Hie Eotatorian Genus Diaschiza. 



TI. WITH CERVICAL EYE. 



5. Diaschiza lacinulata Miiller. Greatest size-j-^-Q in. (158 ll) G. 



6. „ ventripes Dixon-Nuttall „ yig in. (133 ll) J. 



7. „ Hoodii Gosse „ y^ in. (195 ll) E 1. 



8. „ Dcrbyi sp.n. Nuttall and „ y|^ in. (141 ll) I. 



Freeman. 



9. „ exigua Gosse. „ 26o i n - (98 ll) L. 



III. NO EYE. 



10. Diaschiza cosca Gosse. Greatest size j-^ in. (204 /a) C. 



11. „ tenuior Gosse. „ t ^q in. (195 ll) E2. 



12. „ eva Gosse. „ ^ in. (267 ll) B 1. 



13. „ tcnuiseta Burn „ gL j n- (267 fi) B 2. 



14. ,, ? megalocephala Glascott „ T |- 7 - in. (200 /*) L . 



This genus comes as a connecting link between the Loricata 

 and the Illoricata. 



The integument of the greater part of the trunk is stiffened in 

 four plates (in future called the lorica), two latero-dorsal and two- 

 ventral. In between these plates, and also to the rear of these 

 plates, the integument is very soft and flexible. 



From a front view the cleft between the dorsal plates is seen 

 as a V ; that between the lateral plates as a U ; and that 

 between the ventral plates is fiat as an kh. 



The head is covered with somewhat stiffened integument, not 

 so stiff as the plates on the trunk but stiffer than that on the rear 

 of the trunk. It is separated clearly from the trunk by a neck 

 which is formed by the frontal edges of the four plates. 



In shape the body is more or less cylindrical, sometimes late- 

 rally, sometimes dorso-ventrally compressed, sometimes neither. 



The antennae are, as usual, three in number, one dorsal, on 

 the head, about three-quarters back from the front. The two 

 lateral are symmetrically placed in the lumbar regions about 

 three-quarters of the way down the trunk in the latero-dorsal 

 plates. 



The trunk projects from the lorica into a flexible, somewhat 

 retractile foot, poorly jointed, from which extend two furcate toes. 



There are three divisions of the genus, the first possessing a 

 frontal eye ; the second a cervical eye on the occiput or hinder 

 part of the brain ; the third without a coloured eye-spot. 



In every species of the genus the lips of the buccal orifice 

 project more or less. In some, as in D. Hoodii q. v., this projec- 

 tion is so marked that it was mistaken by some authors for a 

 projection of the tropin. In no case do the jaws, or any part of 

 them, project through this orifice. 



b 2 



