VAGINULUS. 



491 



angustus, transversim regulariter et ci-ebre tenuistriatura. Onfi- 

 cium genitale inferius in parte pallii dextera versus medium 

 4 mill, a pede erumpeus." {lapparone Ganefri). 



Length 5'.), breadth 18 mill. 



Hah. Burma : Thigyan, Upper Iravvaddy {Fea). 



This species is considerably larger than V.proximus and some- 

 what broader in proportion to its leugtb. The body has almost 

 the shape of an elongated rectangle, the lateral margins ot the 

 mantle being nearly parallel, while the anterior and posterior 

 marenns are scarcely attenuated and almost truncate. ihe 

 mantle, in the upper part, is densely covered with minute granules 

 and ruoje, and marked with small confluent blackish spots, dis- 

 posed m two lateral series, nearer to the margin than to the 

 median line, which at the middle of the margin is paler, ihe 

 lower part of the mantle and the foot are pale without a trace ot 

 spots The foot is rather narrow and furnished, as in the other 

 species, with numerous thin transverse striae. The female genital 

 orifice is placed at the middle of inferior right side ot the mantle 

 at a distance of about 4 mm. from the foot. 



481. Vaginulus gigauteus, Godwin- Austen. 



Vuiiimdus giyantem, Godwin-Austen, P. Z. S. 189.-,, pp. 443, 451. 

 Oriqinal .Zescr/^^/iou:-" Animal elongate in form; female orifice 

 28-5 mm. from the extremity of the foot, 6 from the middle line 

 of the foot, 1-5 from the pedal groove. The colour in the 

 spirit-specimen is above grey, with dark motthugs, paler near 

 the head, and a narrow pale line down the centre ot the back ; 

 below dull ochre. Upper surface smooth to the eye, under the 

 lens closelv pitted. The sole of the foot narrow, slightly wider 

 than the adjacent uuder surface. The foot is crossed by rather 

 close, very regular folds, which form distinct grooves across it, 

 very thin, even in width; there are twenty-two such folds m 

 10 mm. of length, and each transverse fold is divided by a very 

 fine secondary groove. The tentacles, although contracted, are 



^'" Total lenc^th 68 mm. ; total breadth 2-3 ; breadth of foot 9." 

 Hah Andaman Islands : Port Blair {Harold Godwin- Austen) 

 "This is a remarkably large species, 13 mm. larger than 

 auvthiug described by Semper from the Indian region; the 

 larWst mentioned and figured by him is I. voir/tn, described 

 from a specimen in the Copenhagen Museum. Locality unkno\\n. 

 It differs from Semper's drawing of this species m being nar- 

 rower as compared with its length, and in the sole of the tooi; 

 Semper's drawing is life-size and could not tail to show the 

 transverse ridges." (Godwin-Austen.) 



