no.1761. A NEW SPECIES OF <) \<' II 1 1> l< )fsl s BALCII. 17.", 



which widens .-main beyond it. The region is aboul twice as broad 

 as long and is prolonged at its anterior corners into the tentacles 

 while from its anterior face springs the snout or rostrum. 



Tentacles and < yes. ( PI. 22, fig. 1.) The tentacles are thick, fleshy 

 and moderately wrinkled, ending in an abrupt taper. In life they are 

 doubtless somewhat longer and thinner, but the contraction in this 

 specimen does not appear to have been extreme. They curve o-ently 

 outward and upward. Each bears on its external (and slightly supe- 

 rior) surface a large black eye spot, which appears as a lump under the 

 skin, raising the latter into a slight prominence out of which the eye 

 looks forward along the tentacle. In effect the eye is set in the an- 

 terior face of a very rudimentary peduncle or ophthalmophore re- 

 sembling a bracket. On sectioning, the eyes are seen to present no 

 special features, but are well developed and evidently highly func- 

 tional. There is no appearance of any corneal modification of the 

 skin except a slight thinning. The retina is heavily pigmented; the 

 lens large, filling nearly the whole eye cavity. The left tentacle in 

 this specimen bore an appendage branching off from its base and 

 pointing posteriorly along the left side of the neck, nearly as long as 

 the tentacle itself but less than half as thick. This appendage bore 

 on its exterior face an extra eye, or rather, as heretofore mentioned, 

 a cluster of four extra eyes apparently in various stages of prolifera- 

 tion one from another. Undoubtedly the whole structure (neglect- 

 ing the feature of the apparent proliferation of eves in the extra 

 eye spot) is to be interpreted as a case of bifid left tentacle somewhat 

 masked by the turning backward of the external member and its 

 reduction in size and change in proportions. If this member were 

 turned forward and thickened and curved like the normal tentacle, 

 it and its eye spot would bear the relation of a mirror image to the 

 normal tentacle and its eye spot, as is commonly the case with similar 

 bifid structures." 



Hostrnm and mouth. — ( PI. 22, figs. 1 , 2, 3.) From the anterior Face 

 of (behead region, and from under a fold of skin connecting the bases 

 of the tentacles, springs the thick and heavy rostrum in the shape of 

 a truncated cone about once and a half as long as broad. It is only 

 moderately wrinkled and, like the tentacles, is in life probably some 

 what but not greal ly more prot rusible. I f may probably be also some- 

 what more contractible but not greatly. The thick and hea\\ skin 

 and the rather slight musculature which appear on dissection do not 

 point to anextremely elastic or contractile organ. Its anterior end 

 forms a flat lace of oval form, the major axis dorso-ventral. In this 

 axis the mouth appears as a simple slit two-thirds the length of the 

 oval, with wrinkled lips. Unless the rostrum is much more change- 

 able in form than above supposed it differs markedly from the other 

 species of the genus, where ii is bulbous. Doubtless the pharyngeal 



<* See cases collected in BateBon [1894] 



