PORIFERA. II. 121 



170 fathoms, the smallest specimen; it was attached to a stone together with a great many sponges 

 of the genera Myxilla, Hymedesmia, Grayella, Hymeraphia, Plocamia, Bubaris , and Latrunculia. It 

 has further been taken northeast of the Faroe Islands, 62 c 29' Lat. N., 5 17' Long. W., depth 160 fathoms, 

 a small specimen (Ad. Jensen, the cruise of the ,, Michael Sars: 1902). 



Gcogr. distr. By the Norwegian North-Atlantic Expedition the species was taken west of 

 Spitzbergen, depth 416 fathoms. Arnesen I.e. mentions it from Bergen, at depths of 50 — 60 fathoms. 



2. H. palmata Johnst. 

 PL XIII, Fig.6a-c. 



tiybj- Spongia bacillaris Liune, Syst Nat. Ed. XII, I, 1299, 13. 

 ? I77 6. — Midler, Zool. Dan. Prodr. 256, 3086. 



?I786. Spongia palmata Ellis and Solauder, Nat. Hist, of many cur. and uncom. Zoophytes, 189, PI. 58, 

 fig. 6. 



1797. Spongia digitata Esper, Fortsetz. der Pflanzenthiere I, 190, Spong. Tab. L. 



1842. Halichoudria palmata Johnston, A History of Br. Spong. and Lithophyt. 92, 1, PI. II, figs. 1 — 5. 



1866. Isodictya palmata Bowerbauk, Mon. Brit. Spong. II, 311, 25. 



1870. Pachychalina compressa O. Schmidt, Grundzuge einer Spougienf. des atlant. Gebiet. -yj. 



1870. Homceodictya digitata Ehlers, Die Esperschen Spongien, Erlangen, 16, 32. 



1874. Isodictya palmata Bowerbank, 1. c, III, 133, PL LII, figs. 1 — 7. 



1879. Verrill, Preliminary check-List of the Marine Invert, of the atl. Coast fr. Cape 



Cod to the Gulf of St. Lawrence, 31. 



1882. Chalina palmata Carter, Ann. Mag. Nat. Hist. Ser. 5, X, 109, fig. i,a, b. 



1896. Homa'odictya palmata Lambe, Trans, of the Roy. Soc. of Canada, Ser. 2, II, Sect. 4, 190, PL II, 

 figs. 1, 1 a — f. 



Of Chalina-like appearance ; erect, more or less regularly digitately branched, the branches more 

 or less, often highly, compressed, frequently to a larger or smaller extent coalesced to plate-shaped parts. 

 The surface finely and densely shaggy from the projecting ends of the fibres. The dermal membrane a 

 thin film resting on the skeleton below and pierced by the ends of the fibres. Oscula partly scattered, 

 partly placed along the edges of the compressed branches or chiefly on one side of them. The skeleton 

 constructed as in Chalinius. forming a regular reticulation of polysplenia r primary fibres bending towards 

 the surface in a sheaf-like way, and secondary fibres perpendicular on the primary ones , the meshes 

 quadratic or rectangular. The fibres provided with a distinct sheath of spongin. Spicula: Mcgasclcra 

 oxea o-fj — o-22g"""; microsclera of one form, isochelce palmata- with the axis bending out as a projection 

 from the inside of the tooth 0-024 — o'oj""". 



The common exterior form of this species is well known, and it has often been figured, espe- 

 cially, however, in earlier works. It has attracted the attention at an early period, and its exterior 

 has given rise to the name of Mermaid's glove , by which it is said to be designated by the fisher- 

 men of the Orkneys and the Shetland Islands; however, it certainly shares this name with the digi- 

 tately branched forms of Pachychalina. In its exterior and otherwise also in its skeletal structure it 



The Ingolf-F.xpedition. VI. 2. 16 



