1879.] 



NATURAL SCIENCES OF PHILADELPHIA, 



149 



indistinctly the segments of the organ. Total length of the pro- 

 boscis, when extended, about three times that of the claspers. 

 Total length 12-14 mm. Habitat, Woodbury, New Jersey. 



Y$r 



Head of male with proboscidiform organs uncoiled, from the side. Same, viewed from 

 before, with [iroboscidiform organs coiled up and retracted between the claspers. Head of 

 female from above. 



I name the above species in honor of Mr. D. S. Holman, Actu- 

 ary of the Franklin Institute, in recognition of the services he has 

 rendered in devising methods for studying living objects, both 

 large and small, under the microscope, and to whom I am also in- 

 debted for the specimens from which the above description has 

 been taken. 



The detection of a member of the genus in this country is very 

 interesting, but less so than the detection of Pauropus huxleyi 

 Lubbock, in the vicinity of Philadelphia, without any difference, as 

 far as Mr. Lubbock's excellent plates of English specimens would 

 enable one to judge, that would make it even a variety, although 

 removed by more than 3000 miles of ocean from its congeners. 

 It has been suggested, however, that, inasmuch as Philadelphia is 

 an old English settlement, Pau?-o])us may have been introduced, 

 but in the case of Chirocephalus such an explanation is less open 

 to acceptance. 



