Dr. Q'Bryen Bellingham on Irish Entozoa. 475 



The Filaria have been arranged by Rudolphi in two sudivi- 

 sions, according as the month is simple or papillary and labiate. 

 Ore simplici. 



. „., . ^ f Cellular membrane in abdomen of peregrine 



1. Filaria attenuata. < e ■, m > \ *■ 

 x Mfr« uvicnuuvu. ^ f a i con (j? a lco peregrinus). 



Species dubia. 



2. Filaria *. Peritoneum of red gurnard (Trigla Pini). 



3. f. Peritoneum of mullet (Mugil Capito). 



4. j> + Abdominal cavity of bee (Bombus terrestris). 



Genus 2. Trichosoma. 

 (Derived from Qp\£„ capillus.) 



Body cylindrical and elastic, of moderate length, very slender to- 

 wards the anterior extremity, and insensibly enlarging posteriorly. 

 Mouth terminal, punctiform. Male organ a simple filament con- 

 tained in a sheath. 



This genns was established by Zeder, under the name of Ca- 

 pillaria. The species are most common in birds, next in the mam- 

 malia ; they are very rare in reptiles and fish ; they inhabit the 

 stomach, the small and large intestines, sometimes the urinary 



* This species of Filaria (which does not appear to have been de- 

 scribed) occurred under the peritoneum of the common red gurnard 

 {Trigla Pini). The specimens which I possess are from three to four 

 inches in length, and about the thickness of strong thread ; the colour 

 white, body cylindrical, and of the same diameter throughout. An- 

 terior extremity obtuse and rounded, posterior acute. Mouth orbi- 

 cular and very small. In removing them, some ruptured, and allowed 

 the ovaries and intestinal canal to protrude. 



t This species (which also appears not to have been described) 

 occurred in the peritoneum of the common gray mullet (Mugil Ca- 

 pito) ; they were so imbedded in this membrane that it required con- 

 siderable trouble to remove them, and some portion of the membrane 

 continued to adhere to them, which rendered their examination dif- 

 ficult ; they are about 4\ lines in length, colour white, body slender, 

 and of the same diameter throughout. Anterior and posterior extre- 

 mity rounded, mouth obscurely orbicular ; a slight prominence near 

 the posterior extremity, at which the anus appeared to open. 



X This species I have met with upon several occasions in the ca- 

 vity of the abdomen of the common humble bee (Botnbus terrestris), 

 and sometimes in very large numbers ; they lived and moved about 

 in a watch-glass containing water for a considerable time ; they are 

 cylindrical, some are smaller than others, and in these the posterior 

 extremity is very slightly curved, in the larger (which probably are 

 females) this part is straight. They are so small as to be hardly vi- 

 sible without a lens, and in consequence of this I have not been able 

 to succeed in seeing the shape of the mouth ; hence they may pro- 

 bably eventually turn out to belong to some other genus. 



