles 

 are smooth in Cannobelos, whilst in Cannorrhaphis they are studded with lateral 

 spines or branches. 



1. Cannobelos cavispicula, Haeckel. 



Thalassoplancta cavispicula, Haeckel, 1862, Monogr. d. Radiol., p. 261, Taf. iii. figs. 10-13. 

 Tlialassicolla cavispicula, Haeckel, 1860, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 798. 

 Cannorrhaphis cavispicula, Haeckel, 1881, Prodromus, p. 470. 



Tangential tubes cylindrical, more or less curved, gradually tapering towards the two pointed ends. 

 Calymma with a voluminous phpeodium. 



Dimensions. Length of the tubular spicule 0'25, breadth 0003. 

 Habitat. Mediterranean, Messina, surface. 



2. Cannobelos calymmata, n. sp. 



Tangential tubes cylindrical, straight, of equal breadth throughout their whole length, closed by 

 a hemispherical cap on the two rounded ends. Calymma very voluminous, with a small phseodium. 

 Dimensions. Length of the tubular spicula 03 to 0'5, breadth O004 to O'OOS. 

 Habitat. Central Pacific, Stations 263 to 274, surface. 



3. Cannobelos thalassoplancta, n. sp. 



Tangential tubes spindle-shaped, straight, gradually tapering towards the two pointed ends. 

 Calymma and the included phteodium rather voluminous. 



Dimensions. Length of the tubular spicula 015 to 0'2, breadth in the middle part 0'02. 

 Habitat. Tropical Atlantic, Station 347, surface. 



1 Cannobelos = Bearing hollow tubular arrows ; xximot, , 



