ON PAKAWRIGHTA UOBUSTA. 201 



and have already been sufficiently explained. Fig. 6, and Plate 

 XXXIV, fig. 8 {8, 9, 10), represent capsules which frequently 

 occur in the male gonophore, and they will be mentioned below. 



In text-fig. 5 (<^) are seen two central bodies, 1'3/x and 

 0"6 |i( in lengthj which have clearly been formed by fission. 

 The outermost layei* (o. c.) of the capsule is about 3"9 fi in 

 thickness, it is apparently veiy compact and dense, and the 

 lamination, if visible at all, is very close. On the inner side 

 of this dense envelope are two thin layers separated by a 

 narrow clear space (o. c. I.). The outer capsule and these two 

 thin layers stain more intensely than any other part of the 

 capsule. Passing inwards we find concentric layers arranged 

 with great regulai-ity, often there are alternating layers of 

 sharply and less sharply defined strata. In these layers and 

 between them can be seen refringent bodies irregularly 

 placed. They may be clustered on one side of the capsule 

 only (PI. XXXIV, figs. 9, 10, 11, s. h.). They vary in size 

 from about I'l n to about 0"4ju, and were presumably formed 

 by the division of the central body. The layers of capsule 

 immediately surrounding the central body or bodies are less 

 pellucid than the others (PI. XXXIV, figs. 10 and 11,*. /.). 



In fig. 9 there are four central bodies, obviously formed by 

 the division of two. The capsule shows the usual outer com- 

 pact layer with little trace of lamination, then the sharply 

 defined double line. Within this there are twelve or thirteen 

 closely applied layers [m. c), following which are two 

 sharply defined layers, and then a considerable number of 

 thick layers {s. d.), each consisting of two or three faintly 

 defined layers (/. d.). 



In fig. 10 the central body has broken up into a cluster of 

 smaller bodies, and it is supposed that it is in such a way 

 that the bodies {s. h.) scattered through the substance of the 

 capsule originate. Most of the bodies of the cluster appear 

 to become included in the new laminations, while one or more 

 remain as central bodies producing fresh laminations. 



In fig. 11 the central bodies, of which there were clearly six, 

 have each broken up into clusters of small bodies. 



