88 A Guide to the Zoological Collections in the 



second pair of legs is modified to form a pair of great poi- 

 son-claws, the basal joints of which are broadened out to 

 form additional jaws. The Centipedes are all carnivorous. 

 Specimens of the following Indian genera are exhibited : — 

 Scolopcndra^ Otostigma, Mecistocephalus^ Orphnxus, 

 Himantarium^ Sou tiger a. 



Compare the large (aberrant) <' compound " eyes of 

 Scutigera with the small simple eyes of Scolopendra. 



ii.-MYRIAPODA CHILOGNATHA. (Millipedes). 

 [®fstmi gEaU-rasc 63], 



In the Millipedes the segments of the body are either 

 arched or completely rounded^ and, with the exception of 

 the first three to seven, each carries two pairs of legs. 

 The antennae are short and there are no poison-claws. 

 Tracheae open on each side of each segment of the body. 

 The Millipedes feed almost entirely on vegetable matter. 

 Specimens of the following Indian genera are exhibited : — 

 Glomeris, Sphseropseus, Zephronia; Acanthodesmus,Para- 

 desmus, Spirostreptus, Spirobolus. 



Observe the two patches of simple eyes, well displayed 

 in the specimen of Spirostreptus aterrimus. 



7. ARTHROPODA HEXAPODA- (Insects.) 



[i£slv-Cra0£0 70-125]. 



The Insects occupy the two series of low narrow 

 Desk-cases that lie between the large Shell-cases travers- 

 ing the middle of the Gallery and the Cabinet-cases con- 

 taining the Protozoa and Coelenterata on either side. 



The dissected preparations of the common Cockroach 

 (Case 70B) the common Grass-hopper (Case 75B) and the 

 large Wasp (Case 95A) give a good idea of the external 

 characters of a typical insect. The body consists of (i) a 

 head, made up of several (four) segments fused together to 

 form a single piece; (2) a thorax, formed of three seg- 



