48 AE.T, TT. — A. TZUTxA : 



go (!) ; Sliiokiibi in Prov. Osliima, Hokkaido (Mr. N. Yanagt) ; 

 Trotia Padi, Chepissani and Lake Bousset in Sakhalin (Prof. J. 

 Ijima). 



Bemarl^s : —This species occurs all along the eastern and 

 western coasts of Japan from Sakhalin to Kyushiu. I have 

 found no marked differeîice in size according to the latitudes. 

 Thus a southern example (from Kyushiu) measured 27 mm. in 

 length and 4 mm. in breadth, while a northern example brought 

 back by Prof. I. Ijtma from Tretia Padi (Sakhalin) measured 30 

 mm. and 4 mm. respectively. An example from the Gulf of Mi- 

 yazu (.Japan Sea) measured 20 mm. in IcTigth and 3 mm. in 

 breadth. The largest specimen obtained near the Misaki Marine 

 Laboratory was 27 mm. long and 4 mm. broad. 



hi the Gulf of Miyazu, where, as on the Japan Sea coast 

 generally, the ebb and flow of tide is not considerable, the species 

 can be collected from among algae or from stoTies brought up 

 from a depth of a metre or two. In Misaki it occurs abundantly 

 under stones and among the oel-grass, algae, etc., near the low 

 water mark. 



The species is very active and restless when disturbed, and 

 when taken on haîid, it wrio-ales about violentlv, shedding ofl' 

 the elytra and frequently even breaking up into fragments. It is 

 a rather difficult matter to keep the worm alive in confinement. 

 Under circumstances it swims making an undulatory motion with 

 the body, but soon sinks to the bottom. 



In the montb.s of March aud April are commonly met with 

 individuals with masses of eggs under elytra. The eggs are of a 

 slightly pinkish colour and are agglutinated together by a trans- 

 parent mucous secretion, so that they do not readily fall off. In 

 PI, \[, fig. 1 is shown a female specimen whicli was obtained in 



