EHIZOPODA YhOM NORTH AND SOUTH AMEEIGA. 217 



Length (without horns) 120-140 fi ; breadth 100-125 w- ; aperture 

 ■32-40 fi ; thickness 0*5 to O'G of the breadth ; length of horns 20-30 fi. 



Habitat. Sphagnum. 



Distribution. — Sandia, Peru. 



In the small quantity of material available some ten individuals were 

 found, but owing to the fragile nature of the horns many of these were 

 imperfect. The test is opaque, strongly constructed, and of a robust form, 

 the outlines follow regular curves, being free from excrescences ; the 

 crenulations around the aperture are often pronounced^ resembling those of 

 Nehela dentistoma, a species to which it bears a close likeness when deprived 

 of the spines. It is distinguished from Nebela caudata (fig. 17), a species 

 found in association with it, by its much larger size and robust form, its 

 more regular outlines and greater number of spines. Encysted individuals 

 contained plasma of normal appearance. 



Nebela scutellata, Wailes (16), p. 139, pi. 12. figs. 11, 12. 

 ISTot uncommon and quite typical. 



Distribution. — Puntas Arenas (sphagnum) ; Mt. Corcovada (sphagnum) 

 ■and Rio Janeiro (shore moss) ; United States (16) ; Seychelles (16). 



Nebela tropica, Wailes (16), p. 140, pi. 12. figs. 13, 14. 

 Found in association with the preceding. 



Distribution. — Puntas Arenas ; Rio Janeiro ; Peru (7) ; Borneo (16) ; 

 Seychelles (16). 



Nebela vas, Certes (3), p. 15, pi. 1. figs. 4 & 5. 



Not uncommon in some of the gatherings of sphagnum, and of moderate 

 size. A certain amount of variation was observable in the neck, the base 

 varying considerably not only in width but in the depth of the depression or 

 groove at the point where the neck is attached to the body of the test ; some 

 individuals in broad view closely approached W. lageniformis in appearance, 

 but in side view the difference was pronounced. 



Length 130-155 /u.; breadth 85-103 yu. ; aperture 26-32 /a. 



Distynbution. — Puntas Arenas ; Rio Janeiro ; Cape Horn (length 140— 

 170 //,, Certes) ; Antarctic, Australasia, Fiji, Hawaii, and British Columbia 

 {Penard). 



Penard found the usual size to be 160-165 fx in length, but in New 

 ealand a small form occurs 95 jm in length (11). 



