MARINE INFUSORIA. 108 



of +he gei)U9 Follicularia are almost exclusively marine, I have for some 

 time besn familiar with a fresh-water type, discovered in the neighbour- 

 hood of Stourbridge, by Mr. Thomas Bolton, upon which I have 

 conferred the title of Follicularia [Frela) Boltonii. 



7. — Hemiophrya (Podophrya) gemmipara, Hertwig, (Plate IV., Figs. 

 10 and 11.) — This and the type next referred to belongs to that remarkable 

 group of the infusoria known by the title of the Suctoria or Tentaculifera, 

 typified by the genus Acineta, and distinguished bj the possession of 

 tubular tentacle-like appendages, each of which usually terminates in a 

 sucker-like and slightly expaudel disc. With these suctorial organs 

 other animalcules are seized, and their protoplasmic contents sucked 

 out and transferred to their own bodies. Many of these Acinetidse 

 during a considerable part of their existence lead an endoparasitic life 

 within the body substance of larger Ciliate Infusoria, such as Vorticella 

 and Paramecium, a circumstance which led Stein to infer that the 

 Acinetidse were not independent organisms, but developmental phases 

 of their selected husts. Tim hypothesis, however, is now entirely 

 abandoned, and Adnata and its allies recognised as representing an 

 entirely independent, extensive, and highly interesting Protozoic group. 

 Hemiophrya gemmipara was first described by Dr. Hertwig in the year 

 1875, " Morphologisches Jahrbuch," Band I.,) as a species of Podoplirya, 

 and has been adopted as the type of an independent genus by mysel', 

 ("Mmualof the Infusoria," now going to press,) with reference to the 

 peculiar character of the tentacular appendages first pointed out by its 

 discoverer, and frequently confirms .1 by my own personal observation. 

 These append iges are, in fact, of two sorts, consisting partly of the ordinary 

 tubular and suctorial organs, and partly of noa-tubular one3, which are 

 eimply prehensile, thu3 resembling pseudopodia, and which, extending 

 peripherally to a considerable distance, ssize and bring food material 

 within reach of the suckers. The specific name of gemmipara has been 

 conferred by Hertwig on this type with relation to its conspicuous, 

 gemmiparous mode of reproduction. Large bud-like processes, varying 

 from one or two to as many as six or eight in number, are developed at 

 the distal extremity of the body ; within each of these a diverticulum of 

 the branching endoplast or nucleus is produced, and the entire bud or buds 

 are ultimately constricted off and set free in the form of free-swimming 

 ciliated embryos. Examples of this interesting type were encountered 

 In the polypidoms of Buyula, Crisia, and other Polyzoa obtained from 

 various depths, and with the aid of osmic acid specimens were success- 

 fully mounted exhibiting the tentacles in a condition of full expansion, 

 as also with the characteristic embryos attached. 



8. — Ophryodendron pedicellatum, Hincks, (Plate IV., Figs. 12 to 14.) — 

 This singular form, figured and described at length by the Rev. Thomas 

 Hincks in the " Quarterly Journal of Microscop cal Science" for January, 

 1873, and obtain jd by him at Ilfracombe, North Devon, was sparingly 

 encountered, andon one occasion only, attached to a species of Plumularia, 

 brought up with the deeper dredginga. In their normal condition the 



