629 



ROTIFERA. 



ROTIFERA. 



Brachionus urceolarit. 



e t cilia rotatoria ; />, pharynx ; <, stomach ; ap, appendages to stomach ; 

 or, ovarium ; o, eye ; i, muscles ; q, tail ; b b, internal branchite ; ca t branchial 

 canal. 



From the previous observations on structure it will be seen that this 

 arrangement is open to many objections. 



Dnjardio, who was one of the earliest observers that pointed out 

 the defects of Ehrenberg's arrangement, has proposed the following : 

 Order I. Syitolides.VaieA by a pedicel. 

 Family 1. Floscularians. 

 Family 2. Melicertians. 



Order II. Swimming Systolidet. 

 Family 3. Brachionians. 

 Family 4. Furculariana. 

 Family 5. Albertians. 

 Order III. Syitolida. Alternately swimming and fixed. 



Family 6. Rotifers. 

 Order IV. Crawling Syttotida. 



Family 7. Tardigrades. 



Leydig has proposed an arrangement of his owu, which is preferable 

 to either of the above. 



Ciliocriutacea. 



Animals with a jointed body and a ciliary apparatus at the cephalic 

 extremity. The nervous system consisting of a cerebral ganglion, and 

 filaments radiating from it. Digestive and respiratory systems much 

 developed. No heart or blood-vessels. Sexes separate. The female 

 produces ' Bummer' and ' winter-ova.' Many undergoing meta- 

 morphosis. 



A. Figure between clavate and cylindrical. 



I. With elongated transversely-ringed attached Foot 



1. Floicularia proboscidea, Ehrenberg; P. ornata, Ehr. ; P. 



appendiculala, n. -. 



2. Stephanoceros Eichhornii, Ehr. ; S. glacialit, Perty. 



3. (Eciitei cryitallincu, Ehr. 



4. Conochilut volvox, Ehr. 



5. Lac'mnlaria socialis, Ehr. 



6. Limnia* ceratophylli, Schrank. 



7. Tubicolaria najai, Ehr. 



8. Melicerta ringens, Schrank. 



II. With elongated jointed Foot, retractile, like a telescope. 



1. Callidina elegant, Ehr.; var. C. rotea, Perty; C. comuta, 



Perty. 



2. Hydrias comigera, Ehr. 



3. Typhlina viridis, Ehr. 



4. Rotifer vulgaris, R. citrinut, R. erythrasus, R. 



R, tardus, Ehr. 



5. Actinurut nepluniui, Ehr. 



6. Afonolabis conica, Ehr. 



7. Philodina erythrophthalma, P. roseola, P. macroilyla, P 



citrina, P. aculeata, P. megalatroclia, Ehr. 



III. With elongated jointed non-retractile Foot. 



1. Scandium longicaudum, Ehr. 



2. Dinocharit Pocillum, D. tetractis, D. paupera, Ehr. 



IV. With a short Foot and long Pedal Forceps. 



1. Notommata ( ?), N. tigrit, N. longiietce, Ehr. 



2. Sfonocerca rattus, M. bicornit, M. valga, Ehr. 



3. Purcularia gibba, F. Porficula, P. gracilis, Ehr. 



4. Microdon clavtu, Ehr. 



V. With short Foot and Pedal Forceps, which aiv of equal length with 



or somewhat shorter or longer than the Foot. 



1. Hydatina senta, If. brachydactyla, Ehr. 



2. Pleurotrocha glbba, P. conatricta, P. leptura, Ehr. 



3. Furcularia Rheinhartii, Ehr. (probably not a Furcularia, 



but a Notommala). 



4. Notommata tuba, N. petromyzon, N. saccigera, N. copeus, 



N. centrum, N. brachyota, N. collaris, N. najas, N. awrita, 

 N. gibba, N. ausata, N. decipiens, N. felts, N. parasita, 

 N. tripus, Ehr. ; If. tardigrada, u. sp. ; JV. vermicularis, 

 Buj. ; N. roseola,, N. onisciformis, Perty. 



5. Lindia torulosa, Duj. 



6. Synchceta pcctinata, S. baltica, S. oblonga, S. tremula, Ehr. 



7. Diglena grandis, D. forcipata, D. aurila, D. catelina, D. 



conara, D. capitata, D. cawdata, Ehr. 



8. Rattalus Innaris, Ehr. 



9. Diatemma forjicula, D. setigerum, D. marinum, D. ford- 



patum, Ehr. 



