1892.] NEW SPECIES OF EARTHWORMS. 141 



spheres, and younger stages in the development of spermatozoa, 

 though their position in this somite is rather diffcult to explain, except 

 on the idea that the septa, here delicate, may have become ruptured 

 or displaced in dissection. But Perrier was a very careful dissector, 

 and he had had great experience in the dissection of Earthworms, 

 so that it is scarcely justifiable to suggest a mistake in the matter. 



In P. perrieri there are four pairs of spermathecse lying in somites 

 vi. to ix. ; each is an ovoid sac, without any distinct neck or duct and 

 without a diverticulum (Plate VII. fig. 3, spth.). Each sac opens 

 at the anterior margin of its somite — practically intersegmentally — 

 in a line with the second chgetae. 



[In P. lieteroporus there are five pairs, the additional pair being 

 in somite v. ; each sac has a diverticulum.] 



1 may add that in the genus Perichdeta we find species with and 

 species without diverticula to the spermathecse. 



In the alimentary tract the position of the gizzard is to be noted ; 

 it lies, as seen in sections, entirely in somite v., though its hinder 

 extremity is carried back to the level of somite ix. (Plate VII. 

 fig. 3, giz.). 



The following region of the gut, as far back as somite xvi., has 

 very vascular walls, which are considerably folded (Plate VII. fig. 3). 

 But there are no definite " pouches " or diverticula, though the 

 general structure recalls that of calciferous glands ; and I find in the 

 hinder somites crystalline bodies, resembling those of carbonate of 

 lime present in the glands of Lumbricus, but there is no effervescence 

 on the application of acetic acid. This vascular region of the gut is 

 not so extensive as it appears on paper, for the cavities of somites 

 vi., vii., viii. are exceedingly short, the septa being almost in contact 

 centrally. 



The thin-walled intestine commences in somite xvii. or xviii. and 

 is very wide, occupying a considerable extent of the body-cavity ; 

 there is no typhlosole (Plate VII. fig. 4). 



[In P. heteroporus the gizzard is in somite vii. ; there are three 

 pairs of reniform diverticula, with short ducts, in somites x., xi., xii.] 



B. MlCROCH^TA PAPILLATA, U. Sp. 



We are acquainted with only two species^ of this genus, which 

 was instituted by Beddard^ for a worm origuially described by Eapp 

 under the name of " Lumbricus niicrocli(BtaJ' collected in Cape 

 Colony. Mr. Beddard named the species M. rappi, and it received 

 a description at my hands ^ almost simultaneously with that 

 published by him. I described the second species, from Natal, 

 under the name of M. beddardi *. In a recent paper' I have pointed 



^ After the MS. of this paper had left my bauds, I received from Dr. D. 

 Rosa a copy of his memoir, "Die exotischen Terricolen des k. k. Naturhis- 

 torischen Hof museums," published in the 'Annaleu d. k,-k. Nat. Hofmuseums,' 

 Wien, 1891, Bd. vi. Heft. 3 & 4. Herein he describes a third species, 

 M. benhami. 



- Trans. Zool. See. xii. 1886, p. 63. 



3 Q. J. M. Sc. vol. xxvi. p. 267. 



* Ibid, xxvii. p. 77. 



^ "An Attempt to Classify Earthvrorms," ibid. xxxi. p. 215. 



