378 bulletin: museum of comparative zoology. 



radial canals, in their union ^dth the manubrium, show no trace of the 

 enlargements, or so called "mesenteries" characteristic of other 

 species of Calycopsis (Hartlaub, 1913, p. 347). And it is further 

 characterized by the prickly, or warty, nature of the marginal lobes of 

 the exumbrella between the tentacles (Vanhoffen, 1912b, p. 364). 

 The series of Calycopsis in the present collection has similar exumbrella 

 sculpture, in the form of rows of high, conical, gelatinous prominences, 

 on the marginal lobes. And as nothing comparable occurs in any 

 Calycopsis which I have seen, either in life or after preservation (1909a, 

 1909b, 1913, 1917), or is recorded, except for C. valdiviae, it separates 

 the new species, C. papiUata, from all members of the genus, except the 

 latter. It is sufficiently distinguished from C. valdiviae by the presence 

 of well-developed "mesenteries"; by the small number of centripetal 

 canals, and especially by the fact that some of the latter join the manu- 

 brium, some the radials (p. 377) ; in fact, this character alone would 

 separate it from all specimens of the genus yet described. But it is by 

 no means impossible that a similar type of canal-union may take place 

 in other species, though it has not actually been observed. Calycopsis 

 pjapillata is further distinguished from its relatives as follows : — 

 from C. nematophora, by the smooth lip; by equal numbers of tentacles 

 and canals; from C. borchgrevinki, C. bigelowi, and C. chimi, by equal 

 numbers of canals and tentacles; from C. iypa, by much smaller manu- 

 brium, narrow sexual folds, and small number of canals and tentacles; 

 from C. geometrica, by small number of tentacles and canals. 



Calycopsis papillata, sp. nov. 



Plate 2, fig. 1-7; Plate 3, fig. 1. 



Station 



10,206, 75-0 meters, 1 spec. 27 mm. high by 26 mm. broad. Type. 

 10,196, surface 2 " respectively, 18 mm. broad by 18 mm. 



high, and 11 mm. by 11 mm. 



All are in good condition. 



In all these specimens the bell is dome shaped, the gelatinous sub- 

 stance thick and notably rigid, with the deep bell-cavity characteristic 

 of this genus (Plate 3, fig. 1). The type, and the 18 mm. specimen, are 

 both somewhat flattened laterally, but inasmuch as the compression 

 is interradial in the former, radial in the latter, while the small speci- 

 men is not flattened at all, the flattening is apparently no more signifi- 



