EHIZOPODA FROM THE SEYCHELLES. 157 



Heleopera sylvatica, Penard. 



Rare. Length TOyit. ' 



Genus Hyalosphenia. 

 Hyalosphenia elegans, Leidy. 

 Several seen. Length 80-85 [i. 



H. SUBFLAVA, Casli. 



Many were abnormally short and broad. Length 45-G5/U-; breadth 30- 

 45^. 



Genus Lesquerusia. 

 Lesquerusia modesta, RhnnUer. 



This is a pond form. Several seen, all about 80 /x in length ; &2 /x in 

 breadth ; aperture 21/* in diameter. 



Genus Nebela. 

 Nebela collaris, Leidy. 

 Not common and below the usual size. Length 95-110 /x. 



N. gracilis, Penard. (Rev. Suisse Zool. 1910.) 



Var. STOMATA, var. nov. (PL 12. figs. 41 & 42.) 



This variety differs from the type in the possession of two evaginated 

 pores, one on either side of the neck. Similar protuberances occur on other 

 Nehelce, i. e. N. tuherosa and N. americana. Individuals also occur here of a 

 more slender form than shown in figs. 41 & 42, with a long, slender neck ; 

 they are below the average size, measuring about 90 /u, in length. 



Length 90-130 fi ; breadth about half the length or less ; thickness two- 

 thirds of the breadth ; aperture oval, about 20 /t by 13yLt, slightly notched in 

 narrow view. 



Pistrihution. Peru (1. 107-130 yit) ; Long Island, U.S.A. (1. 100-116 /i). 



N. LAGENiFORMis, Penard. 



Rare but quite typical. Length 120-130 fj,. 



Var. MINOR, var. nov. 



A small form, which differs from the type in size only, is not unconmion ; 

 the individuals observed varied from 85-100 /x in length. 



