8 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



Family Campanulinidae 



Genus THYROSCYPHUS 

 Thyroscyphus intermedius Congdon 



Thyroscyphus intermedius Congdon, Bermuda Hyd., 1907, p. 482. 



Fraser, Atlantic Hyd., 1944, p. 181. 

 Distribution. — 8 miles southwest of San Nicolaas Bay, Aruba Island, 

 23-24 fathoms. 



Family Halecidae 



Genus ENDOTHEGIUM 



Endothecium paucinodum, new species 



Plate 1, Fig. 4a ; Plate 2, Fig. 4b-d 



Trophosome. — (The description of the trophosome was taken from 

 a specimen obtained in the Eastern Pacific, west northwest of Anacapa 

 Island, Southern California, in 41-43 fathoms). A colony, 6 cm, is made 

 up of a coarse, fascicled stem, with a few primaiy branches, also coarse 

 and fascicled, although not so heavy as the main stem; the secondary 

 branches are more numerous but they are irregularly arranged, with an 

 approach to alternation. The internodes, or the corresponding portions 

 of the stem or branch, are relatively short. The hydrophores are pedicel- 

 late, but the proximal portion is adherent to the stem or branch; the 

 pedicel gradually increases in diameter to the slightly flaring margin. In 

 some instances duplication takes place. 



Gonosome. — The gonangia arise from the hydrophores on the simple 

 portion of the branches, or on the distal part of the fascicled stem, where 

 the tubes are reduced to 2 or 3. They are long, up to 2 mm, cuneate in 

 longitudinal section, 0.5 mm in the broadest portion; the distal end is 

 but slightly rounded ; the surface is smooth, regular. 



Distribution. — Station A55-39. Caledonia Bay, handline on rocky 

 reef. The species was found as well 8 miles southwest of San Nicolaas 

 Bay, Aruba Island, 23-24 fathoms. 



Remarks. — These 2 locations are far from Anacapa Island, but the 

 species is not alone in having this range of distribution. 



The species bears much resemblance to Halecium arboreum Allman 

 (Challenger Report, 1888, p. 10), a large species, 20 cm, reported 

 from Cumberland Bay, Kerguelen Island, in 105 fathoms. E. paucinodum 

 is not nearly so large but it has the same type of fasciculation and branch- 

 ing; the hydrophore and pedicel are similar and similarly attached to the 

 stem. When the nodes are present though, they are transverse rather 

 than oblique. Since Allman did not observe the gonosome, it cannot be 

 determined whether it should have been described as an Endothecium. 



