AGASSIZ: LETTERS TO THE HON. GEORGE M. BOWERS. 69 



Among tlio Tintiunidao were a number of Sticholonche ; among the 

 Acantheriae were specially to be noticed Acanthometra, Acanthostaurus, 

 Amphilonche, Collozoum, Thalassicola, and a number of Chirospira 

 murrayana, and a few Challengeridae. 



Our trawls brought up from the bottom many interesting fishes, among 

 which I may mention Bathypterois, Ipnops, a few bat fishes, all species 

 thus far described by Mr. Garmau from the 1891 Expedition. I may 

 also mention a Chimaera, different from the Chili species. The fish 

 have been admirably cared for by Dr. J. C. Thompson, U. S. N. 

 Among the Crustacea : Lithodes, Munidopsis, and many Macrurans, all 

 well-known species of the 1891 Expedition. We found a few Mollusks, 

 and a few interesting genera of tubicolous Annelids. Compared to the 

 1891 Expedition, few starfishes and brittle stars were obtained, and still 

 fewer sea urchins, only one species of Aceste and one of Aeropo, a 

 marked contrast to the numerous Echini collected in the Panamic 

 basin m 1891. We obtained, however, a magnificent collection of 

 Holothurians ; nearly every species occurring in the Panamic basin be- 

 ing found in numbers in our track south of the Galapagos, in the wake 

 of the great Chilean- Peruvian current and at considerable depths. On 

 one occasion, at Station 4647, in 2005 fathoms, we obtained no less than 

 16 species of Holothurians, among them brilliantly colored Benthodytes, 

 Psychropotes, Scotoplanes, Euphronides, and the like. At Station 

 4670, in 3209 fathoms, we obtained 6 species of Holothurians. At 

 Station 4672, in 2845 fathoms we also obtained very many specimens of 

 three species of Ankyroderma, a large Deima, 2 species of Scotoplanes, 

 2 of Psychropotes, with a number of young stages of that genus ; re- 

 peating thus the experience of the "Challenger," which found Holothurians 

 in abundance at great depth, not only in the number of specimens, but 

 also of species, though the " Challenger " did not at any locality obtain as 

 many as we did at Station 4647. Mr. Westergren made a number of 

 colored sketches of the species which were not obtained in the 1891 

 Expedition. We also collected in the trawl a number of deep-sea 

 Actinians, none ditferent, however, from genera found previously in the 

 Panamic district. We also obtained a few Pennatulids, Gorgonians, and 

 Antipathes, and a very considerable number of siliceous Sponges, usually 

 associated with the Holothurians found in deep water in the track of tlie 

 Peruvian current. In the track of the current at not too great distances 

 from the coast we invariably brought, even from very considerable 

 depths, sticks and twigs and fragments of vegetable matter. On two oc- 

 casions we brought up in the trawl specimens of Octacnemus. The 



