HARGITT. 



accept it and to propose for the species under consideration the 

 name Aglantlia conica the specific name designating the some- 

 what typical cone shape of the medusa. 



The following specific diagnosis briefly summarizes the more 

 distinctive characters of the medusa : Bell high with rather 

 sharp apical projection slightly constricted just above the bell 

 cavity. Manubrium long and with elongate gelatinous peduncle ; 

 gastric region only about one fourth as long as the former 

 and with prominent four-lobed lips, the whole organ about 

 three fourths as long as the bell cavity. Radial canals eight, 

 extending the length of the peduncle. Gonads eight, cylindrical 

 and suspended from the upper portion of the bell cavity under 

 the canals. Velum well developed and apparently strongly 

 functional as the organ of locomotion ; movements of the 

 medusa active and erratic, darting arrow-like when disturbed ; 

 bell walls thin with tendency to wrinkle longitudinally when 

 placed in formalin. Tentacles apparently numerous, though 

 mostly lacking, only the bases generally distinguishable ; those 

 present were short and rather blunt. No marginal organs or 

 otocysts distinguishable. 



The specimens were taken with the open tow-net at a depth of 

 from twelve to sixteen fathoms. Many of the specimens were 

 sexually mature, some females discharging eggs. Both sexes 

 apparently present and in about equal numbers. 



These observations would seem in the main to confirm the 

 earlier records of Stimpson, Agassiz, Verrill, Packard and others 

 that the point of Cape Cod marks a limit more or less definite, 

 between a boreal, or "Acadian," and a " Virginian " fauna which 

 pertains to not only ccelenterate life but to a considerable range 

 of invertebrates. Undoubtedly the configuration of the coast line 

 and its associated topography in their influence on the various 

 currents are important factors in the faunal ranges which are 

 under consideration. 



In this connection may be discussed another point to which 

 previous reference has been made, namely, the varying depths 

 from which our hauls were made. I regret to say that the nets 

 were only of the ordinary open sort, which therefore precludes 

 anything like exact data, but the repetition of hauls at the same 



