1895.] MB. F. E. BEDD/VBB ON NEW EAETHWORMS. 231 



situated on a conspicuous papilla ; the end of the spermiducal 

 gland appeared to be protruded, thus forming a second " papilla " 

 of smaller size upon the first. 



The two orifices are near together. 



The internal characters of this Microscolex serve in great part to 

 differentiate it from its allies, among which Microscolex loncjiseta 

 is the nearest. The first septum divides segments iv.-v. ; septa 

 ix.-xii. are thickened. There is a moderately sized gizzard in 

 segment v. The intestine seems to begin in xvii., but in longi- 

 tudinal sections I cannot draw a line between it and the oesophagus. 

 The latter is straight until the end of xi. ; afterwards it is con- 

 stricted by the septa. The sperm-sacs are in segment xi., as is so 

 generally the case with the worms of this genus. The testes and 

 funnels are in x. There is also a pair of sperm-sacs in ix., attached 

 to the posterior wall of that segment and racemose, though con- 

 taining little or no sperm. 



The single pair of spermathecae are in segment ix. Each is 

 an oval pouch with a diverticulum as long as itself ; the diverti- 

 culum is coiled in a spiral and ends in a swollen extremity. This 

 is lined with a much-folded epithelium, so that the lumen appears 

 to be divided by numerous radiatiug partitions. 



The most remarkable feature in the internal organization of the 

 worm concerns the spermiducal glands. These are very long 

 and of the usual tubular form. The entire efferent apparatus 

 extends back to the xxviith segment, thus occupying ten segments. 

 It measured 8 mm. in length. The spermiducal gland, however, 

 did not reach so far back ; but the muscular sac containing the 

 penial setae passed beyond the end of the spermiducal gland. The 

 latter is coiled slightly upon itself once or twice; it opens on 

 to the exterior by a moderately short and narrow muscular 

 duct. The sac containing the penial setse contained two of them, 

 which wei'e of such different lengths that ohe might speak of a 

 dimorphism in the setae. One measured the full 8 mm., the other 

 was not half its length. They were alike, however, in their form 

 being without ornamentation at the free end. The sac contained 

 an immature seta of a pale colour contrasting with the bright 

 yellow of the mature seta, which was much longer than the smaller 

 of the mature setae. The base of implantation of these penial setae 

 was supplied with abundant blood-capillaries. The penial setae, 

 the single sperm-duct, and the spermiducal gland open separately 

 on to the exterior, though near together. 



(4) Microscolex michaelseni, n. sp. 



This is one of the most abundant species of Earthworms among 

 the w"orms collected by Dr. Michaelsen. I have great pleasure in 

 associating it with his name as a mark of my respect for the 

 valuable work which he has done in this department of natural 

 history. 



The present species is a very well-marked form, and it is a 

 matter of surprise to me that it has never yet been described from 



