86 SPOROZOA. 



Remarks. — Setna (1931) has described the Gregarine as 

 septate, and placed it in the family Poljo-habdinidse Kamm. 

 Reichenow (1929), however, considers that the presence 

 of a septum in Polyrhabdina as described by Kamm is an error, 

 and the septate appearance is due to the protoplasm in the 

 anterior portion of the body being more finely granular. 

 He has consequently amalgamated the family Polyrhabdinidse 

 with Lecudinidse. Setna describes and figures the protoplasm 

 as dark and finely granular throughout, and indicates the 

 septum as a clear area, which may be an artefact. 



25. Ferraria cornucephali Setna. (Fig. 27.) 



■fFerraria cornucephali, Setna, 1931, pp. 205-6, pi. v, figs. 3-5 ; 

 pi. vi, fig. 1. 



A soHtary, rather stout-bodied Gregarine. Epimerite a mde- 

 mouthed, funnel-like structure on a long, slender, tubular 

 stalk. Nucleus large and spherical, with a large qentral 

 karyosome. In the digestive tract of a polychsete, quite 

 commonly attached to the intestinal wall, or free in the lumen 

 of the gut. 



Fig. 27. — Ferraria cornucephali Setna. (After Setna.) 



Dimensions. — Trophozoite, maximum 300 /x by 91 fx, 

 minimum 243 jU. by 81 ju. 



Remarks. — Setna has described the form as a septate Grega- 

 rme, but this is probably an error (see remarks under the genus). 

 He gives ratio of length of protomerite to total length of 

 trophozoite as 1 : 4 ; width of protomerite to width of deuto- 

 merite as 1 : 1-6. The anterior part (so-called protomerite) 

 is hemispherical to subglobular, widest Ijehind. The posterior 

 part (so-called cleutomerite) is elongated, cylindrical and 

 ovoidal, widest about its middle and well rounded posteriorly. 

 There is little or no constriction at the septum, which 

 appears to be indicated by a clear area between the anterior 

 and the posterior portions. 



Two distinct types of gametocj^sts and sporocysts were 

 encountered in the mid-gut of the host, but neither was 

 definitely associated with the trophozoites of this or of the 

 preceding species. One type consisted of spherical gameto- 

 cysts, measuring 90-100 fi in diameter, and full of oval sporo- 

 cysts, measuring 10 fx by 4-5 /x. Sporocysts escape by rupture 



