636 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



It is my duty to express my warmest thanks to Prof. Paul Bartsch 

 for his aid in securing for me the privilege to examine this interest- 

 ing collection and for placing at my disposal a series of notes made 

 by him and colored drawings taken while the worms were living. 



ACOTYLEA. 

 Family STYLOCHIDAE. 



Genus CRYPTOPHALLUS Bock. 



1. CRYPTOPHALLUS BARTSCHI, new species. 



Plate 1, fig. 1 ; text figs. 1, 2. 



In the collection there were five specimens which appear to repre- 

 sent a new species. They were found creeping on the reef in 



Fig. 1. — Arrangement op eybspots in Cryptophallus bartschi. 



Tominado Island, Tawi Tawi, in February. The holotype has been 

 given the United States National Museum Cat. No. 19102. 



The body in the living state was elongate-oval in shape and mod- 

 erately firm in texture. In the preserved state it is of a wavy out- 

 line and without any sign of tentacles. Judging from the presence 

 of a group of eyespots in a certain position lateral to the cerebral 

 group of eyes, however, the present species may be provided with 

 a pair of very small tentacles, as is the case with Cryptophallvs 

 wahlbergi Bock 1 . One of the specimens in the living state had a 

 total length of about 65 mm. and a breadth of 25 mm. in the broad- 

 est part of the body. 



The dorsal surface was of a chocolate-brown color, a little darker 

 in the median than in the marginal parts, owing to a touch of dark 

 blue. The extreme margin was white, but the white rim was exceed- 

 ingly narrow. Along the sides of the pharynx were visible the uteri 



1 Bock, 1913, Zool. Bid. f. Uppsala, vol. 2, p. 120. 



