STUDIES ON EARTHWOKMS. 567 



nephridia in the anterior somites, the first nephridium being 

 apparently in somite xiv, so that both these approach the 

 Limicolae in having no nephridia in those somites in which the 

 spermathecaj and ciliated rosettes lie, though they are present 

 in the same somites with the oviduct and the posterior part of 

 the sperm-duct. 



The Genital Organs. — I have succeeded in finding all the 

 usual organs connected with the genital apparatus, with the 

 exception of spermathecse. The seminal reservoirs or sperm 

 sacs are constructed on the plan of AUolobophora, and not 

 on that of Lumbricus, as Orley seems to indicate, since there 

 is no median portion connecting the sacs below the intestine 

 (fig. ]5). The worms which I dissected are sexually mature, 

 one of them having spermatophores attached to somite xiv. 

 There are four pairs of pouches, as in AUolobophora,^ one 

 on each side of each of the somites ix, x, xi, and xii ; they vary 

 in size in these somites, and in different individuals. Each is 

 an irregular loose mass, which is easily torn on opening the 

 worm, and in sections the lobation is seen to be carried to a 

 great extent, the cavity of the sac being subdivided by long, 

 narrow inpushings of the wall of the sac, whilst loose separate 

 masses of developing spermatozoa are seen in the somites in 

 which the reservoirs lie. Those in somites ix and x are formed 

 as anteriorly directed saclike outpushings of the hinder septa 

 of these somites, whilst those in somites xi and xii are pos- 

 terior outgrowths of the anterior septa of these somites. Each 

 is connected to a septum by a short pedicle (PI. XXXVIII, 

 fig. 15, e^ to e^). 



The testes (which Orley states lie in somites xi and xii) 

 are in reality in somites x and xi, attached to the anterior 

 septa, very close to the ventral body wall, near the nerve cord 

 (fig. 15, a). They have a digitate form, like the testis of 

 Allolobophora turgida, figured by Bergh." (PI. XXXVIII, 

 fig. 16). Owing to their deep position they are very difficult to 



1 R. S. Bergh, " Untersucli. iiberd. Bau u. d. Entwickl. d. Gesclilectsorgane 

 d. E-egenwiirmer," 'Zeit. fiir wiss. Zool./ 18SG, p. 303. 

 ' Ibid., fig. 1. 



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