1898.] NATURAL SCIENCES OF PHILADELPHIA. 259 



Fig. 28. Prophysaon Andersoni (Coop.). Oakland, Cal. Mus. no. 



69,010a. 

 Fig. 29. Prophysaon Andersoni (Coop.). California. Mus no, 



71,071. Received from W. G. Binney as P. Hemphilli B. & 



Fig. 30. Prophysaon cceruleum Ckll. 



Fig. 31. Binney a notabilis Cooper. Guadalupe Island. Mus.no. 



71,923. 

 Fig. 32. Prophysaon folio latum (Gld.). Seattle, Wash. 



Fig. 33. Hesperarion niger (Cooper). California. Mus. no. 71,- 



078. o. t., ovo-testis ; L, liver, I 7 , tail. 

 Fig. 34. Prophysaon fasciatum Ckll. Seattle, Wash. Mus. no. 



68,026. Salivary glands and anterior portion of liver removed, 



genitalia and digestive tract in situ. 

 Fig. 35. Anadenulus Cockerelli (Hemphill). One of the original 



lot. 

 Fig. 36. Hemphillia camelus Pils. & Van. Old Mission, Idaho. 



Mus. no. 63,926. o. t., ovo-testis. 



Plate XII. 



\_Epi., epiphallus; p. p., penis papilla; r. p. penis retractor; v.d., 



vas deferens]. 

 Fig. 37. Prophysaon fasciatum Ckll. Seattle, Wash. Mus. no. 



68,026a. Perhaps abnormal. 

 Fig. 38. Prophysaon fasciatum Ckll. Same locality. Ovo-testis. 

 Fig. 39. Prophysaon fasciatum Ckll. Same locality. Mus. no. 



68,025. 

 Fig. 40. Same specimen, atrium and base of the epiphallus, the 



binding muscle removed. 

 Fig. 41. Hemphillia camelus Pils. & Van. Type specimen. Mus. 



no. 63,926. 

 Fig. 42. The same, penis opened. 



Fig. 43. Hesperarion niger (Cooper). Spermatophore. 

 Fig. 44. Hesperarion niger (Cooper). Santa Clara, Cal., collected 



Nov. or Dec, 1896. 

 Fig. 45. Hesperarion niger (Cooper). Mus. no. 71,078. Apex of 



penis opened. 

 Fig. 46. The same, side view of penis-papilla. 

 Fig. 47. Hesperarion niger (Cooper). Mus. no. 71,077. 

 Fig. 48. The same. Spermatheca. 

 Fig. 49. Hemphillia grandulosa B. & B. Apex of penis opened, 



showing papilla. 

 Fig. 50. Hemphillia glandulosa B. & B. Lower portion of genital 



system. Astoria, Oregon. 



Plate XIII. 



[/. ov., free oviduct ; muse., muscle connecting atrium and epiphal- 

 lus ; sp., sp. d., spermatheca and its duct ; vag., vagina ; ped., 

 peduncle of the epiphallus.] 



