298 MR WALTER E. COLLINGE ON THE 



Damayantia, Issel (em. Cllge.). 



Damayantia, Issel: Moll. Bom., 1874, p. 389. 



Animal limaciform, long and tapering posteriorly, dorsum sharply keeled and 

 definitely marked off from the posterior portion of the body ; anteriorly the dorsum is 

 marked with two lateral grooves. Mantle, which completely covers the shell, exhibits 

 a well-defined right and left keel, the right one overlapping the left posteriorly. 

 Tentacles four. Visceral mass situated anteriorly, and lying more to the right side 

 than the left. Rugse somewhat rhomboidal in shape, absent in the region of the mantle. 

 Peripodial groove well defined. An obliquely placed, oval caudal mucous pore present. 

 Generative orifice on the right side, slightly below and behind the right lower tentacle. 

 Respiratory orifice on the right side of the mantle. Foot-fringe well marked. Foot-sole 

 not divisible into median and lateral planes. Shell very small, almost entirely 

 membranaceous. Receptaculum seminis sessile. Dart with solid calcareous head, at 

 the base of which is a small opening. 



Damayantia is undoubtedly related to the genus Philippinella of Mollendorff (8). 



1. Damayantia dilecta, Issel. 



Damayantia dilecta, Issel : Moll. Born., 1874, p. 390, T. iv. figs. 4-6. 



PI. I. figs. 1-3. 



Animal yellowish-brown. Mantle completely covers the shell, minutely spotted 

 with black. Keels well developed on the postero-lateral portions of the visceral mass 

 and overlap one another posteriorly on the median line. The dorsum is sharply keeled. 

 Ruga? small anteriorly, postero-laterally large and somewhat rhomboidal, absent on 

 mantle. Caudal mucous pore large and overlapped by the extremity of the tail. 

 Peripodial groove well defined. Foot-fringe yellowish in the anterior region, brownish 

 posteriorly ; lineoles faint and set very closely. Foot-sole white, narrow, divided into 

 median and lateral planes. 



Length (in alcohol) 28 millim. 



Hob. — Mt. Penrissen, 2800-3500 feet, 1 specimen. 



Issel (6, p. 28) mentions the presence of two longitudinal and medial furrows on the 

 top part of the head, and at the sides two polygonous tubercles. In the specimen 

 examined these features were not discernible. 



2. Damayantia carinata, n. sp. 

 PL I. figs. 4, 5 ; PL II. figs. 22, 23. 



Animal greyish-brown, postero-laterally a faint dark band runs from the posterior 

 end of the visceral mass to the tail ; lateral grooves well defined. Mantle completely 



