ON THE FAUNA OP JAPAN 133 



extending from KyuRlm to the Boso peniiLsula. Gypraea, tliougli 

 flourisliing in the southern zone, is found to extend nortliwards to the 

 Boso peninsula. Of ce])halopods tlie following species are sometimes 

 met with : Onyclioteuihis hanksU, Ahralia andamanica, Stenofenfhls 

 hnrtrconi, SympJectotentliis ovaJcmiensis, GhiroteutJus imperotor, and 

 several species of Loligo and Sepia. Many of them extends northwards 

 up to the middle zone, or beyond. 



A large numher of worms have hitherto been recorded froui this 

 zone, of which we find the following forms ; Cleloeia flora, Nereis 

 mictodonta, etc. amongst polychaetes; Fhymo-soma antillarum, Sipuncuhis 

 cuma.nensis, Af^pidosiplion trnncaius, Dendrostoma. hladum, BoneUio, 

 minor, etc. amongst gephyreans ; Pseudoceros lacteus, Prostheceraeus 

 onelear/rinus, etc. amongst planarians. Fome of them are found to extend 

 farther north. 



Banging from off the Goto group to the Kumano Sea is a famous 

 coral -bed, where we have such forms as GoraUium, jajponicum, G. elatius, 

 G. honojoi, and G. imdile. ^J'he first two corals are also found forming 

 a l)ed in the waters near the Benin group, as well as north to Formosa. 



The jelly-fishes are numerous and varied, representing many genera, 

 most of which are of wide distribution. Some common species are 

 Mastigias pa.pva, 31. oceUata, Snnderia malaeyensis, Gharyhdea spp., 

 Phopilema esculenta, Ph. Ivif^pidimn, etc. Of these some species make 

 their appearance in the middle zone. Near the coast of Kyushu occur 

 in much abundance Eh. esculenia, and Ph. hif^pidimn, which attain a 

 large size and are eaten largely in this country. In this district we 

 find a number of hydroids, such as Synthecimn tuhithecum, SertulareUa. 

 sinensis, Pycnotheca mirahilis, Uemicarpits pennariits, etc. 



The S[)onges are very rich and varied, of which some interesting 

 siliceous forms are Semperelkt schultzei, Hyalonema aperhim. Evrtte 

 schmidfi, UexactineUa ventHohrmn, etc. Most of them extend north- 

 wards u.p to the Sagami Sea. The sponge of some commercial value is 

 represented by Enspongia. irregularis, which abounds in the southern 

 seas. 



The Inland Sea is zoologically an interesting body of water and 

 bounds in a sense with southern fauna, though containing some nortli- 

 ern types of animals. Its shores command a very rich littoral fauna. 

 It is the breeding ground of many kinds of fishes (e. g. Pagrosom?(s 

 major, etc.), which enter from the two channels and spawn in about 

 t]ie middle of the Sea. Certain experiments with a view to tlio 



