The Schizopoda collected by the Maia and Puritan in the Mediterranean. 127 
rected scythe-like spine. I am not aware that this ventral armature 
has previously been noted in Lophogaster. I bave observed similar 
spines on the first 5 abdominal Segments in the female but they 
appeared to be absent from the thorax of that sex. This, indeed, 
is what might have been expected since they would obvionsly be 
seriously in the way of the young during their development and 
life in the brood pouch. The absence of the spine from the 8. 
thoracic segment of the present male specimen may be due to 
accident but it also may have some significance from the fact that 
the male genital duets have their openings on the appendages of 
this segment. I have not had an opportunity of examining further 
male specimens with reference to this point. ■ — The small specimen 
of this Speeles, from St. 43, 1901, measuring 7 mm, has ali the 
characters of the fully grown animai wìih the exception that the 
margins of the rostral piate are pectinate instead of smooth. This 
is a larvai character, associated with the early pelagic life of the 
Speeles and apparently disappearing when the animai takes up 
its abode permanently on the bottom. It affords an interesting 
parallel with the Calyptopis larvae of many Euphausians, in which 
the rostral piate is similarly pectinate but in the later stages the 
pectinations are lost in ali species with the exception of Euphausia 
schotti Ortmann (1893) where they appear to persist in the adult. 
The present small Mediterranean example has 6 teeth on the 
antennal scale in addition to the strong terminal spine, 3 spines on 
the lateral margins of the telson and 4 teeth on the apex of the 
telson between the strong lateral spines. 
Family Mysidae. 
14. JErythrops elegans G. 0. Sars. 
E. goesii^ Lo Bianco (1903 ; nec Gl. 0. Sars, 1870). 
I am unable to agree with Dr. Lo Bianco in assigning these 
specimens to E. goesii. They appear to be indistinguishable from 
E. elegans. They differ from E. goesii in having the spines at the 
apex of the telson more nearly subequal in length and also in the 
fact that the inner margin of the inner uropod is minutely serru- 
lated. Sars has noted this latter character in 3 of the species of 
Erythrops and it is reasonable to suppose that if it had been present 
in E. goesii it would not have escaped bis attention. It is true, Holt 
and Beaumont (1900) have shown that, in E. ^ serrata^ the serru- 
lations on the inner uropod are eharacteristic of females and imma- 
