_Dipylidium Cysticercoid larva caninum_ L. Man, Dog, (Fig. 43), Body-cavity of (= _Taenia Cat _Cryptocystis_ _Trichodectes_ and cucumerina_ trichodectis_ _Pulex_ of Dog Bloch = _T. Vill. elliptica_ Batsch) _Hymenolepis_ _Cercocystis_ Usually absent _murina_ Duj. Mouse, Rat Vill.[104] (develops in parental host) _H. nana_ Man Unknown v. Sieb. _H. diminuta_ Meal-moth, _Asopia_ Rud.(= _Taenia Man, Mouse, _Cercocystis_ (_Pyralis_) flavopunctata_ Rat Vill. _farinalis_; also Weinl.) certain Orthoptera and Coleoptera _Drepanidotaenia_ Duck, Goose, _Cercocystis_ The Ostracods {84} _gracilis_ Zed. Wild Duck Vill. _Candona rostrata_ and _Cypris compressa_, and also _Cyclops viridis_ _D. anatina_ Duck " " _Cypris incongruens_, Krabbe and also Perch _D. setigera_ Goose " " _Cyclops brevicaudatus_ Fröh. _D. infundibuliformis_ Goeze Common Fowl " " House-fly _Dicranotaenia Duck " " _Cypris ovum_ coronula_ Duj. _Davainea proglottina_ " " ? _Limax cinereus_, Dav. Fowl _L. agrestis_ _D. madagascariensis_ Unknown Dav. Children _D. friedbergeri_ Unknown ? Ants v. Linst. Pheasant _Mesocestoides lineatus_ Dog Unknown Goeze Plerocercoid, Probably first enters _Bothriocephalus Man, Dog, i.e. solid, an Invertebrate host, latus_ Brems. ? Cat elongate larva, which is eaten by with no bladder Pike, Perch, Trout, etc. [Illustration: FIG. 40.—A, Stickleback (_Gasterosteus aculeatus_) infested by an advanced larva of _Schistocephalus solidus_ Crepl. B, The larva. All × 1½. (From specimens in the Cambridge University Museum.)]