NOTES FROM THE OVVSTON COLLECTION 235 



c — Anal and caudal together composed of 107 rays ; gill-membranes 

 separate, free from the isthmus ; pupil round 



IjIMAIA DOFLE1NI nOV. sp. 



l.l 01 AI A nov. gen. 

 Type : I j imaia do fie ini nov. sp 



Body completely enveloped in a soft gelatinous tissue, partly covered 

 with non-imbricate, extremely thin scales of various size, imbedded on tail, 

 superficial on belly. Head parallelopiped, its length contained nearly 

 1 5- times in that of the trunk; its depth less than that of belly, so 

 that the clavicular symphysis projects above the surface at nearly 

 a right angle Bones of skull firm, but their connection rather loose. 

 Mouth subterminal, not overlapped by the rather high snout. Upper 

 oral border formed by the praemaxillaries only. Maxillary with a 

 supplemental bone Teeth villiform, in a short band near the symphysis 

 of praemaxillaries ; none on the lower jaw, nor on vomer, nor on palatines. 

 Opercular bones hidden under gelatinous skin Gill-membranes separate, 

 free from the isthmus, very thick below so that the number of branchiostegal 

 rays cannot be made out without dissecting. Gill-rakers short, projecting 

 laterally, not interiorly ; their points beset with slender, pointed spinules ; 

 a row of similar protuberances on fifth branchial arch. Eyes of moderate 

 size, with round pupil Nostrils of each side in a level with the upper 

 border of eye : the posterior one obliquely oval, without elevated border, 

 just before the eye ; the anterior ending in a short, anteriorly directed 

 tube Interorbital space with a deep grove, covered with a thick layer of 

 gelatinous tissue and extending forwards to the tip of snout. Lateral line 

 straight along the middle of sides. 



I have named this remarkable genus after Professor Ijima of the Tokyo 

 Imperial University, an assiduous explorer of its habitat, the Sagami-Sea 



Ijhnttia flofleini nov. sp. 



Type-specimen (and the only one known) in the collection of Mr. 

 Alan Owston, Yokohama, bearing the individual number 20402 ; captured 



