8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Remarks. — This relatively common species is bright red in life, 

 and the female broods its eggs on the dorsal sm-face of the body 

 (Clark, 1901a; Deichmann, 1941). The brooding habit is unknown 

 in other members of the genus. 



Distribution. — L. nutriens is known only from the coast of 

 California, where it ranges from Pacific Grove in the north to the 

 Gulf of Santa Catalina in the south in depths of 0-20 m. Deichmann 

 (1941) examined a specimen of this species labeled "Galapagos Is." 

 but believed that the labeling was erroneous. 



Lissothuria braziliensis (Theel) 



Figures 2a-e 



Psolus braziliensis Theel, 1886b, p. 15, fig. 7. 



Thyonepsolus braziliensis Deichmann, 1930, p. 192, pi. 21 (figs. 1-6). — Clark, 1933, 

 p. 117.— Deichmann, 1954, p. 401. 



Diagnosis. — Dorsal scale covering complete. Deposits of dorsal 

 surface are perforated plates, hourglass-shaped deposits resembling 

 cups, and towers. Deposits of sole are perforated plates, which are 

 smooth but with raised marginal projections. Tentacles with rosettes. 



Material examined.— Museum of Comparative Zoology, Harvard 

 University, no. 348, Porto Seguro, Brazil, 2 specimens (syn types). 



Description. — Larger specimen 32 mm in total length, tentacles 

 expanded. Smaller specimen 14 mm in total length, tentacles 

 retracted. Mouth anterodorsal, anus posterodorsal. Oral aperture 

 surrounded by numerous sharply pointed valves. Tentacles richly 

 branched. Dorsal scales numerous, approximately 8-10 between 

 mouth and anus. No obvious skin overlies scales. (For additional 

 anatomical details, see Theel, 1886, p. 15; Deichmann, 1930, p. 192; 

 and Deichmann, 1954, p. 401.) Sole deposits are plates with 

 irregularly indented edges, around which projections are slightly 

 upraised to give appearance of small knobs (fig. 2b). Rosettes in 

 tentacles not complex (fig. 2e) ; also present in tentacles are perforated 

 plates of two types, and rods. Larger plates of average length 0.47 

 mm are long, broad, with numerous perforations (fig. 2c); smaller 

 plates and rods of average length 0.16 mm are narrow, with few 

 perforations (fig. 2d). Ventral tube feet have w^ell-developed end 

 plates and contain elongate, often curved, perforated supporting rods 

 of average length 0.18 mm (fig. 2a). 



Lectotype. — I select the larger specimen (total length 32 mm) of 

 the two syntypes as the lectotype of this species. 



Remarks. — In possessing rosettes in the tentacles, L. braziliensis 

 falls close to L. antillensis, new species (see below), but it differs from 

 that species in lacking cups in the sole. 



