

554 THE AMERICAN NATURALIST. [Vor. XXXVI. 
medusa by a method. very similar to that of Hybocodon. In 
Staurophora, however, they arise within the greatly folded bor- 
ders of the gonad pouches beneath the radial canals. As in 
the former, no conspicuous differentiation of sex was apparent 
in Staurophora, though not having seen them alive, and not 
having as yet examined the histology of the gonad region, 
this can only be stated tentatively. 
Among medusz taken during midsummer, the more common 
were Nemopsis bachei Ag., very abundant during August ; Bou- 
gainvillia carolinensis Ag., likewise abundant during August ; 
Pennaria tiarella McCr., less abundant than during previous 
seasons; Ectopleura ochracea A. Ag., unusually abundant dur- 
ing August, taken mostly in the evening tow; Luchetlota 
duodecimalis A. Ag., Eucheilota ventricularis McCr., not 
uncommon during August; Eutima limpida A. Ag. fairly 
common, but sexually immature; Lafwa calcarata A. Ag., not 
uncommon, and in many cases the several phases in the devel- 
opment of the medusa were taken. Dipurena comica A. Ag. 
and D. strangulata McCr. were taken, but from a comparison 
the specimens so intergraded as to suggest a probability of 
their specific identity, with only varietal differences. 
Of rarer medusz the following were taken: Willa ornata 
McCr., taken in considerable numbers at various times during 
the summer, were evidently breeding, as medusz of all sizes 
and stages of development were found; Podocoryne carnea 
Sars, taken sparingly; Epenthesis foleata McCr., not numer- 
ous, colors less brilliant than those figured by Mayer for this 
species. Species of Obelia were notably few during the present 
summer, in rather sharp contrast with previous records. It 
is one of the few medusz with a record extending throughout 
the entire year and often occurring in immense numbers, this 
latter being common with many species of Obelia. 
EO. ScYPHOMEDUS#. 
— These medusæ were more than usually abundant during the 
summer, a thing not common at Woods Hole except very 
. early. Many specimens of Aurelia, Cyanea, and Dactylometra 

