SniTZOrODA. 29 



Museum, infonns nie that ouly five spines arc present on the Literal margins, so that 

 the armature of the telson of P. sur.^i approximates closely to that of P. helgka;. 



The ouly other species of P.veudomma having smooth ocular lamin;« is 

 P. australe, G. 0. Sars (1885), from Bass Straits, Australia. The vastly (liti'eient 

 form of the anteunal scale in the latter, however, abundantly distinguishes it from 

 P. helgiccc. 



Besides the single ' Discovery ' specimen, this species is also known from the 

 ' Belgica ' collections, and has been described by Hansen in MS. under the name which 

 is here used. It is possible that the mutilated specimen noted by Sars (1885, p. 191) 

 from 1675 fathoms in the Antarctic Ocean may have belonged to this species rather 

 than to P. sarsi. Sars notes that it was much larger than tlie latter. 



Genus Dactylamblyops, Holt and Tattersall. 



DMtijhimbhjnitx, Holt aud Tiittersall, I'.Xii; (1). 

 l)(niijlenjt]iro[is, Illig, l".)(i(i, iioii Holt and Tattersall, lilOo. 

 ? Amlli/ops {pars), Ohliu, IDdl. 

 Dactijlamhhjops, Tattersall. l',)(»7. 



This genus was established for the reception of the single rather mutilated specimen 

 of D. hodgsoni in the present collection. Since the publication of the preliminary 

 notice of the ' Discovery ' Schizopoda, however, two closely allied species have Ijeen 

 discovered off the west coast of Ireland (Tattersall, 1907). A clearer idea of the 

 exact relationships of the genus has thus been gained, and while the species referred 

 thereto appear, in the present state of our knowledge, to form a natural group, it is 

 undeniably very nearly allied to Dactylerythrops, Holt and Tattersall (1905), to 

 which genus, indeed, the present species was referred l)y Illig (1906). 



The definition of the genus given by Holt and Tattersall, 1906 (1), may therefore 

 be amended as follows : — 



Dactylamblyop.s, Holt and Tattersall. 



Characters generally as in Amhlyops, G. 0. Sars, except : — 



Eyes placed close together, but not contiguous, more or less pyriform in shape, 

 furnished with distinct and definite peduncles ; visual elements imperfectly developed, 

 numerous, reaching to the surface of the eye, and probably directly functional as 

 organs of Sight : outer distal corner rounded, ami not produced into a digitiform 

 process ; a short blunt process always present on the inner and upper surface. 



Second thoracic limbs with the endopods not noticeably short, but well developed, 

 and consideraljly longer than the endopods of the first thoracic limbs. 



Ti'Lton not very long, triangular in shape, the distal parts of its margins armed 

 with more or fewer spines ; median setfB absent. 



Type species, D. hodgsoni. Holt and Tattersall. 



VOL. IV. H 



