OX SOME NEW PENTASTOMIDS. 115 



10. On some new Pentastomids from the Zoological Society's 

 Gardens, London. By Mary L. Hett, B.Sc, F.Z.S., 

 Demonstrator of Zoology at Bedford College for 

 Women, University of London, 



[Received December 11, 1914 : Read March 9, 1915.] 



(Text-figures 1-4.) 



Index. 



Systematic : Pa»e 



Porocephalus grandis, sp. n 115 



P. globicephalus, sp. n. . 118 



P. bifurcatus, var. oriental is, nov. 120 



P. b. var, mediterraneus, nov 121 



While reporting on the Pentastomids obtained from the 

 Zoological Society's Gardens during the past twelve months, I 

 have observed a certain number of individuals which apparently 

 belong io new species or varieties. 



1. Porocephalus granois, sp. n. (Text -figs. 1, 2.) 



There were in all seven specimens of this Pentastomid obtained 

 from African vipers, viz. : — 



1 cT and 1 § from Bitis gabonica. 

 4 $ ?s from Cerastes comutus. 

 1 2 from Bitis nasicomis. 



The male specimen is probably mature, the female specimens 

 are certainly so, the uterus in all cases containing embryos in 

 different stages of development. 



The female specimens (text-fig. 1, A) vary in length from 78 

 to 94 mm., the average length being 82 mm. The width is 8 to 

 9 mm. There are 22 strongly projecting rings on the body and 

 2 or 3 indistinct ones on the head. Stigmata are numerous over 

 the entire surface of the body. 



The single male specimen is 30 mm. long. The rings number 

 about 26. 



The hooks are simple and, together with the mouth, lie in a pit 

 bordered by papilla?. The pit may be due to contraction after 

 death, but this seems hardly likely, as it is found in all the 

 specimens. The mouth is nearly circular and lies between the 

 inner pair of hooks (text-fig. 1, B). 



The body tapers towards the posterior end. The terminal 

 segment is small and conical ; it bears the transverse, slit-like 

 anus, in front of which lies the genital aperture in the female 

 (text-fig. 1, C). 



