Fig. 191. DEVELOPMENT OF SPIRUKOlOKA 



AJ — ~0 nathostoma spinifferum (A — Larva emerging from egg through 

 opercular t^nd ; B — Newly hatched larva with loose enveloping sheath, 

 anterior spine : C — Anterior end of larva dissected from oy clops on 

 first day of infection, no anterior spine but large fleshy lip. two pairs 

 of contractile cervical sats; D— Larva from Cyclops on fourth day of 

 infection, cephalic bulb with four rows of miuut€ spines, lip smaller ; 

 F — Larva in body cavity of ryclops; E — Same larva; O — ^Larva from 

 cyst in mesentery of cobra; H- — -Head, bulb and lips of larva from liver 

 of artificially infected cat; I — Gnathostoiue from liver of artificially in- 

 fected cat; J — Section of liver of cat showing riddling of tissue by 

 burrowing gnathostomes) . K-M — Stages in the development of Habro- 

 nema mimcae. (K — Egg with embryo; L — Second stage larva; M— 

 Third stage larva before the molt). N-O — Sections pointing out the 

 histological reaction of the fat cells parasitized by Uabronema inunca^- 

 (N — Fat cells at the beginning of the infection showing peripherial 

 Uiickening and hypertrophy of parasitized cell in relation to normal; 

 O — Section of a fat sac enclosing many parasites). P — Fragment of 



fat tissue of larva of Slu^ca dom-fstica showing aciculate larva of H. 

 muHcae in hypertrophied and transformed fat cell. Q-S — Development 

 of H. microatomurn in Stomoicys. (Q — Group of adipose cells of the larva 

 of Stomoxyti of which three are infested with a young larva of H. 

 tnicrostamum ; R — Sausage shaped larva; S — Older second stage larva). 

 T-CC — Draachia nie{jastoiua. (T — Embryonated egg; U — Aciculate larva 

 emerging from egg shell; V — Aciculate larva in intestine of fly; W — 

 Second stage larva immediately after molt in malpigbian tubules of fly 

 larva; X-Y — Second stage larvae recovered from larva (X) and pupa 

 (Y) of fly; Z — Full grown second stage larva; AA — Second stage larva 

 about to molt; BB — Second stage larva, full grown and about to molt, 

 removed from malpigbian cyst; CC — Posterior end of same). A-D, 

 after Refuerzo & Garcia. 1938. Philip. J. An. Ind. (5 (4)). E F, 

 after Prommas and Daengsvang, 1933, J. Parasit. G-J, after Chandler, 

 1925, Parasit. v. 17. KCC. after Roubaud and Descazeaux, Bull. Soc. 

 Path.' Exot., V. 14, 15. 



285 



