78 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i05 



Planocera olygoglena Lang, 1884, p. 444. 



Planocera amphibola Lang, 1884, p. 444. 



Planocera discus, Willej^ 1897, p. 155. 



Paraplanocera laidlawi Jacubowa, 1906, p. 115. 



Paraplanocera discus Bock, 1913, p. 246. 



Paraplanocera oligoglena Stummer-Traunfels, 1933, p. 3487. 



Material: One specimen collected by S. F. MacNeil on a reef 

 flat, Kwajalein Atoll, South Loi Island, Marshall Islands, no date. 



Whole mount features: The specimen is broadly oval, 18 mm. 

 long and 16 mm. wide. The copulatory apparatus as seen in the 

 whole mount is shown in figure 4,c. This agrees with the copulatory 

 apparatus of P. oligoglena except that in addition to the two large 

 teeth in the cirrus sac characteristic of this species there are two 

 additional smaller teeth. Puzzlmg coils were further seen in the 

 copulatory bursa. It was therefore thought necessary to section the 

 copulatory apparatus. This showed complete agreement with 

 oligoglena in all details, apart from the extra teeth in the cirrus sac; 

 the coils in the bursa were found to be those of the right spermiducal 

 vesicle that had somehow got pushed mto the bursa. As I have 

 recently described this species in great detail (Hyman, 1953), further 

 description here appears superfluous. 



Specimen: The specimen as whole mount minus the copulatory 

 apparatus and serial sections of the copulatory apparatus (seven 

 slides) have been returned to the U. S. National Museum. 



Remarks: Paraplanocera oligoglena is cosmopolitan in Indo- 

 Pacific tropical and subtropical waters. It has been recorded from 

 Ceylon, New Britain, New Caledonia, Gulf of California, Hawaii 

 (Hyman, 1954), and now from the Marshall Islands. Records from 

 several other places in the Indian and Pacific Oceans are given by 

 Prudhoe (1945), but some uncertainty exists as to the specific identi- 

 fication and the number of valid species of the genus. No species of 

 the genus has been taken in the Atlantic Ocean. 



Suborder COTYLEA 

 Family Pseudoceridae Lang, 1884 

 Genus Pseudoceros Lang, 1884 

 Pseudoceros micronesiantis, new species 



Figure 5 



Material: This species is represented by two specimens — a larger 

 one taken by P. E. Cloud in a lagoon near Managaha Island, west of 

 Saipan, June 20, 1949, and a smaller one collected by A. H. Banner, 

 at Onotoa Atoll, Gilbert Islands, July 29, 1951. 



