LAMELLISABELLA ZACHSI 



425 



less paired papillae are counted, both those with horseshoes and those with 

 simple plaques, then the number of metameric papillae reaches 27-30 pairs. 

 The broad ventral sulcus (Figs. 2, 163i?) stretches between them to the hind 

 end of the metameric part. As in Lamellisabella johanssoni (p. 429), the cuti- 

 cular plaques consist of thick, black horseshoes, each with an apodematous 

 outgrowth projecting inwards and a delicate membrane surrounding it, 

 с 60/x across. The plaques lie on heart-shaped pulvilli, each of which has a 



■>* 



Fig. 163. Lamellisabella zachsi: A - front end of a weakly contracted individual from the dorsal 

 side; В - the front end of a strongly contracted female from the ventral, and, С - from the dorsal 

 side. 



с - cephalic lobe; со - dorsal ciliated band; d - opening at the base of the tentacular cylinder, 

 putting its cavity in communication with the external environment; f - keel of the bridle; 

 gt - globular and pyriform glands seen by transparency; p - cuticular plaque; pa - papillae; 

 peg- pores of single-celled epidermal glands; pit - pulvillus; s 2 - groove between the mesosoma 

 and the metasoma ; sv - ventral sulcus ; tc - tentacular crown. 



