jQg PORIFERA. I. 



Lat. N., 27° 00' Long. W„ depth 485 fathoms; station 85, 63° 21' Lat. N, 25° 21' Long. W., depth 170 fathoms; 

 station 89, 64° 45' Lat. N., 27° 20' Long. W., depth 310 fathoms; station 94, 64° 56' Lat. N., 36" 19' Long. W., 

 depth 204 fathoms. Thirty and odd specimens have been taken in all. According to the localities 

 the species is spread in the Davis Strait and the Denmark vStrait between ca. 62° and 65° Lat. N., on 

 depths from 170—788 fathoms. 



Gcogr.distr. Where the specimen mentioned by Topsent, 1. c, which I refer to this species, 

 has been taken cannot be stated, but the collections, as well known, were made from the Bay of 

 Gascony over the Azores to New Foundland, and accordingly the species reaches down to ca. 38° Lat. N. 

 The H. papilla fa of Vosmaer is taken south of Spitzbergen on depths of 145 and 180 fathoms. 



As correctly stated by Topsent I.e., the genus Wviicntla established by O.Schmidt in 1880, 

 and kei^t in 1887 by Ridley and Dendy in Challeng. Monaxonida together with Gray's genus 

 Hamacantha established in 1867, will have to be comprised under this genus as a synonym, and 

 thus Haiiiacaiifha will be the only genus in the subfamily Hauiacaiithiiio'. As certainly charac- 

 terized as is the genus Haiiiacaiif/ia, as much incertainty is found with regard to some of its species. 

 Ridley and Dendy are surely right, when they (Challeng. Report, Monaxonida, LXVI) express the 

 opinion that the H.tibiccu established by O. Schmidt 1880 (Spong. der Meerbus. von Mexiko, H, 83), 

 which is said to have as well diancistra as chelae ( Doppelankern > Schmidt), is either a Desmacidonid 

 with sigmata of such a form, that they might be misinterpreted as diancistra, or, what is perhaps 

 more possible, with diancistra as foreign bodies. 



At present the list of the species belonging to Hainacaiitha^ looks as follows: 



1864. Hamacantha (Hymedcsmia) Jolivsoni Bow. — Doubtful; the original never described; see before 



imder //. Bowcrbaiiki. 

 1874. •• (Haliclioiidria) falcnla Bow. — Perhaps == FI. Bowcrbanki \\\\\\\\ see this species. 



1880. » (Vomcrula) tenda Schmidt. — Stated to have fine oxea ( feine Umspitzen;. Schm.) 



and bows, with transitional links between them. 

 1880. » (Vpiitcrula) tibiccn Schmidt. — As stated above scarceh' a Hatiincaiitha. 



1882. » (Hymcdcsmia) Scluuidtii Cart. — Stated by Carter to have oxea, diancistra and 



genuine sigmata'). 

 1885. y papilla fa Vosm. — Perhaps = H.ii/iplicaiis mihi; see this species. 



1887. * (l^omenila) rspcrioidcs R. and D. — Well characterized species, has of microsclera 



sigmata and diancistra of two forms. 

 Boivcrbariki mihi. 

 iijiplicans mihi. 



') This species (Ann. Mag. Nat. Hist. Ser. 5, IX, 297, PI. 11, fig. 21 a— e) might perhaps be identical with H. esperioides 

 R. and D., as it appears to have diancistra of two forms and sigmata; Carter, to be sure, states it to be possessed of oxea, 

 but his figure would imply that the question is of styh with highly tapering head ends. When Carter refers Schmidt's 

 H. Johnsoid from Florida (Spong. Atl. Gebiet.) to his species, this is surely not correct, as it does not appear from the descrip- 

 tion of Schmidt that his species has real sigmata. 



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