AT THE MICROSCOPE. 41 



Prof. Grunow, I should perhaps be the more disposed to prefer 

 that the better name should stand, but it cannot be. The ques- 

 tion win not be without interest to many of our members, and 

 will be found in volumes of the British Association Reports, 

 which, doubtless, they will be able to consult. 



TuFFEN West. 



EXPLANATION OF PLATE YL 



Fig. 1. — Rostrum of Mr. Nicholson's Tick from New Forest. 



,, 2. — Rostrum of " Dog-Tick," Ixodes Rkimis, from specimen lent 

 by H. E, Freeman: — m.m., mandibles (?) ; L, labium (?). 

 The latter specimen has been greatly injured, evidently by 

 forcible removal from the animal on which it was found. 



,, 3. — Antenna-like " Palp," from the Forest specimen, left side, 

 seen on its under-surface. 



4. — The same part from the Dog-Tick. The extreme thickness of 

 the bony integument will be noticed ; it is finely laminated 

 like a lobster's claw. There are also channels through its 

 thickness for enabling nerves to communicate with the sur- 

 face ; an appearance frequently met with in the horny integu- 

 ments of the Insecta. 



5. — Foot of " Tortoise Tick," drawn from a living specimen. 



a. — A beautiful sucker, called an '' arolia." Li mounted 

 specimens, the lateral halves of this are usually placed to- 

 gether so as, on superficial inspection, to appear like a claw. 



Drawn by TufFen West. 



J3 



>J 



EXPLANATION OF PLATE VIL 



Fig. 1. — This figure represents the slide of Glass Larva (Corethra 

 2)Iumicornis), which is preserved so as to show beautifully its 

 serpentine appearance. This has been pointed out by West- 

 wood. 

 €., Eye. 



o. , Ocellus. So far as I know or remember, it is the only 

 larva having just such an arrangement of visual organs, viz. — 

 Compound eyes and ocelli, 

 ifc.d. , a mass of undigested food. 



a.f., Anterior pair of floats, analogous to the swim-bladders of 

 fish. 

 2?./., Posterior pair of floats. The floats in life are much 



