M. F. d'A. Furtado on Viquesnelia atlantica. 253 



Digestive System. — Buccal pouch very long (as long as 

 the stomach) , pyriform-elongate, muscular layer well defined. 

 Mouth hardly conspicuous, resembling when closed the letter 

 T rather than the letter Y' Mandible with a cutting-edge 

 forming a (reentrant) right angle, the attached border uni- 

 formly convex, translucent, yellowish, lateral tips sharp, with 

 no ridges or teeth, but with visible lines of growth. Tongue 

 strong, pointed, deeply concave, its sheath very prominent^ 

 straight, club-like, inclined downwards. Radula of strong 

 conical or slightly depressed teeth in fifty transverse rows, 

 each with about thirty teeth, forming chevrons which point 

 backwards. (Esophagus about one third of the length of 

 the stomach, gradually increasing in diameter backwards. 

 Stomach curved, fusiform, twice as wide as the oesophagus, 

 yellow, very pale in some individuals, with whitish longitu- 

 dinal lines, which indicate internal rugosities. Intestine form- 

 ing about half the length of the alimentary canal, equal in 

 diameter to the oesophagus, whitish and partly transparent ; 

 its course simple, describing a letter N, nearly all of which 

 lies in one transverse plane. Salivary glands largely deve- 

 loped, lying upon the anterior fourth of the stomach, quite 

 separate from eacli other, white, lobed. Liver very large, 

 bilobed, the larger lobe to the left, the anterior end curved 

 round the central part of the stomach, the posterior end curved 

 round the hermaphrodite gland ; the smaller lobe applied to 

 the hinder part of the intestine, sending a process into each 

 bend, the posterior extremity lying along the rectum. The 

 lobulation of the liver is conspicuous upon its lower surface ; 

 the colour uniform, bright and essentially composed of 

 yellow and pink. The liver adheres strongly to the base of 

 the stomach, and to the first part of the intestine. 



Repeoductive System. — Hermaphrodite gland very large, 

 pyriform, of from five to six lobes, each of which consists of 

 from ten to fifteen lobules ; colour milky. The gland lies in 

 the concavity formed by the curved posterior extremity of the 

 larger lobe of the liver, and is partly enclosed by the small lobe. 

 It adheres slightly to the liver, but is entirely free in some 

 individuals. Duct of hermaphrodite gland large, twice as long 

 as the gland, more or less sinuous, of uniform diameter. 

 Albuminiparous gland unequally bilobed, convex posteriorly, 

 excavated in front and receiving the duct of the hermaphrodite 

 gland, subdivided into irregular lobules, position transverse. 

 Oviduct — prostatic portion wide, sinuous, white, translucent, 

 the dilated part remote from the albuminiparous gland, origin 

 from gland not terminal ; infraprostatic portion much curved, 

 constituting nearly half the oviduct. Spermatheca spherical 



