CHINESE EARTHWORMS GATES 473 



Remarks. — Stalked glands or glandular masses in connection with 

 the presetal genital markings were not found. 



No setae were observed on the median wall of the male parietal 

 invagination but unusually small or very deeply retracted setae may 

 have been overlooked. 



P. praepinguis is close to P. tschiliensis from which it may be dis- 

 tinguished at present by the location of the primary spermathecal 

 pores in parietal invaginations. 



Chen (1936, p. 302) maintains that praepinguis is a synonym of 

 tschiliensis and that the type of the former is not only "perfectly 

 identical" with some of Chen's earlier specimens from Szechwan but 

 also with the types of grahami. P. grahami is quite clearly distin- 

 quished from praepinguis by the unusual spermathecal chambers 

 and the presence of copulatory chambers. What Chen's earlier 

 specimens from Szechwan actually are cannot be determined from 

 his description. P. praepinguis is, as was stated above, close to 

 tschiliensis and, of course, cannot be satisfactorily characterized 

 from a single specimen. The spermathecal pores of one species are 

 superficial but in the other species are within definite, or what appear 

 to be definite, parietal invaginations with large transversely slitlike 

 apertures, which would normally be shut so as to conceal the pri- 

 mary pore from sight externally. Such an invagination appears to 

 be of sufficient importance to distinguish praepinguis from tschilien- 

 sis^ in view of the lack of intraspecific variation with regard to the 

 spermathecal pore. If the two forms are really specifically distinct, 

 examination of additional specimens of each should disclose further 

 distinguishing characteristics. 



PHERETIMA ROBUSTA (E. Perrier) 



1872. Pen'cJiaeta robusta E. Perrier, Nouv. Arch. Mus. Hist. Nat. Paris, vol. 8, 

 p. 112 (no type designation ; types from Mauritius and Manila in the 

 Paris Museum). 



1899. Aniyntas lohri Michaexsen, Mitt. Naturhist. Hamburg, vol. 16, p. 12 

 (type locality: Shi-hui-yao near Wuchang, Hupei; types in the Hamburg 

 Museum). 



1931. Pheretima siemsseni (part) + P. fokiensis + P. roiusta Michaelsen, 

 Zool. Jahrb. (Abt. Syst), vol. 61, pp. 571, 574, 577 (type locality of 

 siemsseni: Foocliow; of foJaensis: Fukien Province; types in the Ham- 

 burg Museum). 



1931. Pheretima (Ph.) hesperidum, (part, excluding all except lohri) + P. 

 siemsseni (part) -f P. fokiensis + P. rohusta Michaelsen, Peking Nat. 

 Hist. Bull., vol. 5, pt. 3, pp. 2, 17, 19, 21. 



1931. Pheretima (Ph.) corrugata Chen, Contr. Biol. Lab. Sci. Soc. China, zool. 



ser., vol. 7, p. 131 (type locality: Kia-ting, Szechwan; types in the 

 Museum of the Science Society of China). 



1932. Pheretima {Pheretima) lanta Ude, Archiv fiir Naturg., new ser., vol. 1, 



p. 153 (Foochow; specimen in the Hamburg Museum). 



