418 Annals of the South African Museum. 



ECHINOCUCUMIS TYPICA. 



M. Sars, 1859. Forh. Vid. Selsk. Christiana f. 1858, p. 174. 



There are two small dried specimens of an Ecliinocucumis in the 

 collection which are not unnaturally listed as typica, although the 

 form of the body is somewhat different from that of any examples 

 of t if pica in the M. C. Z. collection. The most noticeable difference 

 is the very short "neck" and caudal regious, but this apparent eli- 

 mination of the terminal prolongations may be due to the drying. 

 At any rate, I find no satisfactory characters by which these speci- 

 mens may be separated from the northern species. The specimens 

 are about 8 9 mm. long by 5 6 mm. thick. 



P.F. 17350. Cape Point N. 86 E., 43 miles, 9001000 fms. 

 Grey mud. 2 specimens; young. 



PSOLUS IMPERFECTUS * Sp. HOV. 



Body nearly cylindrical and truncate at each end in these much 

 contracted specimens, of which the larger is about 9-5 mm. long by 

 5 mm. in diameter, while the smaller is about 8 mm. long by 3'5 mm. 

 in diameter. Color light yellow-brown. The middle of the ventral 

 surface is slightly flattened to form a very imperfect sole, to which 

 the pedicels are completely confined. On each lateral margin of the 

 sole, which is rounded and not at all sharply defined there is a single 

 series of pedicels, 8 in the smaller and 10 in the larger specimen ; 

 the median part of the sole is occupied by a few pedicels, anteriorly 

 and posteriorly but is quite bare centrally ; in the larger specimen, 

 there are about 6 pedicels at the anterior end and 4 behind but in 

 the smaller specimen the numbers are only 4 and 2. The skin of 

 the sole is moderately thick and contains calcareous plates which are 

 rather thick, with rounded margins, and perforated by 20 24 holes. 

 The remainder of the body is covered by large overlapping plates, 

 about half a millimeter across; these plates are covered by a thin 

 epidermis but it is evident that if the animal was dried the plate 

 margins would be conspicuous. The mouth is not dorsal but distinctly 

 anterior and not protected by any special valves; the tentacles are 

 completely retracted in the larger specimen and very much so in 

 the smaller. The anus is distinctly dorsal and around it the plates 

 are smaller than elsewhere. 



* Imperfectus incomplete, in reference to its incomplete approach to the 

 typical Psolus form. 



