738 



ARTHROPOD A 



Porocephalus najse Leuckart, i860. 



Synonym. — P. naj£B sputatricis Leuckart, i860. 



Morphology. — Body imperfectly cylindrical, with about fifty 

 rings. Length, 4-5 millimetres long by o-6 millimetre broad. 



Distribution. — Found in cysts in the abdominal muscles and peri- 

 toneum of the cobra. 



Flint's Parasite. 



Flint described the parasite at a meeting of the New York Patho- 

 logical Society on December 12, 1876, as occurring in a man from 

 Albany, Gentry County, Montana. This man had cavities in his 

 lungs, and coughed up 75 to 100 parasites, which could crawl about 

 the floor and could live for ten days in a bottle; moreover, they could 

 resist freezing. 



With regard to these parasites, which at the time were considered 

 to he Porocephalus armillatus (i.e.,Pentastomum constrictum) ySamhon 

 points out that, if genuine Linguatulida, they can hardly belong to 

 an African species, as the case occurred in America, and therefore he 

 is inclined to believe that they must belong to P. crotali Humboldt, 

 1808, which are found as adults in Crotalus adar.'Mnteus Beauvois, 

 C. horridus Linnaeus, and C. terrificus Laurent, while the nymphse 

 have been found in Marmosa murina Linnaeus, the murine opossum. 



Porocephalus crotali Humboldt, 1808. 



Synonyms. — Echinorhynchus crotali Humboldt, 1808; Distoma 

 crotali Humboldt, 1808; Distoma crotali durissi Rudolphi, 1809; 

 Porocephalus crotali Humboldt, iSii; Polystoma prohoscideum Ru- 

 dolphi, 1S14 ; Pentastoma prohoscideum Rudolphi, 1819; Linguatula 

 proboscidea van Beneden, 1849, P^^ parte; Porocephalus humboldti 

 Mayer, 1852; Linguatula quadriuncinata Mayer, iS^2; Porocephalus 

 moniliformis Megnin, 1880, pro parte. Nymph. — Pentastoma sub- 

 cylindricum Diesing, 1836. 



Remarks. — This porocephalus was discovered by Humboldt in 

 the lungs of the tropical rattlesnake. 



Morphology. — When fresh, it is of a bright yellowish colour, with 

 elongate, incurved, cylindrical body, somewhat flattened ventrally 

 and club-shaped anteriorly, and is transversely encircled by over 

 eighty flat bands. It is said to have an ovoid-shaped mouth on a 

 line with the hooks, and two prominent papillae. 



Distribution. — It is thought to be coextensive in its distribution 

 with the genus Crotalus — i.e., the United States, Mexico, and 

 Brazil. 



Pathogenicity. — Possibly it is the cause of one form of poro- 

 cephalosis in man. 



