447 



tinals, but mammillata, which has spined dermal spicules, 

 seems not to belong here, and is by Thiele, I think quite 

 correctly, referred to the genus Pytheas Tops == Crella Gray. 

 Stylostichon and Plumohalichondria both have smooth dermal 

 spicules. 



S. hospitalis 0. Schmidt. 



1870. Cribrella hospitalis 0. Schmidt, Grundzüge einer Spongienf. des atlant. 



Gebiet. 56, Taf. IV, Fig. 12. 

 1876. — — , Carter, Ann. Mag. Nat. Hist. 4, XVIII, 313, PI. 



XIII, fig. 18, PI. XV, figs. 36 a— b. 

 1887. — — , Fristedt, Vega-Exp. vetensk. lakttag. IV, 453, PI. 



25, figs. 47—50, PI. 29, fig. 20. 



Besides the above mentioned species of this genus there 

 is still one more known, the Cribrella hospitalis mentioned by 

 Fristedt being, after my examination of the type specimen, a 

 Stylostichon. I can for the present not with certainty decide, 

 wether the Cribrella hospitalis described by Carter (1. c.) is 

 identical with the present species, but it is very probable ; 

 should this prove to be the case, it will be probable that also 

 С hospitalis Schmidt is the same, as Carter says, that he 

 has compared his species with a slide of the original specimen, 

 and then C. hospitalis Schmidt which is at present taken to be 

 a Grayella [Yvesia Tops.) will be in reality a Stylostichon. 



A fine, pedicellated specimen has been taken at East- 

 Greenland, depth 125 fathoms (The Swedish arctic expedition 

 1883; Fristedt 1. c). 



Hymerapbia Bow. 

 H. sp. 

 At Angmagsalik, depth 140 fathoms. (The Amdrup-expedi- 

 tion 1900). 



Crella Gray. 



[Pytheas Tops.) 

 Of this genus three species have been taken, at Angmag- 

 sahk, depth 140 fathoms, and at Rathbone 0, depth 94 fathoms 

 (The Amdrup-expedition 1900, and Kruuse). 



