The Schizopoda collected by the Maia and Puritan in the Mediterranea. 137 
22. Leptomysis, sp. ? 
The specimens are ali small and in veiy indifferent conditiou 
so that the species to whicb they should be referred, cannot be 
determined with any satisfaction. The dermis in ali the specimens 
is hispid and the telson shaped more as in L. gracilis than in any 
of the other species. 
L. gracilis has not, so far as I am aware, been recorded from 
the Mediterranean but it is not advisable to admit the species to 
the list on the evidence of these specimens. 
Calyptomma gen. nov. 
Eyes in the form of an ocular lamina resembling somewhat that 
of the genus Pseudomma, partly hidden by the vaulted form of the 
carapace; lamina without any indication of median cleft, absolutely 
contiguous, produced in front into 2 short pointed processes; visual 
Clements rudimentary. 
Antennal scale very short and narro w, outer marg-in entire, 
terminating in a strong spine beyond which the apex of the scale 
is not produced. 
Telson long and narrow, entire, armed distally with few simple 
spines, median setae absent. i., 2. and 3. pleopods in the male 
simple and rudimentary as in the female; 4. and 5. pleopods elon- 
gate but each apparently consisting of a single branch which is 
uni-articulate; the 4. pleopod longer than the 5., terminating in a 
long stout curved seta. 
The raouth parts and such thoracic legs as remain on any of 
the specimens present no distinctive features but on the whole re- 
semble those of the genera Pseudomma and Ämblyops. This genus 
has the superficial aspect of a small and slender Pseudomma but 
the curious condition of the male pleopods at once separates it from 
ali other genera of Mysidae know to me. It does not fall within 
any of the sub-families of Mysidae as at present defined and it is 
necessary to Institute a new sub-family, which may be called the 
Calyptomminae for its reception. 
This sub-family may be defined as follows: 
Calyptomminae, sub-fam. nov. Males having the 1., 2. and 3. 
pleopods rudimentary as in the female, the 4. and 5. pleopods 
elongate, consting of a single uni-articulate ramus. — Other characters 
as in the Leptomysinae. 
The sub-family would appear to havc a naturai place quite 
