134 THE ROTIFERA. 



intestine is frequently constricted and narrow towards its end. The gastric glands arc two 

 lobed. He further notices the lateral canals, and a bladder-like organ which he conjec- 

 tures to be the testicle, but which was probably the conti'actile vesicle. Two red globular 

 eyes are seated in the corona, not far asunder. The mature eggs, which are gi'een, are 

 carried at the posterior end of the body. There are three pairs of limbs attached to the 

 ventral surface. The foremost pair is the longest, the middle pair is less, and the lowest 

 pair is the least. Two streaked muscles run down the first pair of limbs, and one muscle 

 down each of the other four. All the limbs are terminated by fans of setic. II. poly- 

 2>tcra does not appear to have any ciliated processes on the dorsal hind surface. 



ADDENDA. 



[AsrLANCHNA MYEMELEO, EJirciiberg (vol. i. p. 123 : footnote). This interesting 

 species is no longer an alien. Mr. Hood has lately sent me, from Dundee, living and 

 healthy examples. They seemed to possess no contractile vesicle. — P.II.G.] 



[EnETMiA TEiTHKix, Gossc, sp. nov. (PI. XXVIII. fig. 2). Lorica a three-sided box, 

 of which the posterior end is a triangle, and carries a long elastic seta at each angle : 

 egg, when laid, carried between the alvine setaj. Length, y,Vr. inch. Lacustrine. — P.H.G.] 



[Eketmia tetrathkix. Hood, sp. nov. (PI. XXVIII. fig. 1). Lorica shaped like a 

 deep obconic wine-glass, of which the foot is represented by a very long straight seta : 

 three similar setas stand up from the occipital margin. Length, of lorica, y^^ uich ; total 

 ■fljf inch. Lacustrine. — P.H.G.] 



Notommata Werneckii, Ehrenhcrg. I am indebted to Mr. Fred. Bates for some 

 threads of Vauchcria scssilis bearing many of the galls caused by this parasitical Piotiferon. 

 Mr. Bates says that he has found the animal in abundance inhabiting these galls, which 

 may occur anywhere along the thread of the VaucJieria : but that he has not found the 

 parasites in the reproductive cells (see vol. i. p. 39). 



Length (according to Balbiani), yj^ inch. Habitat. Neighboui-hood of Leicester 

 (Mr. F. Bates). 



CEciSTES PTTGUEA, Ehreiiberg (PI. XXX. fig. 3). This is no doubt Ehrenberg's 

 rtygura meliccrta. It has a two-lobed corona ; a wide dorsal gap ; no visible ventral 

 antennae ; a pair of large dorsal hooks, adnate for half their length ; a stout wrinkled 

 foot; and an irregular floccose tube. It was found last May, at Twickenham, by j\Ir. 

 G. Western, who kindly sent me the living specimen, from which fig. 3 has been di'awn. 

 Its position, in one of the axils of the plant to which it was attached, prevented me from 

 measuring it ; but it seemed to be about the size of an ordinary (Ecistcs crtjstallinus. 



The following remarkable Eotifera are as yet unknown in Britain. 



Balatko calvus (PL XXX. fig. 6), Ed. Claparcde (15). This is an il-loricated 

 Eotiferon, parasitic on different species of Oligochata. Its pecuhar hind extremity is 

 shown m the figure. Mastax very small, containing two minute ciu-ved rami ; stomach, 

 simple and straight ; ovary large ; ciliary wreath and antenna wanting ; nervous, and 

 vascular systems apparently absent. 



Deilophaga BUCEPHALUS (PI. XXX. fig. 5), F. Vejdovsky (150). An il-loricated 

 Proales-like Rotiferon, parasitic on Lumbricnlus varicgatus ; it adlieres by its tropin to 

 the worm's hinder segments, and sucks its juices ; nutritive, secreting, and vascular 

 systems normal. 



Seison Gkubei (PI. XXX. fig. 4), C. Claus (17, 18). A doubtful Rotiferon ; il-lori- 

 cated, of extraorduiary form, parasitic on Nebalia ; ciliary wreath a few cilia at the 

 mouth ; secreting system highly developed ; nutritive system present in the male as 

 well as in the female ; vascular system very rudimentary ; jaws rotiferous. 



