524 ■ Transactions of the Society. 



C. Eggs Unknown. 

 M. crassidens sp. n., plate XVIII. figs. 9a to 9c. 



Sjjccijic Characters. — Small, hyaline. Teeth strongly bent in 

 middle. Pharynx witli two free nuts in each row, besides large 

 nut at end of gullet, and large comma ; nuts very short and broad, 

 often as broad as, or broader than, long. Claws very slender, each 

 pair united more than half way. 



Length 250 /i. No eyes. Stomach walls of few large cells, 

 only about 6 visible in one view. No supplementary points could 

 be seen on the longer claws. 



Tliis appears to be the African representative of M. intermedins 

 Plate (7), as more fully described by Professor Eichters (10). 

 Compared with examples of that species sent to me by Professor 

 Eichters, 31. crassidens has broader teeth, and more slender claws, 

 united for a greater proportion of their length. 



No eggs were found. 



The first nut in the pharynx is unusually large, and seems to 

 be more closely united to the gullet than in most species. It 

 gives the end of the gullet the appearance of being expanded into 

 a funnel. Similar expanded cuneate processes at the end of the 

 gullet are found in several species not at all closely related to 

 M. crassidens, as M. coronifer, M. granulatus, and M. zetlandicus. 



Cape Colony. Fairly abundant. 



Literature. 



1. DoYERE — Ann. d. Sci.Nat., ser. 2, xiv., 1840. 



2. Ehrenberg — Mikrogeologie, 1854. Atlas, plate 35b. 



3. Murray, J. — Tardigrada of the Scottish Lochs. Trans. Eoy. Soc. 



Edin. xli. (1905) pp. 677-98. 



4. „ Tardigrada of the South Orkneys. Op. cit., xlv. (1906) 



pp. 3-23-84. 



5. „ Scottish Tardigrada. Op. cit., 1907. 



6. „ Arctic Tardigrada. Loc. cit. 



7. Plate, L. H. — Naturceschichte der Tardigi-aden. Zool. Jahrb., iii. 



Morph. Abt., 1888, pp. 487-550. 



8. Eichters, F. — Fauna der Umgebung von Frankfurt-a-M. Ber. 



Senckenbg. Natf. Ges., 1902, pp. 8-14. 



9. „ Nordische Tardigraden. Zool. Anz., xxvii. (1908) pp. 



168-72. 



10. „ Arktische Tardigraden. Faima Arctica, iii. (1904) pp. 



495-508. 



11. Verbreitung der Tardigraden. Zool. Anz. xviii. (1904) 



p. 847. 



12. „ Islandische Tardigraden. Tom. cit., p. 3^8. 



18. Schultze, C. a. S.—MacroMotus hufelandi. Okens Isis, 1884, p. 708. 



