274 Records of the Indian Museum. [Vol. X, 



at depths of from 15-30 fathoms. Several specimens were 

 obtained by Capt. Sewell off the coast of Burma in comparatively 

 shallow water. Precise details as to their provenance are not at 

 present forthcoming. 



Scalpellum (Smilium) rostratum, Darwin. 



Darwin, XLoh, Cirr. Lepadidae, p. 259, pi. iv, fig. 7 (1851). 

 Hoek, Siboga-Exp., Mon. XXXIa, p. 65, pi. v, fig. 13 (1907). 

 Sewell, Journ. As. Soc. Bengal fn.s.J IX, p. 329 (1913). 



Originally described from the Phillipines (20 fathoms), this 

 species was taken at several places in the Malay Archipelago by 

 the 'Siboga' in depths of from 8^ to 6i| fathoms. A young 

 specimen was obtained by Capt. Sewell off the coast of Burma in 

 50 fathoms (' Investigator' sta. 395 : lat. 13° 29' N., long. 97° 30' 

 E). 



Scalpellum (Smilium) sinense, Annandale. 



(Pis. xxxiii, xxxiv, fig. i.) 



Ved. Med. nafitidiist. Foven. Kobenhavii , 1910, p. 211, pi. iii, fig. 3. 



This species was first reported from the China Sea. Capt. 

 Bomford obtained three specimens on the spines of a sea-urchin 

 of the family Cidaridae (together with the tiq^es of Heterakpas 

 reticulata, described below) in 60 fathoms in the Mergui Archipe- 

 lago (sta. 534: lat. 12° 4' N., long. 96*^ 44' E.)- These specimens, 

 which were taken in April, have no males attached, although one 

 is ovigerous. 



The proportions of the valves and the shape of the terga 

 vary somewhat, the external membrane is much denser in some 

 individuals than in others, and the form of the mandible is 

 extraordinarily variable. In the specimen from China first 

 dissected there were five main teeth (including the inner angle) 

 with a small subsidiary tooth between the first two ; in one 

 Burmese example there are six subequal teeth, but in another 

 there are seven teeth, the fourth of which has, however, almost 

 the nature of a subsidiary tooth. The following appear to be 

 specific characters: — the appendage as a whole is never very 

 strongly curved, the first main tooth is never either much larger than 

 or widely separated from the second ; all the teeth (except the 

 small subsidiary ones) are of moderate size, subequal and about 

 equidistant; the inner angle forms a blunt tooth not miich larger 

 than the others and clothed with short spines or hairs. 



The eggs are broadly oval in outline, 0*4 mm. long by 0*29 

 mm. broad. They are present only in comparatively small 

 numbers, each lamella containing about 100. That is to say, each 

 barnacle produces about 200 eggs at a time. 



Genus Lithotrya, G. B, Sowerby. 



The species of this genus are usually found boring in coral- 

 reefs, among the shells of molluscs or in soft limestone. 



