236 Part 1II—Eleventh Annual Report 
the species contained in the work of that author; and while doing so, he 
recognised a close resemblance between Canthocamptus crassus, G. O. Sars, 
and Attheyella spinosa, Brady, and between Canthocamptus pygmexus, 
G. O. Sars, and Attheyella cryptorum, Brady ; a further examination 
tended still more to confirm the identity of the two species of G. O. Sars 
with the corresponding species described by Dr Brady. 
Should my son’s identification prove to be correct, the specific names 
adopted by Professor Brady will necessarily give place tv those of Professor 
G. O. Sars, and in that case the nomenclature of the two species will 
stand thus :—Attheyellu (Canthocamptus) crassa (G. O. Sars). = Attheyella 
spinosa, Brady. Attheyella (Canthocamptus) pygmzxa (G. O. Sars)= 
Attheyella cryptorum, Brady. 
The following is Professor G. O. Sars’ description of the species 
referred to :— 
(1) Canthocanptus crassus, G. O. Sars (loc. cit., p. 23). 
‘Corpus quam in specibus ceteris robustus segmentis abduminalibus 
‘ postice attenuatis in margine postico subtus et ad latera pilis vel aculeis 
sat longis pectenatim ornatis. Rami caudalis forma singulari fere ovati et. 
ad basim valde constricti setis apicalibus brevibus er valde divergentibus ; 
sete intermediz duoz insolito modo flexuose in medio sparsim cilliate 
exteriore quam interiore triplo breviore. Autennz 1 mi paris sat crass 
setis longis dense obsitze. Jtamus interior pedum | mi paris 3-artieulatis 
exterior aliquanto longior in paribus sequentibus 3st brevissimus et 
‘ biarticulatus. Pedum 5 ti paris articulus basilis Introrsum parvum dila- 
tatus et ut articulus ultimus setis longissimus preditus. Color albidus, 
longit circit $ mm.’ 
(2) Canthocamptus pygmeus, G. O. Sars (loc. cit., p. 21). | 
‘Corpus postice parum attenuatum segmentis abdominalibus sat crassis 
versus Marginem posteriorem ad latera et subtus serie transversa aculeorum 
instructis. Rami caudales brevissimis lJatioris quam longiores setis 
majoribus apicalibus duabus sat divergentibus in medio aculeatis, 
exteriore dimidiam longitudinem interioris equante. Operculum anale 
dentatum, dentibus majusculis. Antennz 1 mi paris brevissime pedun- 
culo (articulis basilibus 4-composito) crasso flagello vero valde attenuato. ’ 
Ramus interior pedum | mi paris exterlore paullo brevior ut in paribus 
sequentibus duoebus biarticulatus, in pari 4 to unarticulatus minimus 
articulo 1 mo rami exterioris vix longior. Pedum 5 ti paris biarticula- 
torum, articulus 1 mus introrsum in processum foliformen magnum et 
setiferum articulatum ultimum minimum et rotundatum longe superantem 
exit. Oculus minimus a margine antico capitis remotus saccus oviferus 
elongato-ovatus. Animal sat pellucidum colore plerumque albidointerdum 
‘ Jeviter rubicundo longit vix } mm.’ 
The species provisionally described in this paper on the fauna of the 
Inland Waters of Scotland under the name of Attheyella propingua may 
probably be identical with Sars’ Cunthocamptus brevipes; but as there 
are apparently one or two important differences between them, it seems 
better for the present to retain the specific name adopted in this paper. 
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