10 The Microscope. 



surroundings, or perhaps, as suggested by Saville Kent, " a 

 phase preliminary to its entire withdrawal, and antecedent to 

 the entrance of the animalcule upon the enc} r sted cr resting 

 state." Trachelomonas volvocina, Ehr., is not known to become 

 encysted, propagating itself by subdivision into monadiform 

 germs ; yet I have seen it with a bulbous llagellum. 



But the accident to Ileonema is a trivial one so far as any 

 apparent discemfort is concerned, and indeed the entire llagel- 

 lum is sometimes lost by adhesion and rupture after the distal 

 portion is gone. This separation of either part occasionally fol- 

 lows contact with a mass of dirt or bit of alga; so the glass is 

 not always the sole cause. 



The loricated collar-monads, whose symmetrical forms 

 " snatch a grace beyond the reach of art," are not exempt from 

 the '"darts and slings of an outrageous fortune " thai batters 

 their sheaths, and worsts them in the fray. These minute 

 creatures, whose homes are ciwstalline Portland vases, Egyptian 

 tear-bottles, and transparent amphorae from whose delicate lips 

 Queen Mab herself might feel it a privilege to drink, even these 

 comely atomies do not always succeed in perfecting their pro- 

 tective coverings. In Fig. 5 is shown the perfect lorica and en- 

 closed zooid of Salpingcesa fusiformis, S. K., an abundant spe- 



Fig. 5. Fig. 6. Fig. 7. Fig, 8. Fig. 9. Fig. 10. 



cies; while in Figs. 6 and 7 are delineated the empty loricas of 

 the same species malformed to a remarkable extent. The for- 

 mer (Fig. G) was observed on a leaflet of Myriophyllum, and 

 was then alive and well in its misshapen home; the latter (Fig. 

 7) was attached to a diatom, and both were dead and empty 

 when found. By what freak or by what unknown exigency the 

 characteristic contour was abandoned and these unsymmetri- 

 cal, hunchbacked loricae secreted, it is difficult to conjecture. 

 And not much easier is it to guess how the zooids within the 



