344 Miscellaneous. 



lateral band passes in front of and behind the eye, but does 

 not touch the granules encircling the eye, which remain light- 

 coloured. Along the lower third of the lateral region is a 

 regular series of irregular darkish spots or mottlings. Along 

 the middle lateral region passes a narrow light-coloured strip 

 fne from any spots. Under surface very light fawn ; in 

 abdominal region a bluish tinge is present, probably due to 

 the subjacent viscera. Upper and lower labials dark-edged. 



Spec. A. Spec. B. 



millim. millira. 



Total length 79 74 



Head 8 7 



Width of head 5 4-5 



Body 24 23 



Fore limb 8'5 8 



Hind limb 14 13 



Tail 47 44 



].oc. Muldiva, North Queensland. 



The types will be deposited in tlie British Museum. 



MISCELLANEOUS. 



Notes on the Anatomy of Yoldia. — I. 

 By W. K. Brooks and Gilman Drew. 



(Abstract of part of a paper reported to the National Academy of 

 Sciences, April 2.3rd, 1896.) 



In tho year 1874 one of the authors puWished a short paper in 

 the ' Proceedings of the American Association for the Advancement 

 of Science ' calling attention to an organ of special sense in the 

 Lamellibranch Yoldia. This organ consists of an unpaired tentacle 

 which arises from the mantle near the base of the siphons and is 

 apparently tactile in function. 



Since the appearance of this paper many writers on Lamellibranch 

 anatomy have mentioned this organ of special sense, but very little 

 has been added to our knowledge of it. Pelseneer has noted it as 

 occurring on the right side of such specimens of Leda as he has 

 examined *, on the left side of his single specimen of Malletia 

 pallida, and on either the right or left side (but never paired) in 

 Yoldia isonota f. 



* " Contribution a I'etude des Lamellibrauches," tome xi. Archives de 

 Biologie. 



t Rex>^rt on the Anatomy of Deep-sea Mollusc{i, Zool. ' Challeno-er ' 

 Exped. pt. Ixxiv. 



