Oatty Marine Laboratory, St. A)idrews. 129 



Moreover, in every segment in the more posterior region 

 an aperture exists about the upper end of the ventral row of 

 hooks, and out of this a small branchia projects. Some are 

 included until pressure is made on the body, and then they 

 are distinct. These apertures are at a higher level, for 

 instance, than those of the ' Challenger' form, Station 233 B, 

 which are at each edge of the flattened ventral surface and 

 liave an elongated glandular fillet above them. The position 

 of the branchise thus corresponds with the description and 

 figure of Olaparede"^ from specimens procured at Port 

 Vendres. 



In the intestine of the middle region are many ovoid 

 masses of mud as in Ch(stopterus. These consisted for the 

 most part of very fine amorphous mud of a pale brown colour, 

 with a few sand-particles, a few minute fragments of sponge-? 

 spicules, but very few traces of softer tissue. 



The specimen appeared to be a female with small ova iu 

 the perivisceral cavity. 



In an example from Concarneau, De St. Joseph f found 

 the branchiae covered with Rhabdostyla arenicolcB, Fabre 

 Domergue. 



A fragment of the middle region of what appears to be a 

 Dasybranchus was dredged in the * Porcupine ' Expedition 

 of 1870, off Cape Sagres, in 45 fathoms. The hooks agree 

 with those of JJ. caducus, 



EXPLANATION OF THE PLATES. 



Plate IV. 



Photograph of the white porpoise by A. W. Brown. 



Plate V.J 



Fig. 1. Enlarged view of the head and anterior region of Eteone depressa, 



Malmgren, from the dorsum. 

 Fig. 2. Similar view of the tip of the tail after preservation, supplemented 



by a sketch by Mr. Arnold Watson, 

 Fig. 3. Lateral view of a foot from the anterior third of the body. 



X about 60 diam. 

 Fig. 4. Bristle of the same species after preservation. X Zeiss oc. 2, 



obj. F. 

 Fig. 5. Another bristle turned so as to show the serrations at the tip of 



the shaft, x Zeiss oc. 4, obj. C. 



* Glanures Zoot. p. 56, pi. viii. fig. 8. 

 t Ann. So. Nat. 8^ s6r. v. p. 391. 



X I have to thank the Carnegie Trust for artistic aid with this 

 Plate. 



Ann. & Mag. N. Hist, Ser. 8, Vol, x. 9 



