Figure 2S.—a, Copulatory complex of Discocelides ellipsoides (Girard), from sections of 

 posterior part of specimen shown in fig. 24, c; b, copulatory complex of Laiocestus whartoni 

 (Pearse), from sections of one of Pearse's specimens; c, eye arrangement of specimen of 

 Siylochus ellipticus (Girard) from Seabrook, Tex., Pearse's specimen No. 385 (this speci- 

 men has numerous cerebrofrontal eyes). (See p. 492 for Index to numbered parts.) 



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