267 
their external characters much more agree with the characters em- 
phasized by Gru vel (1. c.) for Lepas anserifera. Especially the oc- 
cludent margin in most cases is broadly curved, and separated by 
a rather broad area from the umbo-apical line. Many of the spec- 
imens agree in characters with Lepas denticulata Gru vel; this 
species is evidently based on young specimens apparently very closely 
related to the forma squamosa of Lepas pectinata, and cannot be 
kept up as a separate species, according to the dates hitherto known. 
To settie the identity I investigated the animals somewhat 
doser. Now, informations in detail concerning the mouth feet could 
not be obtained. On the other hånd, statements about the number 
of filamentary appendages could be found; they are, indeed, not 
exhilarant: Darwin (1852) records, that the animal has none or 
one filament on each side of the prosoma, Gru vel (1905), on the 
other hånd, speaks of none to one pair on each side, and Annan- 
dale (1909) is inclined to believe that Darwin is right! My spec¬ 
imens indicate that Gru vel nevertheless is right; the number of 
filamentary appendages on each side of the prosoma varies from 
none to one pair. Lepas anserifera, on the other hånd, has five 
or six appendages on each side, although the posterior one of them 
may be rather rudimentary as Darwin, and Annandale have found. 
According to the filamentary appendages, the specimens from 
the „Endeavour" must also be referred to Lepas pectinata. Their 
mouth feet are interesting (Fig. 26): The mand i ble has five teeth 
of which the upper (first) is much larger than the others, owing to 
the deep excavation between the first and second tooth; the upper 
edge of each tooth is finely pectinate, the lower is shorter, straight, 
and smooth. The lower angle of the mandible is rounded, and 
strongly pectinate. The maxi 11a has the characteristic, terraced ap- 
pearance of the genus; the upper spines are only little prominent; 
there are three excavations, and indications of a fourth near the 
inferior angle; the angle is rounded. The maxilla is rather scantily 
furnished with smaller hairs, and these latter are mostly situated 
near the cutting edge. 
In the material from the „Endeavour* complete series were 
present of the stages from the only just fixed pupa with no trace 
of skeletonal plates whatever to the outgrown barnacle. 
