118 AMERICAN HYDR01DS. 



i jilii-nlii I.EVINSEN, Vi.l. Meduel. natnrli. Koren., 1SH2, p. .57. 



n til/ruin Cmwronn, Ann. ami M:t<_' . lilli SIT., XVI, ls'.i. r i, p. 2U1. 

 Tliniiiriii Jiliniln I'XIXXKVIK. Norwegian Ncirtli Atlantic Kxpecl., ISil'.l, p. S4. 

 Tlniiiirin iiliculn WIIITKAVKS, Cat. Marine Invert. Kastern Canaila, 1001, p. 2' 

 i liliniln TOUIIKY, Hy.lroida of 1'arilic Coast. 1H02, p. US. 



Tropkosome. Almost an epitome of A. ithi,'t!iui. Colony attaining ;i height of about 2 

 inches. Main stem straight on proximal unbranched portion, geniculate throughout the rest <>f 

 its extent, divided into fairly regular internodes in the branched portion, each internode bearing a 

 branch and two hydrothecse on one side and a single hydrptheea on the other. Lower portion 

 with long and irregular internodes. Branches often branching again, divided into irregular 

 internodes which usually bear several hydrothecse each. Hydrotheca? more nearly opposite than 

 in A. iiliiitiini^ and not so closely approximated, slender, delicate, bottle-shaped, the proximal 

 portion being gibbous, and the distal one-half to one-third narrowing into a slender recurved 

 neck ending in a round aperture which points almost directly upward and is furnished with a 

 one-flapped operculum attached to the adcauline side. Immediately below the attachment of the 

 operculum is a sharp constriction or indentation of the hydrothecal neck. 



(juniiKoiiu: Gonangia pyriform, with a short, narrow neck ending in a small, round aperture. 

 They are found both on the stem and branches. 



Distribution. New England coast, ('ape Cod to Gulf of St. Lawrence (Yen-ill); Grand 

 Manan (Stimpson); Labrador (Packard); Alaska (Clark); AIln it ><>** Station 2S<>r>. lat. N. -is 12'. 

 long. W. 122 49', 40 fathoms. Great Britain, north of Scotland to Cornwall (Hincks): White 

 Sea (Mereschkowsky); Christiania (Marktanner-Turneretscher); Greenland (Levinsen); North 

 Atlantic (Bonnevie). 



I have not seen this species on our Atlantic coast, although I have examined a great deal of 

 material from that region. If it occurs there it is probably rare. Kirchenpauer ] considers that 

 the specimens from Alaska described by Clark are a distinct variety from the British form. I 

 can see no material difference between the two. The resemblance between this species and ^1. 

 iiliiitiini is so exact in all except size that they would doubtless be regarded as identical, could 

 intergrading specimens be found. Such specimens, however, are not forthcoming, and hence 

 the two species must be held as good. 



ABIETINARIA TRASKI (Torrey). 



(Plate XXXIII, liir*. 6-11.) 

 Si I'lnltirin Irrixki TOKREY, Hyilroids of Paciiie Coast, llKll', p. il'.i. 



Trophosome. Colony attaining a height of about (i inches. Stem straight, thick, not 

 fascicled; lower portion without branches or hydrothec.-e. smooth, divided into irregular, nsuallv 

 long internodes by deep nodes; upper portion with a double row of hydmtheca- and alternate 

 branches, there being three hydrotliecie between adjacent branches on the same side. Branches 

 much more slender than the stem, alternate, with a deep constriction near the base, nodes 

 entirely absent or distant. Ilydrotlieca- alternate, rather distant, short and thick, with subtri- 

 angular bodies and constricted neck ending in an even margin which is flattened on the adcauline 

 side: aperture directed upward; operculum consisting of a single adcauline flap. 



(liiiKiKiinn.- -Gonangia small, ovate, sessile, without ornamentation of anv kind; aperture 

 large, round; no collar. 



Dixti'iliilinii. San Pedro, California (Torrey); Albatross Station 2S<11, lat. N. .M 14', long. 

 W. li".i 50', 1'H4 fathoms; Station L'ST: 1 ,. lat. N. 4s 30', long. W. 124 57', 4<> fathoms; Station 

 I'sstl. lat. N. 4M :>'.', long. W. 124 ;>(.;' :',(>", ."() fathoms; Station 3192, lat. N. ?>;"> :?:',' 4n", long. 

 W. li'l l.V. lol fathoms. 



This species seems quite distinct, the difference in size between stem and branches and the 

 triangular shape of the hydrothcca- being the main diagnostic features. 



Type. In the collection of the rniversity of California. 



(iattnngen unil Arten. Iss4, p. 32. 



