1552 THE VOYAGE OF H.M.S. CHALLENGER. 



Genus 659. Cannorrhaphis, 1 Haeckel, 1879, Sitzungsb. med.-nat. Gesellsch. 



Jena, Dec. 12, p. 4. 



Definition. C annorrhaphida with a skeleton composed of tubular acicular 

 pieces, which are spiny, cylindrical or spindle-shaped tangential needles, either with 

 lateral spines or branches. 



The genus Cannorrhaphis differs from the preceding closely allied Cannobelos 

 in the spiny shape of the tangential acicular spicula, which are studded either with 

 short spines or with longer lateral branches. 



1. Cannorrhaphis spinulosa, n. sp. (PI. 101, figs. 3, 4). 



Tangential tubes cylindrical, straight, gradually tapering towards the two pointed ends, densely 

 studded with conical spines, arising perpendicularly. (The specimen figured, fig. 3, exhibited two 

 ovate central capsules, each of which contained two large nuclei, with numerous nucleoli.) 



Dimensions. Length of the tubular spicula 0'3 to 0'5, breadth O'Ol to O015. 



Habitat. North Pacific, Station 244, surface. 



2. Cannorrhaphis lampoxanthium, n. sp. 



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

 densely studded with irregular conical spines of unequal length, which arise obliquely from their 

 surface. 



Dimensions. Length of the tubular spicula 0'4 to - 5, breadth O005 to O008. 



Habitat. South Pacific, Station 289, depth 2550 fathoms. 



3. Cannorrhaphis lappacea, n. sp. 



Tangential tubes spindle-shaped, gradually tapering towards the two pointed ends, densely studded 

 with irregular lateral branches, which are partly simple, partly forked, more or less curved, and 

 arise obliquely from their surface. 



Dimensions. Length of the tubular spicula 0'2 to 0'3, breadth 0'015 to 0'025. 



Habitat. Central Pacific, Station 271, surface. 



4. Cannorrhaphis spathillata, n. sp. (PL 101, fig. 5). 



Tangential tubes cylindrical, thin and straight, regularly zigzag, with pointed, regularly alternat- 

 ing lateral spines, with an elegant spathilla, or a cap-shaped verticil of eight to ten recurved spines 

 on the two ends. 



Dimensions. Length of the tubular spicula 0'3, breadth 0'003. 



Habitat. Indian Ocean, Cocos Islands (Eabbe), surface. 



1 Cannorrhaphis- Bearing hollow tubular needles ; xarra, ptttfii. 



