The ?iatural History of the Frilled Shar}{ 



251 



able that the publication of Nishikawa's paper on Chlamydoselachus turned Dean's atten- 

 tion to this primitive shark and led him to go to Japan to study the fish. 



Dean's notes do not clearly indicate when all his specimens were taken, but for- 

 tunately Mrs. Dean was with him in Japan, and she tells us that they were at Misaki 

 (on the peninsula between Sagami and Tokyo Bays) from July to October 1900, and from 

 March to July 1901. They were not there all the time; some months they were in resi- 

 dence continuously, some months intermittently. In 1905, they were again at Misaki, 

 from June to October, not steadily, but for the most part as on the first trip. Furthermore, 

 fishing for Chlamydoselachus was carried on for Dean during his absences; thus in 1902, 

 1903, 1905 and 1906, as we ascertain from his notes. 



Two articles by Dean, describing his first visit to Japan, cast Hght upon his methods 

 of obtaining this rare material. In the second (1904), he speaks thus: "Happily, too, the 

 collector of the station [Misaki], Kuma Aoki, is an ex-fisherman, for, knowing the towns- 

 people, he serves as a diplomat, suggesting regions which should be fished, and often ac- 

 companying the expeditions." Further on he speaks of Kuma's remarkable knowledge of 

 the fishing grounds. In the earlier article (1901), he speaks of Misaki as an excellent 

 fishing ground for Chlamydoselachus, and then he concludes: "Professor Mitsukuri 



Text-figure 3 

 A map of the Sagami Sea, the Miura Peninsula, and part of the Gulf of Tokyo, showing the position of the 

 Misaki Laboratory in which Doctor Dean worked, and the waters from which his specimens of 



Chlamydoselachus were obtained. 

 From an old chart compiled by Prof. I. Ijama. 



