202 



PROCEEDI^fGS OF THE NATIONAL MUSEUM. 



VOL. 50. 



latter and is 15 mm. long. The characteristic boss shows as a ciitic- 

 ular fold 1.5 mm. from the anterior end on the ventral surface. Also 

 in the midventral line, and 270 p, from the anterior end, is the open- 

 ing of a unicellular gland which lies against the esophagus. The 

 mouth has two lips, each bearing two small papillae at its base. The 

 vestibule is 50 ^ long. The esophagus is half as long as the entire 



body and has a trihe- 

 dral lumen. Its ante- 

 rior muscular part is 

 very short, 252 /x long. 

 It ends just behind the 

 excretory pore and is 

 surrounded b y the 

 nerve ring near its 

 middle. The intestine 

 is black. The rectum 

 is short. The space be- 

 tween the rectum and 

 the body wall is full of 

 large round cells with 

 conspicuous nuclei. 

 Seurat (1911) has 

 found as many as 15 

 cysts in one cockroach. 

 Seurat (1912a) notes 

 that after the third 

 larval molt, and while 

 still in the fourth lar- 

 val stage, just preced- 



After the addition of acetic acid and separation of cuti- iiitr the adult Stage the 



CLE; 6, BEFORE ADDITION OF ACID. AFTER SEURAT, 19126. , .' , 



larva grows consider- 

 ably, develops genital organs, and after it attains a certain size 

 secretes a new cuticle under the old and forms the male bursa, 

 spicules, and other structures (fig. 263). ^\lien the new cuticle 

 is stripped or separated by the use of acetic acid these structures are 

 evident. 



Host. — Epimys species, "Rat" (commonly in mole). 



Location. — Stomach (often in intestine also in usual host). 



Localities. — France (Rennes), Germany (Greifswald, Halle), 

 Austria (Vienna), Ireland, Italy (Padua), Brazil. 



This nematode is commonly reported from the mole, but Seurat 

 (1911) states that Filaria rytipleurltes Deslongchamps, found adult 

 in the rat and with larval stages in Blatta orlentalis and Periplaneta 

 ainericana^ is identical with Spirura taZpae. 



Fio. 263.— Spirura TALPAE. Male larva in fouktu stage, a, 



