from Stat. 170, near the Kermadec Islands, which was considered by Spence Bate to be the 

 female of Helleri and the thoracic legs of which were provided with normal epipods, certainly 

 belongs to the other genus. Concerning the epipods of Stereom. Grimaldii (Bouv.) nothing is 

 known, but this species is very closely allied to Stereom. natia, of which it is regarded by 

 Mr. C. M. Selbie to be a variety. 



Like the species of Polycheles, also those of the genus Stereomastis are distinguished 

 by some other common features, which likewise demonstrate the validity of this genus. The 

 lateral borders of the carapace, indeed, are constantly armed with less than 20 spines, 

 the median dorsal ridge is smooth and invariably armed with a definite number of 4 to 7 spines 

 and, except Stereom. cerata (Alcock), there are constantly two spines at and near the outer 

 angles of the anterior border of the i st abdominal somite. As regards P. Grimaldii (Bouv.), 

 I would remark that this form is said to be closely related to Stereom. andamanensis (Alcock) 

 and Stereom. nctna (S. I. Smith), so that this species certainly also must be assigned to the 

 genus Stereomastis. 



The genus Eryoneicus Sp. Bate, distinguished by the inflate and globose carapace, 

 which is longer than the abdomen, by the shape of the phymacerite, the shortness of the inner 

 antennular flagellum and some other features, includes nowadays 1 2 species and 1 variety, that 

 nearly all occur in the Atlantic. The Indopacific Region, indeed, is inhabited only by one 

 single species, Eryon. indicus Alcock & Anderson, that occurs in the Arabian Sea and the 

 Bay of Bengal, and by its variety hawaiiensis Rathb., which was taken in the vicinity of 

 Kauai Island. The Eastern Atlantic, north of the Equator, is the habitat of the curious Eryon. 

 Alberti Bouv., which, as Professor Bouvier remarks, differs from all known Eryonidae by the 

 immoderate width of its carapace, furthermore of Eryon. caecus Sp. Bate, the first described 

 species of this genus, discovered by the Challenger Expedition off the Canary Islands, of Eryon. 

 spinoculatus Bouv., that has been obtained north of Terceira, Azores, and finally of 3 species, 

 recently described by Mr. C. M. Selbie, which have been captured by the Irish Fishery cruiser 

 Helga off the west coast of Ireland, viz. Eryon. hibemicus, Eryon. Scharffi and Eryon. Kempi. 

 Two species are found in the Mediterranean, firstly Eryon. Puritanii Lo Bianco, taken near 

 the island of Capri, but observed also off the Azores and in the Gulf of Gascony; the other 

 species, Eryon. Faxoni Bouv., has been gathered by the "Princesse-Alice" south west of the 

 Balearic Islands, but was previously already captured by the "Talisman" off Cape Cantin, 

 Morocco. Eryon. atlanticus Lenz, a species discovered by the German Southpolar Expedition 

 1901 — 1903 and a detailed description of which was given by K. Strunck, of Lübeck, formerly 

 assistant of the lamented Prof. H. Lenz, has been captured in the Equatorial Atlantic. Eryon. 

 spinulosus Fax. occurs near the Galapagos Islands and the last species, finally, taken also 

 by the "Albatross" Expedition in the Gulf of Panama, is in Faxon's Report of 1895, that 

 contains beautiful figures of this Eryoneicus, referred with some hesitation to Eryon. caecus 

 of the "Challenger" Expedition, but Bouvier has pointed out in 1905 that both species are 

 certainly different. 



The genus Willemoesia Grote, finally, that differs from the three other genera by the 



