MUSEUM OF COMPARATIVE ZOOLOGY. 55 



Actinauge longicornis, var. Caribsea Verrill, nov. 



Grows to very large size. One of the largest has the base clasped around a 

 bundle of large silicious sponge spicules, like those of Hyalonema. This in 

 alcohol has the body four inches in breadth; the base along the sponge spicula 

 is six inches. Other large specimens hold globigerina and pteropod ooze in 

 the bulbous base. The young mostly clasp branches and stems of Gargonice, 

 the basal edges uniting in a iirm suture even when very small. 



It resembles, when in alcohol, certain specimens of longicornis. It has a 

 similar thick, parchment-like, white, naked integument, which is more or less 

 reticulated by \vrinkles, leaving slightly marked squarish elevations, on the mid- 

 dle of which there is often a small round wart. 



Rather small, smooth, rounded, persistent verrucse are sparingly distributed 

 over the surface, above; they are arranged in longitudinal rows, and become 

 smaller and more remote below, fading out above the base; some of the upper- 

 most are often surmounted by a small, central, dark brown patch of a chitinous 

 epidermal coating. The submarginal zone is crossed by numerous elevated 

 ridges, which run to and join the bases of the tentacles, as in the typical form; 

 but in most of the specimens dissected, they become larger aftd more swollen 

 next the tentacles, and run far up their outer sides, so as to cause their bases 

 to be more swollen than in the similarly preserved typical specimens, but 

 these differences may be due largely to differing states of contraction. The 

 tentacles seem to be fewer, relatively larger and longer, and more concentrated 

 toward the margin, but of this it is not possible to judge accurately from alco- 

 holic sjiecimens. 



Traces of orange-brown color remain, on some specimens, as a brown ring 

 defining the lower edge of the submarginal zone, and as median stripes on the 

 longitudinal ridges of this zone, and on their continuations on the outer bases 

 of the tentacles. 



The following specimens were dredged by the Blake, 1878-80. 



Locality. Specimens. 



1 large, on sponge 



spicules. 



2 j . on Gorgonia. 

 2 ]. clasping mud. 

 1 1. " " 



Actinauge nexilis Verrill, sp. nov. 



Plate VI. Figs. 4, 6. 



Column low and broad in preserved specimens, with a firm integument, to 

 which a brown epidermal film usually adheres, especially toward the base and 



