68 



A. E. SHIPLEY 



Céphalothorax clavatus, truncatus, benedistinctus. Annuli corporis 

 numerosi (c. 90), anteriores brèves, posteriores brevissimi, serru- 

 lato-dentati. Stigmata confertim aggregata, in séries quatuor vel 

 quinque alternatim positas collocata. Hamuli elongati, geminati, 

 subaequales, accessorii cum principalibus arcte cohaerentes. 

 Fulcrum latum, elongatum, rotundatum. Longit. 11 mm., lat. 

 1-7 mm. » 

 Status perfectus hucusque ignotus. — Leuckart. 



Habitat. — Found in a great number of Reptiles and Fishes 

 in Brazil, either free in body-cavity or encapsuled on the viscera 

 and mesenteries or in the muscles. The following is the list of 

 Fishes given by Parona (1) : Acara crassipinnis (Hydrogonus ocel- 



latus), Bagrus pemecus [Arius 



sp.), Bagrus mesops {Arius 



Herzbergi and A. mesops), 



Macrodon trahira, Salminus 



brevidens, Tetragonopterus 



argenteus, Pygocentrus piraya 



(Serrasalmo piraya), Raphio- 



don vulpinus (Cynodon vulpi- 



nus), Pimelodus megacephalus, 



P. vituga, P. pirinampus {P. 



typus], Phractocephalus hemi 



liopterus , Platystoma tigri- 



num, Platystoma platyrhyn- 



chus {Hemisorubim platyrhynchus), Pellona castelleana (P. flavipin- 



nis), Symbranchus marmoratus, Gymnotus electricus, Carabus bra- 



chyurus [C. fasciatus), Sternarchus albifrons and Tseniura motoro. 



The following list of Reptiles is given in Diesing's Monograph : 

 Podinema teguixin [Tupiiiambis teguixin), Podinema sp., Bothrops 

 juraraca {Lachesis lanceolatus), Elapssp., Pseuderis sp., Tropidonotus 

 sp., Coluber sp., Eunectes se y taie {Eu. murinus). 



This species must be very common in Brazil. In the Naturhisto- 

 risches Muséum in Vienna, the Diesing collection contains over 

 forty phials, some of them with many dozen examples of this 

 species. As a rule, the spécimens fall into two catégories, those 





Fig. 12. — Porocephalus gracilis Diesing. 

 — A, anterior end of body 'X i, 5. — 

 B, hook X 6. Both after Parona. — C, 

 body in natural size. 



(1) Annali del Mmeo cic. di slor. nul. di Genuva, (2), IX (XXIX), 188'J-90. 



