244 Mr. H.J. Carter on the Organization of Infusoria. 



young inilivi(liinls) ; (c) particles of food ; [d) su])crminierary 

 scalos ; (>/') form of scale. Average length of full grown test 

 l-JdOth of an inch. 



Ditto, with body transformed into an ovisac filled with ovules. 

 Ovule about l-4()()0th of an inch in diameter. 

 Ditto, presenting a development of delicate granuliferous cells like 

 those of Amwbn radiosa. Cells about l-400()th of an inch in 

 diameter: (a) capsule of nucleus which generally remains entire. 

 Ditto, sliowing that the ovules are devel()i)ed outside the capsule 

 of the nucleus : («) opercular closure of tlie test accompanying 

 tliese developments. 



Ditto, showing a separation and development of the granules into 

 moveable bodies (spermatoz lids?) wi////w the test: (a) group of 

 cells entire on their ])assage outwards. This and the last figure 

 also show the dcvelo])ment of the ovides and granuliferous cells 

 in the neighl)ourhood of the nucleus and its capsule, and the 

 latter apparently growing out of the nucleus. 



Fig. 30. Ditto, showing ovules and granuliferous cells developed in the 

 same test, and together : («) supernumerary scales. 



Fig. 31. Ovule oi Euglypha alveolota more magnified : (o) showing capsule 

 and nuclear portion ; (6) ditto with pellucid area and central gra- 

 nule; (c) bearing granules. Do these granules indicate an ap- 

 proaching develoj)ment of the sarcode, or are they adventitious? 

 They do not ajipear in the early state of the ovule, but generally 

 before it has left the test, wherein granidcs like those dcvelojied 

 from the granuliferous cells are frequently seen oscillating round 

 them, {d) development of external layer or diaphaue, now giving 

 the ovule a rhizopodous form. 31'. Granuliferous cell more mag- 

 nified ; in this state it progresses under a jtlane, actinophorous 

 form, or the granules become large, separate, and exhibit much 

 activity within the test. 



Fig. 32. Eughjpha alveolata (large variety?), 1 -300th of an inch in length, 

 showing a special ap])aratus for the development of the granu- 

 liferous cells : (a) animal (?) transformed into a secondary test; 

 {b) cyst containing granuliferous cells ; (c) tube for their libe- 

 ration when they have become locomotive. The same is seen in 

 the common or smaller variety. 



Fig. 33. Ditto, ditto, with the granules separated and endowed with active 

 locomotive power : (B) shows the structure of the test of E. al- 

 veolata. 



Fig. 34. Eughjpha alveolata in conjunction ; the granules of each passing 

 freely backwards and forwards into each other's tests, as if the 

 two bodies had been two drops of water thus united. The union 

 however is only a])parent, as we see in the sej)aration of Arcdla 

 vulgaris, which also exhibits a similar conjunction both still and 

 under reptation. 



Fig. 35. Ditto, ditto, separating : (a) the bond of union reduced to a mere 

 thread. 



Fig. 36. Ditto, separation of the fleshy substance completed, tests still 

 united : (a) nucleus in its capsule. 



Plate VI. 



Fig. 37. Globular sac of seed-like body of Spongilla, partly filled with 

 ovules and gianules, of different sizes. 



