lOOG.] OF SOUTH K I IN INDIA AND CByLON. G81 



radula is essentially the same as in Farran's* specimen, but the 

 median tooth is a little lov/er and broader and the side-teeth are 

 more distinctly denticulate. 



Kelaart's specimen is not accompanied by any name or note, 

 but I strongly suspect that it is JJiphylUdia marmoraia'^. His 

 description is vague antl the plate, which is very bad, adds 

 nothing to it. But perluips the living animal might be identified 

 by its coloration. Kelasirt says the body (^. e. the sides of the 

 body under the mantle, as the plate shows) is white find spotterl ; 

 the mantle yellowish brown and rmwbled with darker brown or 

 greenish brown ; the veil white, with a yellow margin. The 

 colour of L. cmerea in life is unknown. 



LixGUELLA VAETOLOSA Bergh. 



(Bergli, Malac. Unters. in 8emper's E,eisen, Theil vi. 

 Lieferung i. 1904, pp. 21-24.) 



Five specimens are perhaps referable to tliis species, which is 

 recorded from China. They represent two well-marked varieties, 

 which may possibly prove to be distinct species, and in all the 

 raduia differs slightly from Bergh's description. That description, 

 however, was made from a single specimen, and the differences 

 observed do not appear to exceed the variations possible within 

 the limits of a species. 



In two specimens (A) the external characters correspond closcily 

 with Bergh's description. In two others (B) the doi-sal tubercles 

 are much smaller and arranged in continuous ridges, which 

 materially modify the geneiul appearance. The fifth (C), how- 

 ever, stands midway between these groups, and suggests that they 

 are both varieties depending on the size and arrangement of the 

 tubercles. The buccal parts are essentially the same in all. 



A. The larger of the two specimens is about 43 mm. long and 

 17 mm. broad. The conformation of the anterior part seems to 

 be as in Tjlngudla, but the portion before the rhinophores is much 

 contracted and bears only a few minute tubercles. The colour is 

 uniform bi-ownish yellow. The back is studded with large and 

 small tubercles, which towards the rhinophores show a tendency 

 to arrange themselves in 5 longitudinal lines. The larger tuljercles 

 are as much as 1'5 mm. in diameter, and bear a dark spot or 

 depression in the middle. The branchiaj and side-lamellae are as 

 described by Bergh, and behind the branchiae is a globular or ovate 

 body, apparently a modified lamella, measuring about 2*5 mm. by 

 1'5 mm. The foot is grooved in front and Avitli small pointed 



* Farran's doscription of tlie raduia is liable to misinterpretation. He says : 

 " The first lateral tootli with 9 denticulatioiison the outer edge. The teeth increase 

 in length outwards, the number of denticulations decreasing." But the denticles do 

 not decrease from 9 downsvards. They attain the number of 18 or 20 before they 

 begin to decrease. 



f lie expressly- registers DipUyllidm and Linf/uelia as synonyms under 

 D.furmnga. 



