84 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 9i 



an elongated pedicel and it may be duplicated in series; then from 

 the distal end, or near it, of the main pedicel, an internode is given 

 off that looks like an internode of the main stem, and from this the 

 branch continues in the same way that the stem does. 



Goiwsoine. — Male gonangia arise from the base of the hydrophore 

 pedicels, just beyond where they leave the internodes ; they are broadly 

 obovate in the one direction and almost flat in the other; there is a 

 short but distinct pedicel present ; at the distal end the gonangium has 

 a small, but distinct, semicircular notch. 



7Vpe.— U.S.N.M. No. 22922. Taken by the United States Fisheries 

 steamer Albatross at station 2572, latitude 40°29' N., longitude 66°04' 

 W., off Cape Sable, 1,769 fathoms, September 2, 1885. 



Re77iarks. — It is with some misgivings that I describe this as a new 

 species, since there is so much resemblance to H. telescopictmi Allman, 

 as described and figured by Allman - and by Jaderholm,^ and yet the 

 specimen from which this species is described has not the characteristic 

 that these authors, and Pictet and Bedot * as well, consider definitely 

 distinctive, i. e., the number of the reduplications of the hydrophore, 

 to form a series with many more units than are exhibited in any other 

 species. One might surmise that this excessive reduplication was due 

 to some seasonal or environmental condition, were it not that the same 

 type of structure appeared in such distant locations. The distribution 

 itself is indeed remarkable. Allman described it originallj^ from off 

 Port Jackson, NSW., in 30-35 fathoms. Then Pictet and Bedot re- 

 ported it from the Gulf of Gascogny in 155-180 meters, and later 

 Jaderholm reported it from the Bering Sea in 131 meters. 



Apart from the matter of reduplication, the only other character 

 that is noticeably different is the gonangium, or rather the semicircular 

 notch at the distal end of this, and this is quite a minor difference. 

 The female has not been reported in any instance. 



HALECIUM TENSUM, new species 



Plate 17, Figuee 11 



Trophosome. — Colony rather rigid, with a main axis (5 cm.) and a 

 few irregularly arranged branches, the proximal being almost as long 

 as the main axis and the others becoming shorter as they get farther 

 from the base; proximal portion of the main stem and of some of the 

 branches, fascicled; there is little indication of nodes on stems or 

 branches. Each portion of a stem or branch that corresponds to an 



* Allman, G. J., Report on the Hydroida. Challenger Expedition, vol. 23, pt. 70, p. 10, 

 1888. 



* jaderholm, E., Der Hydroidenfauna des Beeringsmeeres. Archiv fOr Zool., vol. 4, No. 8, 

 p. 4, 1907. 



* Pictet, C. and Bedot, M., Hvdraires provenant des Campasrnes de L'Hirondelle (1886- 

 188S), p. 7, 1900. 



