124 



briefly conclude the history of the tumours by observing that they 

 ■were composed of condensed accumulated layers of the sub-mucous 

 cellular tissue, presenting a flat surface next the muscular coat, to 

 ■vvhich the larger tumours firmly adhered, and projecting -vvith a 

 rounded convexity towards the cavity of the stomach, -vvhere the si- 

 nuses opened and terminated. They did not contain any of the 

 caseous secretion characteristic of struma, but were most probably 

 caused by the irritation of the Entozaa. 



"The dimensions of the larger Entozoa above given are those of 

 the female : the malė is about one fourth smaller. In both sexes the 

 body is slightly attenuated at the two extremities ; the caudal ex ■ 

 tremity is more inflected and more obtuse in the malė ; the orai ex- 

 tremity in both is obtuse and truncate. 



" The surface of the body appears to the naked eye to be mi- 

 nutely striated transversely : it is variegated by the white genital, 

 and amber-coloured digestive tubes appearingthrough the transparent 

 integument. When examined -vvith a lens of half-inch focus, the 

 anterior two-thirds of the body are seen to be covered ■with circular 

 series of minute reflected spines, which, vįewed with a still higher 

 povver, present three distinct points, one large one in the middle and 

 two small lateral ones. 



" The mouth is surrounded by a tumid circular lip arraed with six 

 or seven circular row's of well-developed spinous processes of a simi- 

 lar complex structure to those on the body. The orai orifice itself 

 presents the form of a vertical elliptical fissure, bounded on each 

 side by a jaw-like membranous fold or process, the anterior margin 

 of ■vvhich is produced in the form of three straight horny points or 

 processes, directed forwards. These lateral processes can be pro- 

 truded beyond the circular lip by compressing the smooth spineless 

 skin behind the latter; and the elasticity of the structure causes them 

 to be again retracted on remitting the pressure. 



" The vulva is situated at the junction of the middle and posterior 

 thirds of the body ; the anus in the female is in the form of a trans- 

 verse semilunar fissure immediately behind the obtuse posterior apex, 

 and on the concave side of the inflection. 



" The anus of the malė, from the anterior part of -vvhich a single 

 slightly-curved intromittent spicttlum is protruded, is surrounded by 

 eight distinct pointed papilla, three of which are placed in a vertical 

 row on each side, and two smaller ones at the lower boundeiry of 

 the common opening to the rectum and malė glaud. 



" On comparing this Nematoid worm with those aJready described, 

 it approaches most nearly to some species which are referred by 

 Rudolphi to the genus Strongylus, as the Strongylus trigonocephalus, 

 R., (Hist. Entoz. ii. pi. I. p. 231.,) in ■vvhich species the 'Bvrsamaris 

 subglobosa, biloba, multiradiata ,' presents an approximation to the 

 structure of the extemal malė organs above described, in which the 

 eight tubercles surround the opening somewhat after the manner of 

 rays. But on pursuing the comjjarison -vve find that here the re- 

 semblance ceases : there is no subglobose bilobed sheath to the in- 

 tromittent organ in the species here described ; the head is sur- 



