BY VERA IRWIN-SMITH. oa 



both there is a reduction of the denticular fomiation on the inner face of the 

 lip; the male caudal bursa has an elongated form in both, and the figures show 

 that the ai-rangement of papillae and ehitinous processes is aUke. 



Physaloptera dentata Linstow, 1883. 

 ? Synonym. — Physaloptera aloisii-sabaudiae Parona, 1907. 



Lips very large, with a median papilla on each. External labial tooth big, 

 ■wedge-shaped, with a small tooth attached to its internal base. Caudal extremity 

 of female conical, with rounded point, one twenty-fifth of the leng'th of the whole 

 body. Eggs very numerous, thick-shelled. Male tail one eleventh of the length 

 of the body. Conical processes arranged on wings of bursa in longitudinal rows. 

 Of the post-anal papillae 1 and 2 close together, often merging into one big one. 

 See figure, for general arrangement of papillae. Measurements as given in table. 



Fhtsaloptera aloisii-sabaudiae Parona, 1907. 



Body attenuated anteriorly for a third of the total leng-th. Mouth with two 

 large lips; one papilla on each lip; big teeth, with a series of spines. Head 

 with two oval membranous lobes, with continuous margins. Intestine in male 

 straight, in female sinuous in the posterior half. Caudal extremity of female 

 short, with rounded point. Vulva prominent, with smooth circular outline. Eggs 

 in immense numbers, oval, thin-shelled. Male spicules stout, long, and unequal. 

 Anterior end of testis extending right beyond the base of the oesophagms. Caudal 

 bursa lanceolate, margins not lobed, without spines ('senza aenlei') on its surface. 

 External papillae with long peduncles; 2 and 3 post-anal shortly pedunculate. 



Parona makes a note of the similarity between this species and the descrip- 

 tions of P. dentata, and P. abbreviata. It seems probable that it is identical with 

 the former. They were found in different species of the same host genus 

 (Agama) ; the lengths are about the same, and although the descriptions of both 

 are very meagre, they agTee in important isarticulars. No figure is given of the 

 caudal bursa of P. aloisii-sabaudiae, but the absence of the usual cuticular granu- 

 lations on the circum-cloacal region is a very distinctive feature, and, in the 

 figure of the caudal bursa of P. dentata, it is seen that these formations are con- 

 fined to the marginal wings, the region round the cloaca being, apparently, quite 

 smooth. P. dentata, too, is figured with the straight, not lobed, edge to the bursa, 

 which is described for P. aloisii-sabaudiae. And, in each case, mention is made 

 of a single median papilla on each lip. 



Phtsai-optbra sonsinoi Linstow, 1895. 



External labial tooth conical. A pair of small submedian papillae on. each 

 lip. Caudal extremity of female rounded, and curved dorsally. ? tail one-eigh- 

 teenth of whole leng'th. Eggs very thick shelled. Twenty three papillae on 

 caudal bursa, unusual in size and an-angement, as shown in figure, c? tail l/'9.25 

 of the body leng'th. See measurements in table. 



Physaloptera spiralis Schneider, 1866. 



External labial tooth pointed, inner tooth absent. Inner side of each lip 

 beset with spines; a pair in the median line below the base of the tooth, another 

 pair on each side near the margin of the lip, and, dorsally and ventrally, on the 

 base, a row of about five. Caudal extremity, in female, dorsally curved or coiled 

 in a spiral ; in male, straight. Measurements as given in the table. 



