FARREA OCCA SCUTELLA. 119 



provided with lateral spines and a terminal verticil ("disc") of such, like the 

 secondary end-rays. I consider these simple rays as ordinary end-rays which 

 have not coalesced with others to form pseudomain-rays and which are not 

 divided distally into branches (secondary end-rays). 



I am inclined to consider the specimen above described as the basal part of a 

 higher, perhaps cup-shaped, sponge, the upper parts of which may have been 

 either nipped off by the Dicranodromia, which used it as tent and shield, or torn 

 off during capture. 



Since hexactine megascleres are absent and since the sponge possesses 

 hypodermal pentactines, mostly diactine spiny dermals, oxyhexasters, hemioxy- 

 hexasters, microoxyhexactines, small discohexasters, and discoctasters, 1 tliink 

 there can be little doubt that it belongs to Staurocalyptus, although its gastral 

 spicules are unknown. It differs from all the species of this genus hitherto 

 described by the possession of oxyhexactines and hemioxyhexasters with hook- 

 like rays. This and other minor differences necessitate the establishment of a 

 new species for it. 



EURETIDAE Zittel. 



Hexasterophora the body of which is calyculate or composed of ramified or 

 anastomosing, thin-walled tubes. With a firm reticulate supporting skeleton- 

 net. Among the free spicules are always uncinates and either scopules or 

 clavules. With oxyhexasters or discohexasters or both. 



The collection contains nine more or less complete specimens and twenty 

 fragments of this family. The generic position of two specimens and twelve 

 fragments is doubtful. The others belong to the two genera Farrea and Eurete. 



FARREA BOWERBANK. 



Euretidae with clavules, without scopules. 



There are four more or less complete specimens which represent a new 

 variety of Farrea occa Bowerbank. Eight fragments apparently belong to two 

 distinct forms which, however, cannot be specifically determined. 



Farrea occa scutella, var. nov. 

 Plate 25, figs. 25-29; Plate 26, figs. 1-21; Plate 27, figs. 1-17. 



The collection contains four more or less fragmentary specimens of this 

 sponge, all trawled off the southern coast of western Panama at Station 4621 on 

 21 October, 1914; 6° 36' N., 81° 44' W.; depth 1067 m. (581 f.); they grew on 

 green mud and rock ; the bottom-temperature was 40.5°. 



