230 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



since the Challenger expedition secured it and Allman reported on 

 it in 1883. 



STECHOWIA, new genus 



Branches scattered over the hydrocaulus and bearing hydrocladia, 

 each of which bears a single hydrotheca beyond which the hydro- 

 cladium is produced into a long, slender process bearing nemato- 

 phores. This genus combines the scattered branches of Antennopsis 

 and the hydrocladia bearing a single hydrotheca, as in the genus 

 Monotheca. The unique character, however, is the extension of the 

 hydrocladium far beyond the hydrotheca as a free nematophorous 

 process. 



I take pleasure in naming this very distinct genus after my friend, 

 Dr. E. Stechow, of Munich, an outstanding authority on the Hydroida. 



Genotype. — Stechowia armata, new species. 



STECHOWIA ARMATA, new species 



Plate 46, figs. 1, 2 



Trophosome. — Colony iy 2 cm. in height and 8 mm. in spread; 

 main stem unfascicled, straight, not definitely divided into inter- 

 nodes ; branches alternate on basal part and scattered over the distal 

 portion, divided into regular internodes, each of which bears a 

 hydrocladium and irregularly distributed nematophores. Hydro- 

 cladia alternate, borne on shoulders from the distal end of each inter- 

 node of the branch and bearing a single hydrotheca, beyond which 

 the hydrocladium is produced into a slender, tendril-like process 

 which is divided into irregular internodes, each of which, as a rule, 

 bears a single nematophore. These extensions of the hydrocladia 

 are often several times the length of the hydrotheca. Hydrothecae 

 bell shaped with flattened margin, wider than deep, borne on the 

 second internode of each hydrocladium. Nematophores, a supra- 

 calycine pair inserted distinctly above each hydrotheca, a mesial one 

 distinctly below the case of each hydrotheca, and a cauline nemato- 

 phore on the proximal nonhydrothecate internode of each hydro- 

 cladium. There is also a nematophore on each joint of the process 

 extending beyond each hydrotheca and often a pair at the distal 

 end of this process. Cauline nematophores are also found in the 

 axil of each hydrocladium, one on each internode of the branches 

 which bear the hydrocladia, and a number scattered over the main 

 stem. 



Gonosome. — Gonangia borne on the proximal parts of the branches, 

 oblong-ovate in form, with their distal ends abruptly truncated. 

 The contents indicate that the colony described is male. 



This species bears a superficial resemblance to Calvinia nnirabilis 

 Nutting, 28 in which the mesial nematophore of each hydrotheca is 



* American Hydroids, pt. 1, The riuuiularidae, 1000, p. 77. 



