92 



REPORT UPON A COLLECTION OF 



which in some specimens are nearly confluent, each group with about six 

 pores. Anal opening close to the anterior end of the pygidium, sur- 

 rounded by some chitinization but not by a heavy ring as in P. parvula. 



Fig. 14. Protodiaspis lagunae n. sp. : pygidium. 



Fig. 15. Protodiaspis lagunae n. sp. : A, adult male; B, pygidium of larva; C, 

 antenna of larva; D, antenna of male. 



Margin of the body anterior to the pygidium with a continuous single or 

 double row of small gland spines. 



Second stage (from exuvium) closely resembling the adult, but with 

 very few dorsal ducts. The exuvium is shed in the normal manner by the 

 pushing back of the ventral skin and does not at all enclose the adult. 



