6 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Table 2. — Comparative measurements (in microns) of seven specimens of Loxoso- 

 mella parguerensis, new species (PR 1/5 = holotype) 



Discussion. — Loxosomella parguerensis has a foot comparable in 

 shape and size to that of L. teissieri (Bobin and Prenant, 1953), 

 described from the northeast Atlantic. The latter species, however, 

 is only half the size, bears 8-10 tentacles and possesses two character- 

 istic alae along the sides of the calyx. Another close form, L. sawayi 

 (Marcus, 1939), from Brazil has outstanding rhomboidal foot and 

 eisrht tentacles. 



Loxosomella tedaniae, new species 



Figures 7-10 



Holotype.— USNM 11926 (slide mount). 



Paratypes. — USNM 11926 (on same slide as holotype) and 

 USNM 11927 (alcohol). 



Locality.' — On fire sponges (Tedania ignis) between two and three 

 meters deep, west flank of Church Bay, Harrington Sound, Bermuda. 

 Collected Dec. 25, 1966. 



Description. — Specimens rather large (total size approximately 1 

 mm), blackish brown, and the detritus-filled rectum appearing as a 

 lighter spot at the back. It densely covered the surface of the host 

 sponge, with the result that the flame-red color of the latter could 

 not be recognized. The ratio of calyx length to stalk length is 1:3 in 

 relaxed specimens. Table 3 shows comparative measurements of five 

 specimens. 



The lophophore points forward and bears 12 to 14 long tentacles 

 provided with conspicuous long cilia. The calyx is flattened and almost 

 as wide as high and tapers distinctly in the region of the stomach. 

 The muscular stalk is about as thick as it is wide and has epithelial 

 cells arranged in 12 to 16 longitudinal rows. The fleshy foot is pro- 



