204 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 50. 



Female 42 mm. long and 1.3 mm. thick. The esophagus is 1/8.9 of 

 the total body length. The conical pointed tail is 1/80 of the total 

 body length. The very thick shelled eggs are small, 15.6 /a long and 

 6.5 [JL thick. 



Host. — Mus navalis (sic). 



Location. — Intestine. 



Locality. — Ambiikohl, Egypt. 



Von Linstow states that the host name given above is a manu- 

 script name and not identifiable. [This might possibly have been 

 Microtus mvalls.'] 



PROTOSPIRURA MURIS (Gmelin. 1790) Seurat, 1915/1. 



Synonyms. — Lumbrkri muiis Werner, 1782 ; Ascarls muris Gmelin, 

 1790; Ascarls ohfusa Froelich, 1791; Fusaria muris (Gmelin) 1790, 

 „ ; : ---.. Zeder, 1803 ; Spiroptera ohtusa (Froelich, 1791) 



/^^. ''^'' '^^^^- Rudolphi, 1809; Filaria ohtusa (Froelich, 

 /^^- il^ i^'^ 1791) Schneider, 1860; Spiroptera {Filaria) 

 ohtusa Rudolphi of Parona, 1898; Filaria 

 inur'ts (Gmelin, 1790) Stossich, 1897; Spirop- 

 tera hrauni yaw Linstow, 1897. 



Specific diagnosis. — Protospirura (p. 203) : 



Rather thick worms with relatively small 



««BA.\wsi..f-- heads. There are two large lips deeply incised 



Fig. 265.— Protospieura -it i • ii i 



MURIS. Head, viewed to lorni SIX lobes arranged m two parallel rows 

 FROM THE FRONT. X ISO of tlirce etich (fig. 205 ) . When these lips are 



After Schneider, lSt36. i i i • i 



closed and viewed en lace, the central dorsal 

 and ventral lobes are obviously larger than the others and show 

 in this view a rather square outline.The four other lobes are 

 roughly conical. The two large central lobes bear on their inner 

 faces a long central tooth and two smaller teeth on each side. These 

 lobes terminate at the extremities of their squared distal ends in two 

 papilliform elevations. The four smaller lobes each bear on their 

 inner face one long tooth and on each side of this a series of much 

 smaller serrations. There are four large papillae, one at the base of 

 each small lobe near its union with the large central lobe. The 

 mouth cavity at the base of the lips opens by a wide aperture into the 

 })rominent phaiynx which is heavily lined with cliitin. Numerous 

 bands suspend the pharynx from the body walls. The esojihagus 

 is long and gradually enlarges in diameter posteriorly. It has a 

 trihedral lumen. It connects Avith the intestine by a valve. The 

 cuticle is prominently marked with conspicuous transverse striations, 

 and between the conspicuous striations are numerous fine striations. 

 Male 14 to 28 mm. long with a maximum diameter of over 1 mm. 



