145] PROTEOCEPHALIDAE—LA RUE 145 



This species was first described by Leidy (1887:22-23). His speci- 

 mens were secured from the stomach of Ambloplitcs rupcstris, Lake 

 George, New York. His diagnosis reads: 



"Taenia Ambloplitis. — Head quadrate, spheroidal, consisting almost entirely 

 of the four large spherical bothria, with the summit slightly prominent and conical 

 or depressed and unarmed ; neck very short or none ; body compressed cylindrical, 

 gradually widening from the head to near the posterior part, where it slightly 

 narrows to the end ; segments linear, becoming gradually longer and wider, and 

 the more quadrate, all deeply and pretty regularly wrinkled into two or three 

 annuli. Genital apertures obscure. Length 8 to \2 inches; in alcohol contracted 

 to 2> l A to 5 inches ; greatest width 2 ram. 



"Head 0.5 to 0.625 mm. long and 0.75 to 0.875 broad. Bothria 0.375 rn m - 

 diameter. Commencement of body 0.625 wide. Anterior segments 0.125 long, 0.625 

 wide; subsequently 0.375 long and 1.5 to 1.875 wide; posterior segments 0.75 long 

 by 1 mm. wide. 



"A number of specimens from the stomach of the Rock Bass Ambloplites 

 rupcstris. Lake George, New York. 



"This species resembles the Taenia ocellata Rudolphi of the European Perch, 

 Perca fluviatilis, and perhaps is the same." 



Leidy 's drawings of the head and proglottids are reproduced (Figs. 

 134a and b). Immediately following his report on Taenia ambloplitis 

 Leidy (1887:23) reported Taenia micropteri from the intestine of Mi- 

 cropterus salmoides (nigricans) Lake George, N. Y. in the following 

 words : 



>l Taenia Micropteri. — Head large, compressed spheroidal, with four subter- 

 minal spherical bothria and a papilliform unarmed summit; neck none; body ob- 

 scurely segmented, and with no obvious internal organs, posteriorly variably nar- 

 rowed and obtusely rounded at the end. Length from half an inch to an inch, 

 and about 1 mm. wide. Apparently a larval form ; found in the body cavity of 

 the Black Bass, Micropterus nigricans. Six worms, soft, white, and active. The 

 longer ones of an inch would elongate to double the length, becoming proportion- 

 ately narrower. The head, about 1 mm. or more in diameter, varied in length and 

 breadth, according to contraction, sometimes one and sometimes the other being 

 the larger. Lake George, N. Y." 



This form is probably the larval form of P. ambloplitis. In dimen- 

 sions and in general character the two forms are very much alike, even 

 to the papilliform unarmed summit of the head. The obscure segmen- 

 tation was probably due to wrinkling, not to a true segmentation. P. 

 ambloplitis is the only adult Proteocephalid reported from Micropterus 

 dolomieu and M. salmoides and it is known to occur in a closely related 

 host species in the same lake in which Leidy found Taenia micropteri. 

 This is additional evidence in support of the view that Leidy 's species 



