BARBADOS-ANTIGUA REPORTS 49 
At a meeting of the Royal Society of Edinburgh held on 
June 4, 1877, Professor Sir C. Wyville Thomson discussed the 
structure and relationships of the genus Holopus, basing his re- 
marks upon a specimen loaned him by Sir Rawson W. Rawson.® 
Sir Wyville states that a second specimen in the collection of 
Governor Rawson had been lent by him to Professor Louis 
Agassiz at the time of the visit of the ‘‘Hassler’’ to Barbados; 
and that Professor Agassiz intended to publish a full descrip- 
tion of the specimen, but was prevented from so doing by fail- 
ing health, and after his death the figures which he had pre- 
pared were published by his son Alexander Agassiz, with a 
short note by Court Pourtalés, in the Zoological Results of the 
**Hassler’’ expedition. 
This second specimen is evidently the one of which a figure 
was published by Gray, who, however, never saw it, and which 
was described in detail by Pourtalés in connection with the 
figures by Konopicky. Gray gives the depth of the habitat as 
5 fathoms, while Pourtalés says it was brought up from deep 
water. But Sir Rawson states that while at first he believed it 
to have come from deep water, he later found that it actually 
eame from shallow water. 
Sir Wyville says that during the last few years (preceding 
1877) three specimens of Holopus rangivi had fallen into Sir 
Rawson Rawson’s hands. All were brought up on fishermen’s 
lines from deep water off Barbados. One is very complete in 
all important parts, wanting only the two bivial arms, but re- 
taining the orals. The second is a little larger; it lacks the 
orals and the bivial arms. With Sir Rawson’s permission he 
boiled this specimen down in order to figure and describe the 
separate parts. The third specimen is quite perfect, but very 
young, only 8 mm. in height. 
Besides these three specimens, of which the first is evidently 
the one mentioned in the letter from Governor Rawson to Dr. 
Gray and subsequently loaned to Professor Agassiz, Sir Wyville 
knew of only one other; this was shown at the Philadelphia 
Exhibition, and was afterwards purchased by the Museum of 
Comparative Zoology. 
Sir Wyville believed that the column, or ‘‘tube-like body 
5 Proc. Roy. Soc. Edinburgh, IX (1876-77), p. 405. 
