694 



durch die Analöifnung in die Öffnung der Harnblase übergeht und 

 von hier aus in die Harnleiter gelangt. Was den Entwicklungszeit- 

 raum des D. folium^ vom Beginn seines Eintritts in den Darm bis zur 

 Bildung fertiger Eier anbelangt, so kann ich vorläufig nur behaupten, 

 daß hierzu mehr als zwei Wochen erforderlich sind. 



5. A Rare Shark, Rhinodon pentalineatus n. sp. 



By Kamakichi Kishinouye, Imperial Fisheries Bureau, Tokyo. 

 (With 2 figs.) 



eingeg. 22. August 1901. 



On lOth June 1901 a rare and gigantic shark was caught by 

 drift net off Cape Inubo. Mr. Tsuratame Oseko who keeps a collection 

 of rare things for show in Asakusa Park, Tokyo, bought the fish and 

 brought its skin to Tokyo to be stuffed, not withstanding many diffi- 

 culties, accompanying its enormous size and ponderous weight. The 



Fig. 1. 



Fig. 2. 



external part is complete, except the portion between the anal fin and 



the caudal. 



The general appearance of the fish is very ugly, with the flat and 



blunt head, straight, terminal mouth and the small eyes. The skin is 



fine-grained, except five longitudinal smooth bands one dorsal median 



and two pairs lateral. The ventral lateral band seems to be continuous 



to the kiel on each side of the tail (fig. 1). 



The eyes very small, situated at the 

 sides of the head near the margin of the 

 colored portion of the head. The nictitating 

 membrane wanting. The spiracles are 

 nearly the same in size and are on the 

 same level, with the eyes. The nostrils are 



at the anterior extremity of the head. They open at thelabial boundary 



of the mouth. 



The mouth is nearly straight and opens at the anterior extremity 



of the head too. A labial fold from the nostril to the corner of the 



