The Ceinoids from Dr. S. Bock's Expedition to Japan 10 14. 137 



3'' and 4"' segments the longest ones. L = 2 — 2V2 br. like the pre- 

 ceding ones a little hour-glass-shaped. Antepenultimate segment L= '2 

 br. Opposing spine h = \2 of the br of the segment. Terminal claw 

 nariow. pointed, somewhat curved, as long as the penultimate segment. 



K — s ii = '7 br. 1 Br — s I h = '3 — 1 n br, laterally free, but in 

 close contact by a small, lateral (ubercle, at the middle partly hidden 

 by the synai'thrial tubercle from the axillary. Axillary rhombic, h = br. 

 The lateral angles a little pointed by a small prominence. Arms X, 

 broken, probably between 20 and 30 nun. Bi- — s 1 united on the 

 inside, twice as broad on the outside, medio-laterally narrower by the 

 tubercle from Br 2. Ex. of syzygies: 3+4, 9+10, 14+15 etc. with 

 an interval of 3 oblique articulations. First 10 segments about dis- 

 coidal, then oblique joints. Arms rather smooth. 



Pj 8; 2 mm. ( h' segment short, 2'' one cubical, 3' L= 1' 2 br. 

 4"'— 7"' segment L = 2— 3 X br), P., 7; l,o mm., \\ 8; 2,5 mm., P3 10; 

 4 mm. (The segments somewhat hour-glass-shaped, L = 3 — 4 br), P4 7; 

 2 mm., P5 + 9; 3 mm. Distal p— s about 15: 5 mm. (Longest seg- 

 ments L = 3 — 3 '2 br). 



Disk 3 mm., rather much incised, granulated both IR and inter- 

 bi'achially. Colour: brown. — With some large Myzostomas. 



Sp. 2 (St, 47) Cd rounded, dome-shaped, dorsally papillated. 

 C. + XXV. 11 — 14; 2,5—7 mm. m 2 or 3 whorls, 3'^ — 6* segments the 

 longest, L~ 1 ' 2, 2 and 2V2 X br. Opposing spine h — ^ ^ 3 of the br 

 of the segment, directed obliquely outwards. 



Axillary rhombic, h ^ ^/s br, with a low synarthrial tubercle, 

 located somewhat in front of the tongue-like posterior prominence (the 

 same in sp. 1). Arms X, 35 mm. Syzygies as before. 



P, 9; 2,7 mm. (The L of the segments 3—3 '2 bi'), P, 7; 2 mm., 

 P., 10: 3,r, mm., P3 14; 5,:. mm.. P^ 9; 2,5 mm. Distal p. 10; 5 mm. 

 (Longest segments L — + 4 X br). The genii al glands not very pro- 

 minent. 



Disk smooth, somewhat incised, without gi-anules. Colour: brown. 

 — With Myzostomas. 



Properly speaking, the above-described specimens only differ from 

 D. parvicirra (P. H. Carp.) by (heir smaller proportions. Therefore 1 

 have not separated them as a special variety, though the axillaries 



X.iva A<U IlHg. Soc. S<-. Ups.. Sm,-. 4. Vol. .=>. \:o fi. Impr. " .1 1922. 18 



