only very imperfectly calcified valves in the adult — the younger 
specimens have more extensively calcified plates than the old ones, 
indeed the youngest stages known of both species have completely 
calcified capitulum plates (Fig. 6e.). The young specimen of Scal- 
pellum Stearnsii figured is indeed so different from the adult that 
it might be regarded as a representative of another species, were 
it not for its occurrence; it was found fixed to the stalk of the 
specimen I (from Jolo), which moreover on its right scutum car- 
ries another young, but typical specimen (VII of the table). 
An interesting hint as to the enemies of the barnacles is af- 
forded by the specimen V (from „Hyaton Maru“); a little below 
the middle the carina has a smooth, circular hole like those made 
by Lnnatia in mollusc-valves in Northern waters; the capitulum is 
empty, the animal evidently eaten up by the mollusc. This indic- 
ates that molluscs at all events may be enemies of the barnacles, 
a faet hitherto unknown. 
Scalpellum indieum Hoek. 
25 miles E. to S. of Zamboanga, 200 fathoms 3/III 14. One specimen 
on the nude axis of an anthipatharian. 
21 miles W. Vs S. of Bonomisaki, 220 fathoms. „Hyaton Maru“ 13/V 14. 
One small specimen on Megalasma striatum. 
Menado Bay, 1° 31’ N., 124° 47’ E., 250 fathoms. Captain Christiansen 
12/III 13. Two specimens fixed to the cirri of a crinoid. 
Scalpellum vubrum Hoek. 
Sagami Bay, 80—120 fathoms, sandy bottom. 6—19/VI 14. One specimen. 
Okinose, Sagami Sea, 100 fathoms. 26/VI 14. One specimen. 
In both specimens the capitulum has a length of 9, the ped- 
uncle of 5 mm. In the specimen from Sagami Bay the small rost- 
rum is almost rectangular. 
The species is very nearly related to Scalpellum indieum, and 
it might be a question, whether the occurrence of a rudimentary 
rostrum, and the colour are indeed reliable as specific characters 
in this case. Moreover mueh seems to speak in the direction of 
both species being young Scalpellum Darwini Hoek; this question 
demands doser study. 
