THE OEPHYREA OF JAP AN. 63 



on the last mentioned organs. The funnels are large, situated 

 close together and borne on short stalks. The specimen is a 

 female and the segmental organ of the right side is filled with 

 ripe eggs. 



The present species seems, as far as I can judge, to be most 

 closely allied to Thalassema diaphanes Sluiter. I regret to say 

 I have been unable to get access to Sluiter's original description 

 of that species.* From what Shipley (34) says of it in his 

 revision of Echiuroids, it seems that the two species agree in 

 having only one pair of segmental organs, in the continuous 

 longitudinal muscle, and in wanting spiral lobes at the internal 

 openings of the segmental organs. But the specimen in my 

 possession shows in other points considerable deviations from 

 Shipley's description {l.c, p. 336 and 346) and figure {I.e., PL 

 XXXIII, 2) of T. diaphanes, which fact has led me to base a 

 new species on it. The most important points of difference 

 consist in the smaller size of the body, and the thicker body- 

 wall in the present species, and in the manner of distribution of 

 the papillae. 



THALASSEMA TiENIOIDES, n. sp. 



A full description, with figures, of this most remarkable new 

 species has been prepared for publication in a separate paper.f 

 Here only the specific characters will be given in brief. 



The species may be said to be of gigantic size, the body 

 proper reaching 40 cm. in length and 2-3 cm. in breadth, while 



* Naturk. Tijsch. Nedorl. Ind., Vol., XLVIII, 1888. 



t " On Three New and Remarkable Species of Echiuroids," soon to appear in this Journal. 



