CLADOCARPUS PARADISEA. 53 



There are thus two bifurcations in this species, while in Cladocarpiis doli- 

 choiheca there are three. This difference appears constant. 



The branches of the phjlactogonia are all provided with well-devel- 

 oped tubular nematophores, which are arranged along each branch in 

 a single longitudinal series. 



Cladocarpus paradisea. 



Pk. XXXIL and XXXIII. 



Trophosome. — Stem attaining a height of fourteen inches, irregularly 

 branched, fascicled, and thick below, gradually losing its fascicled condi- 

 tion, and becoming monosiphonic towards the distal ends of the main 

 stem and branches ; pinnae alternate, rather distant, attaining a length 

 of about one inch and a quarter. Hydrothecae large, deep, widening up- 

 wards ; margin with two strong teeth in front ; rest of the margin des- 

 titute of teeth ; intrathecal ridge faintly marked, forming a waved line 

 which stretches across the middle of the hydro theca. Supracalycine nema- 

 tophores bracket-shaped, not overtopping the margin of the hydrotheca ; 

 mesial nematophore attaining about one third the height of the hydro- 

 theca, to which it is adnate to within a short distance of its extremity. 



Gonosome. — Gonangia-bearing appendages (phylactogonia) in the form 

 of pinnately branched offshoots, which spring each from a pinna of the 

 trophosome close to its origin, and is set with cup-shaped nematophores 

 along its stem and branches ; branches of phylactogonia alternate ; female 

 phylactogonium larger than male, and carrying a single gonangium in front 

 of the axil of each of its branches ; male with a cluster of gonangia 

 at the base of each branch ; female gonangia obovate, with a latero- 

 terminal transversely elongated orifice over which the summit of the 

 gonangium bends in the manner of a hood ; male gonangia smaller 

 than female, obovate, with a sub-terminal orifice not arched over by the 

 summit. 



Dredged off Tennessee Reef, from a depth of 174 fathoms, and off Samboes, from 123 fathoms. 



Cladocarpus paradisea is a magnificent species. I take for granted that 

 the difference presented by the gonosomes in the specimens examined 

 is a sexual one, for there is no difference in the trophosomes ; but 

 though I believe I am right in regarding the larger gonosome (Ti. 

 XXXIII. Fig. 3.) as the female, I could not from the specimens determine 

 this point with certainty. 



