231 
be added that the upper part of the peduncle in Calantica eos is 
nude, whereas the peduncular skeleton covers the entire peduncle 
in Calantica Mortenseni. A comparison of the males is precluded, 
the male of Calantica eos not being described. — Calantica tri- 
spinosa has an entirely aberrant shape, the apices of the carina, 
terga, and scuta are pointed, prominent, and free, and there is a 
great Space between the rostrum and the rostral latus. These feat¬ 
ures seem to demonstrate with certainty, that the specimens from 
Japan, which Kriiger (1911, p. 11) refers to Calantica trispinosa , 
are not at all identical with Hoek’s species; although Kriiger says 
that „von der ausseren Gestalt (Taf. I, Fig. 1) giebt Hoek im Chal- 
lenger-Report eine genaue Beschreibung, zu der ich nur wenig 
hinzuzuftigen habe“, his photographs (Taf. I, Fig. 1, 1. c.) show 
such differences from Hoek’s drawings and descriptions that the 
identity is almost entirely out of question with our present know- 
ledge. Kriiger’s specimens are evidently much more related to 
Calantica eos or Calantica Mortenseni. His description of the male 
shows, that it has a capitulum skeleton of carina, terga, scuta, and 
rostrum, but no latera; in these features it differs from Calantica 
Mortenseni, so that the identity of the Japanese species remains 
doubtful. — Calantica Kempi (Annandale) 1 ) differs from the 
present species in the presence of a subrostrum, and in the coarsely 
sculptured plates. 
Calantica Mortenseni, owing to the remarkable development of 
its male, occupies a very interesting position among the Scalpel- 
lid ae. The most highly developed males hitherto known in the 
genera Calantica and Smilium have a capitulum skeleton, consisting 
of carina, terga, scuta, and rostrum; in Calantica Mortenseni also 
three pairs of latera are present, and among these, curiously enough 
the upper latus attains a higher development than the others. 
The high development of the male gives evidence that we here 
face a rather primitive species; it stands comparatively near to the 
ancestors of the entire group, which in all probability have had 
separate sexes with equally highly developed males and females. 
The complete organisation of the male in Calantica Mortenseni points 
‘) Scalpellum Kempi Annandale (1911, p. 589), syn. Scalpellnm Pilsbryi 
G r u v e 1 (1912, p. 3). 
