231] 



PROTEOCEPHALIDAE—LA RUE 



231 



seems highly probable that Parona's drawings are intended to represent 

 the same species as do the writer's. The apparent difference probably 

 came about through Parona's using poor preparations for study. 



0. trimeresuri (Parona) in size is much smaller than 0. grandis, 

 0. marenzelleri and Crepidohothrium gerrardii. Moreover in number 

 and arrangement of testes, size and proportions of cirrus-pouch and 

 cirrus these three species differ greatly from 0. trimeresuri. In size 

 this species is more nearly related to 0. calmettei but in the latter 

 species the relations of the cirrus, cirrus-pouch and vagina are different. 

 The testes in 0. trimeresuri are arranged much as they are in 0. cal- 

 mettei but the size of the head and the suckers differ greatly. 0. nat- 

 tereri and 0. perspicua are smaller, more delicate and have very differ- 

 ent relations of cirrus, cirrus-pouch, vagina, and testes. This form 

 differs from any other species thus far described from snakes yet it has 

 its closest affinities with 0. calmettei, likewise parasitic in one of the 

 Crotalinae. 



1898 

 1898 

 1898 

 1899 

 1901 

 1908 

 1911 



OPHIOTAENIA CALMETTEI (Barrois) 

 [Figs. 11, 109, 110, 155, 156, 197, 198] 



Ichthyotaenia calmettei 

 Ichthyotaenia raillieti 

 Ichthyotaenia calmettei 

 Ichthyotaenia calmettei 

 Ichthyotaenia racemosa 

 Ichthyotaenia calmettei 

 Ophiotaenia calmettei 



Specific Diagnosis: Characters of genus. Observed length 27-40, 

 and even up to 80 cm. Maximum breadth 0.97-1.2-2.0 mm. Proglottids 

 numerous, first broader than long, subsequent ones quadrate or even 

 much longer than broad. Mature proglottids about 0.85 ram. square. 

 Ripe proglottids 2-3-4 mm. long by 1.0-1.2 mm. broad. Strobilation not 

 clear. Scolex spheroidal or tetragonal, without rostellum, without hooks, 

 without fifth sucker. Anterior face of same flattened, with small eleva- 

 tion at center. Head 1.0-1.3 mm. broad, 0.60 mm. long, 0.935 mm. thick. 

 Suckers four, somewhat globular, with deep cavity. Diameter of sucker 

 opening 0.12-0.17-0.185 mm. Diameter of sucker 0.27-0.300-0.408 mm. 

 Neck 0.580-0.980 mm. broad by 4-5-8 mm. long. 



Genital organs typical of genus. Genital aperture irregularly alter- 

 nating. Situated at or near middle of proglottid margin. Genital sinus 



