390 THE SECRETAE.T ON ADDITIONS TO THE MENAGERIE. [May 1, 



have a nacreous appearance on account of the thickness of their 

 muscular Avails. These sacs end blindly and are not, as I at first 

 thought them, the dilated ends of the muscular duct of the sperini- 

 ducal glands. They occupy two or three segments and open on to 

 the exterior in the xviiith segment through the penes. Their 

 walls are excessively thick and the lumen therefore is not wide. 

 The penis on to which each of them opens is a portion of the body- 

 wall which projects ; it does not appear to be simply the everted 

 portion of the sacs. The extremity of the organ is vascular and 

 has a wide lumen ; but where it traverses the body-wall the lumen 

 of the bursa is narrow. The two sperm-ducts become united just 

 where they dip into the thickness of the walls of the bursa ; they 

 are ciliated on their passage through the bursa and open into its 

 interior. The spermiducal glands have the structure which has 

 been referred to in the definition of the genus. One pair of them 

 opens into the bursa near to, but quite independently of, the 

 oriiice of the sperm-ducts ; the other opens in front of this on to 

 the xviith segment. The accompanying diagram (woodcut, fig. 3) 

 shows the relations of the different parts ol' the male efferent 

 apparatus. The ovaries and oviducts are in the usual places for 

 these organs to occupy. There is a single pan* of spermathecae in 

 the viith segment ; they are long and tubular without a diver- 

 ticulum. The very extremity of the pouch differs from the rest 

 in that its walls are very thin ; this is brought about by the 

 absence or very slight development of the muscular layers and the 

 thinness of the epithelium. Elsewhere the epithelium is tall and 

 folded. The pouch was filled with spermatozoa, arranged in a 

 peculiar fashion. The heads of the spermatozoa were attached to 

 the cells lining the pouch and presented quite a regular appearance, 

 so much so that they might easily be mistaken for cilia. 



May 1, 1894. 

 Dr. A. GuNTHER, F.E.S., Vice-President, in the Chair. 



The Secretary read the following report on the additions to the 

 Society's Menagerie during the month of April 1894 : — 



The total number of registered additions to the Society's Mena- 

 gerie during the month of April was 160, of which 87 Avere by 

 presentation, 6 by birth, 49 hy purchase, 2 received in exchange, 

 and 16 on deposit. The total number of departures during the 

 same period, by death and removals, was 83. 



Amongst these I wish to call particular attention to the collection 

 of Mammals and Eeptiles sent to us by Dr. J. Anderson, F.R.S., 

 being the proceeds of his recent expedition to Egypt and Suakim. 



