20 CRYPTOLAPJA ELEGANS. 



the unfascicled portion of the hydrocaulus, are cylindrical throughout, pre- 

 senting no diminution of their diameter towards the base as in C. conferta. 

 They appear also to pass continuously into the tubes of the hydrocaulus, 

 no distinct floor being apparent in the hydrothecte of any part of the 

 specimen. 



The circular striae which surround the margin of the hydrothecse are here 

 as in other species most probably indications of successive elongations occur- 

 ring during the growth of the hydroid. 



Cryptolaria abies. 

 PI. XIII. Fi(/s. 1-3. 

 Troj)hosome. — Hydrocaulus attaining a height of about two inches, irreg- 

 ularly branched, with a pinnate disposition of the ultimate ramuli. Hydro- 

 thecae, where completely visible, near the ends of the branches where the 

 fasciculation ceases, flask-shaped, adnate by somewhat more than half their 

 height, and then bending outwards; mai'gin circular, even, and without 

 obvious annular striation. 

 Gonosome not known. 



The hydrothecfe of this species are considerably smaller than those of 

 either C. conferta or C. longitheca. They can be seen, too, in the distal, 

 non-fascicled portions of the hydrocaulus, Avhere they are fully exposed, to 

 be of a very different shape from those of the two former species, being here 

 of an elongated flask-shape, tumid below and gradually narrowing towards 

 the orifice. Here also they are plainly provided with a distinct floor, and 

 in all respects resemble a typical sertularian hydro theca. In the fascicled 

 portion of the stem, where they are in great part immersed and concealed, 

 their form cannot be satisfactorily determined.* 



Cryptolaria elegans. 

 PI. XIV. Figs. I, 2. 



Trophosmiie. — Hydrocaulus attaining a height of about an inch, delicate, 

 pinnately and very regularly branched; pinnte alternate fascicled only at 

 their base or entirely monosiphonic. Hydrothecae alternate, tubular, nearly 

 cylindrical, narrow, adnate for somewhat more than half their height on 

 the distal portions of the hydrocaulus, with the free part bending outwards 



* Tlie label placed with the specimens of this species had become effaced, so that neither their exact 

 station in the area explored nor the de[)th frnm which thcv were dredged could be ascertained. 



