MKDUS.E OF WOODS HOLE REGION. 



57 



Marginal tentacles 4 on adult specimens; younger specimens often with well-developed interradial 

 tentacles, the gradual disappearance oi which is easily traceable in a series of specimens of increasing 

 ages. Nematocysts of tentacles disposed in regular annulations with intermediate perfectly smooth 

 spaces. Manubrium long, extending far beyond the velum; gastric portion rather short and bell- 

 shaped, with slightly quadrate oral lips, beyond which protrudes the pointed gastrostyle. Gonads 

 flat and heart-shaped, and disposed about midway beneath 

 the radial canals. Ontogeny wholly unknown. 



Colors. — Bell quite transparent, gonads and manubrium 

 dull whitish in formalin specimens. 



Distribution. — Region of the Gulf Stream, taken in sur- 

 face t< m. 



GLOSSOCODON Haeckel (1864). 



Glossocodon tenuirostris (L. Agassiz). Text cut. 



Liriopt tenuirostris L. Agassiz, Contributions to Natural History of United 



States, Vol. IV. 1862, 365. 

 Qlossocodon tenuirostris Fewkes, Bulletin Museum Comparative Zoology, 



Vol. IX, 1882, p. 278. Mayer, Bulletin Museum Comparative 



Zoology, Vol. XXXVII, 1900, p. 165. 



Bell somewhat similar to L. scutigera, but more globular; 

 also single broad centripetal canals alternating with the 4 

 radial canals, which are themselves rather wide and prominent. 

 The marginal tentacles present the same aspects of modifica- 

 tion as to number, etc., as in Lirlope ceraMformis, only the 4 

 perradial being permanent in the adult medusa. Manubrium 

 very long and pendulous, extending far beyond the bell mar- 

 gin; mouth 4-lipped, fringed with nematocysts. 



Colors. — Bell transparent, gastric portion of manubrium 

 reddish. 



Distribution. — Chiefly in subtropical waters; reported by Mayer as occasionally taken at Newport. 

 I have not seen this species, the above description being abridged from that of Fewkes. 



THE NARCOMEDUS*. 



So far as I am aware, only two, or at most three, families of this order are represented in this 

 region, and these by very few species. Diagnostic characters of the families are given below, but no 

 keys to the genera will be necessary as in families of larger numbers. 



Glossocodon tenuirostris. Alter Mayer. 



Family CUNANTHID.Ji. 



Wide, pouch-like radial canals, which connect by double peronial canals with the marginal canal. 

 ( itoporpse on the bases of the sensory bodies. 



CUNINA Eschscholtz (1829). 



Cunina discoides Fewkes. 

 ' 'itiiinn discoides Fewkes, Bulletin Museum Comparative Zoology, Vol. VIII, 1881, p. 161. 



Medusa flat, lens-shaped, transparent, with smooth exumbrella. Tentacles 14, stiff, solid, and 

 usually carried at right angles to the vertical line of bell. Manubrium very small or wanting. 

 ( Itocysts located on the lower margin of the collar-like structure called by Fewkes the subumbrella. 



Distribution. — Occasionally found at Newport. This account is condensed from Fewkes's descrip- 

 tion, the medusa being unknown to me. 



