1892.] 



THE MICEOSCOPE. 



139 



46. How 77iay picttwes be transferred to wood by 77iea7is of 

 77iethylated spirits^ or so77ie sitc/i 77iethod? 



The following is recommended : boak the print in a saturated 

 solution of stick potash in alcohol. Apply the print with a roller 

 to secure g-ood contact : the softened ink will be transferred to 

 the wood surface. 



47. What 772ethod ca7i be used for prepariTig teeth of flies? 

 Teeth of flies refer to the rasps found on the bulbous extremity 



of the proboscis of the fly. These rasps have the appearance of 

 closed spirals, but careful examination shows them to be split 

 open, forming sharp, rasping teeth, operated by muscular action. 

 Any mount of proboscis of fly should show them, but a mount in 

 Farrant's solution is best for details. 



NCV/S TRP/A 

 THE NVORKERS 



The Mobile Deposits. — Dr. D. B. Ward has identified about 

 c;o species of diatoms in the Mobile earth, a list of which may be 

 found in the Journal for June. 



The matron of the Mobile Protestant Orphan Asylum, Mobile, 

 Ala., has about 50 vials of washed diatoms for distribution. The 

 washinof. ^vhich is verv laborious, was done bv the bovs under 

 direction of Dr. Taylor. We understand that any person de- 

 siring a vial can address the matron, sending such contribution to 

 the funds of the asylum as he deems the material to be worth to 

 him. We suggest that a dollar is not too much to enclose. 



New Desmids. — Mr. W. N. Hastings has described the fol- 

 lowing new desmids in the American Monthly Microscopi- 

 CAL Journal for June. 



EXPLANATION OF THE PLATE. 



Fig. la. Euastrum magnificum variety 

 crassioides, var. nov. Wolle, x 

 500. 



Fig. lb. Same, side view, x 500. 



Fig. ic. Same, end view, x 500. 



Fig. 2a. Xanthidium truncatum, spec, 

 nov. Hastings. Front view, x 500. 



Fig. 2^. Same, side view, x 500. 



Fig. 'i.e. Same, end view, x 500. 



Fig. 3. Staurastnim megalonotum, Nord. 



var. Obtusiim, var. nov. Wolle. 



Front view, x 500. 

 Fig. 4. Closterium robustum, spec. nov. 



Hastings, x 250. 

 FiG. 5. Closterium maculatum, spec. nov. 



Hastings, x 500. 

 Fig. 6. Closterium lineatum, variety costa- 



tum, var. nov. Wolle, x 250. 

 Fig. 7. Closterim angnstatum Kg. variety 



clavatum var. nov. Hastings. 