10. Triophthalmus dorsalis, Ehr. 



11. Eoipora najas, E. diyitata, E. elongata, Ehr. 



12. Cyclogena lupus, C. elegans, Ehr. 



13. Theorus vernalis, T. uncinatus, Ehr. 



Note. Ehreuberg's genus, Enteroplea hydatina, is the male of 

 Hydatina senta ; and his Notommata granularis stands iu the same 

 relation to Notommata brackionus, which latter genus however is placed 

 Far more correctly under the genus Brachionus than under Notommata. 

 Diglena granularis, Weisse, lastly, is the male of D. catellina, Ehr. 



VI. Without Foot. 



1. Albertia. 



Includes the A. vermiculus, found by Dujardin in the abdominal 

 cavity of the Earthworm, and in the iuteatiue of the Limacina ; and 

 A. crystallina, discovered by Schultze in the intestine of Nais littoralis. 



li. Figure sdfcciform. 



I. Foot short. 



1. Notommata clavalata, N. myrmdeo, N. syrinx, Ehr. 



2. Diylena lacustris, Ehr. 



II. Foot absent. 



1. Notommata A nglica, Dalryrnple ; If. Sieboldii, n. sp. 



2. Polyarthra platyptera, Ehr. 



3. Triarthra longweta, T. mystacina, Ehr. 



4. Ascomorpha, hdoetica, Perty; A. Germanica, u. sp. 



C. Figure compressed, 

 o. Depressed from above downwards. 



I. With a foot. 



1. Euchlanis triquetra, E. ffornemanni, E. luna, E. macrura, 



E. dilatata, E. Lynceut, Ehr. ; E. emiselaia, n. sp. ; E. 

 bicarinata, n. sp. ' (E. bicarinata, Perty, I consider a 

 Salpina.) 



2. Lepadella ovalis, L. emarginata, L. salpina, Ehr. 



3. Monostyla cornuta, M. quadridentata, M. Innaris, M. 



carinata, Ehr. 



4. Metopidia lepadella, M. acuminata, M. triptera, Ehr. 



5. Slephanops lamellaris, S. muticus, S. cirratus, Ehr. (Du- 



jardiu declares that S. muticus is LepadMa ovalis.) 



6. Squamella bractea, S. oblonga, Ehr. 



7. Notogonia Ehrenliergii, Perty. 



8. Noteus quadricornis, Ehr. 



9. Brachionus pala, B. amphiceros, B. urceolaris, B. rubeus, 



B. Miilleri, B. brevispinus, B. BakeH, B. polyacanthus, 

 B. militaris, Ehr. 



1 0. Pterodina patina, P. ettiptica, P. clypeata, Ehr. 



II. Foot absent. 



1. Anurea quadridentata, A squamula, A. falculala, A. curvi- 

 cornis, A. biremie, A. striata, A. incrmis, A. acuminata, 

 A. foliacea, A. stipitata, A. testudo, A. serrulata, A. 

 aculeata, A. valga, Ehr. 



A Laterally compressed. 



1. Salpina mucronata, S. spinigera, S. iicnlralis, S. redunca, 



S. brevispina, S. bicarinata, Ehr. 



2. Mastigocerca carinata, Ehr. 



3. Afonura colurus, M. dulcis, Ehr. 



4. Colurus uncinatus, 0. bicuspidatus, C. caudatus, 0. dejlexus, 



Ehr. 



(Leeuwenhoek, Philosophical Transactions, 1701-4; Baker, Employ- 

 ment of the Microscope, 1753 ; Bory St. Vincent, Dictionnaire Classique 

 tf Hiitoire Naturelle, art. Rotiferei, 1824; Ehrenberg, Infusionsthicrchen, 

 1838; Pritchard, Infusorial Animalcules; Doyere, Memoire aur les 

 Tardigrades, in Ann. des Sc. Nat., 1842; Owen, Lectures on Compara- 

 tive Anatomy, 1843 ; Grant, Outlines of Comparative Anatomy, 1843 ; 

 T. Rymer Jones, A General Outline of the Animal Kingdom, 1841; 

 Dujardin, Histoire Naturelle des Zoophytes Infasoires, 1843; Mantell, 

 Thoughts on Animalcules, 1846; Lankester, Cydopcedia of Anatomy 

 and Physiology, art. Rotifera, 1848; Dalrymple, Description of 

 an I'tifusory Animalcule allied to the Genus Notommata of Ehrenberg, 

 hitherto undcscriued, 1849; Brightwell, On a Dioecious Rotifer, iu 



