ALG^EANIMALCULA. 133 



tion. The remainder of the Algae may be carried home in 

 tubes or bottles, and upon arrival should be emptied into 

 small aquaria formed of wide-mouthed bottles or small 

 propagating glasses turned upwards, the knob resting in a 

 hollow support. Whether 

 minute or not, the gatherings 

 should be examined on the 

 spot with a platyscopic lens, 

 to prevent the loading of one's 

 satchel with useless speci- 

 mens. 



Marine Algae furnish many 

 beautiful objects for the 

 microscope, and can be easily 



collected upon many shores. 



' FIG. 119. 



Perhaps of all places, Tenby, 



Torquay, and the Mumbles near Swansea are the best 

 hunting grounds. The various species of Cladophora, 

 Ptilota, Dasya, Bangia, Ceramium, and Griffithsia all form 

 good objects. 



Books which may be consulted: Rabenhorst's ' Flora 

 Europaea Algarum ' ; Griffiths and Henfrey's ' Micro- 

 graphic Dictionary ' ; Johnstone and Croall's ' British Sea- 

 Weeds ' ; Hassall's ' Fresh-Water Algae/ 



ANIMALCULES. Taking this term to apply to the 

 Infusoria and Rotatoria the student will find a good field 

 for study. It is scarcely possible to find a drop of water 

 which has been for any length of time exposed to the 

 air, not containing either Infusoria or Rotatoria. In some 

 waters they are found in but few numbers, while other 

 localities literally swarm with them. In the former case 

 the pond-filter shown at Fig. 116 will be found valuable. 

 The organisms may be taken from the pond or stream by 

 means of the stick and bottle, and after straining, the 

 residual water carried home in the cork tubes or bottle 



