Ilydatinaea.'] infusorial animalcules. C49 



investigation, turn out to be the case, we shall have, among the 

 Rotifcra, tlic same mode of preserving the ova during the winter, 

 as is found in some of the Enfoinostraca, the Bajyhnuc for instance." 



" These (the males) arc smaller than the females, and have a 

 pyriform sac below, from whicli there is an opening, and which is 

 filled with spermatozoa ; and they have neither jaws, nor gullet, 

 nor stomach ; and it would seem they are designed, as is the case 

 with the males of some insects, to continue the race and then to 

 perish. ... I liave lately repeatedly seen the male in connection 

 with the female. He attaches himself to her side by his sperm- 

 tube, and remains attached from twenty to seventy seconds." 



For a more complete description of these very interesting forms' 

 we may refer the reader to the elaborate details and figures 

 of their organization, by Mr. Dalrymple, in the " Philosophical 

 Transactions" for 1849. 



AsPLANCHNA PHodonta (Gosse.) Females. — Jaws serrated ; eyes 

 three ; stomach hemispherical, transverse ; vesicle spherical, smaller ; 

 tremulous, bodies attached to a twisted and plicate filament ; ovary 

 subglobose, (P. 23, f. 9.) Length about l-48th. J/ff/es.— Pody 

 acute. (P. 23, f 7, 8.) Length 1- 110th. Found in the Serpentine 

 Eiver. (P. 23, and f. 11, 12, exhibit the jaws of the female 

 detached.) 



Genus Taphrocajipa (Grosse.) — Rotary organs wanting, body fusi- 

 form, annulose ; tail forked ; gizzard oval ; mallei incurved, shorter 

 than incus, which is also incurved. 



T. annulosa. — Occipital mass opaque, white ; alimentary canal 

 simple, wide, cylindrical ; points of tail short, conical. Length 

 1-1 10th. This species is evidently allied to M. Dujardin's Lindia 

 torulosa, but differs from it in the structure of the dental apparatus, 

 and of the digestive canal. It seems to connect the genus Choe- 

 tonotus with the Hydatinoeous genera Notommata and Furadaria, for 

 it has the jaws of these larviform Rotifer a, and the glandular 

 occipital mass found in some of them, with the form, simple 

 digestive canal and manners of Clioetonotns. Found at Leamington. 



We wiU append here two genera of the family Furculariens, of 

 Dujardin, which that naturalist has created either to embrace new 



u u 



