39] 



PROTEOCEPHALIDAE — LA RUE 



39 



Lobes spheroidal, thick. Uterus when fully developed possessing 5-7-8 

 lateral pouches on either side. Eggs provided with three membranes. 

 Outermost membrane 0.050-0.075 mm. in diameter, embryonal covering 

 0.032 mm., embryo 0.027 mm. 



Habitat : In intestine of host. 



0. F. Miiller (1782:28-29) stated that he had seen cestodes from the 

 intestine of Gasterosteus. He, however, did not describe the species nor 

 did he propose a name for it. One of his drawings of this cestode in its 

 natural size presents so little detail that it is of little value. Miiller 's 

 Taenia gasterostei which he found in the body cavity of Gasterosteus 

 is none other than Schist ocephalus solidus. Batsch (1786:224) and 

 Schrank (1788:49) followed Miiller in using this name to designate 

 the cestode found in the body cavity of the stichling. Batsch (1786: 

 241-242) gave but a few notes on Miiller 's Taenia from Gasterosteus 

 and he referred to Miiller 's (1782:28-29) article and figures. Gmelin 

 (1790:3079) used the name Taenia gasterostei to designate the cestode 

 found in the intestine of Gasterosteus aculeatus by Miiller. Gmelin 's 

 diagnosis reads: "TAENIA GASTEROSTEI 81.— T. tenuissima, 

 cauda obtusa. Mull. Naturf. 18. p. 28. t. 3. /. 6. 7. Habitat in gasteros- 

 tei aculeati intestinis, minima, articulis nudo oculo vix discernendis." 

 This name is unavailable because of Miiller 's prior use of it for the 

 cestode of the body cavity. Zeder (1800:255) in his Nachtrag used the 

 name Alyselminthus gasterostei to designate this form. His description 

 is not at hand. Rudolphi (1802a :114-115) gave this species the name 

 Taenia filicollis. His specimens came from Gasterosteus aculeatus at 



*Type host. 



