254 KECORD OF CURRENT RESEARCHES RELATING TO 



we have no space to follow him. Nor can we say much as to his 

 account of the Corophida ; a new genus, belonging to the subfamily 

 Podoccrinfe, is described — Orthopalame (Terschellingi) — which was 

 found at the island from which it takes its specific name ; and the 

 following species are stated to be members of the Netherland fauna — 

 CoropMum longicorne, G. crassicorne, Cerapus difformis, Orthopalame 

 Terschellingi, Amphithoe littorina, and Podocerus falcatus. 



In the basal joints of the third and fourth pairs of thoracic feet 

 the author has found glands which may, perhaps, like somewhat 

 similar glands in the Phronimida,* be poisonous in function ; they 

 do not seem to have been hitherto noticed by any observer. 



Cyclops.! — According to Mr. M. M. Hartog, the nervous cord of 

 Cyclops is essentially Copepodan in type ; it is not distinctly dilated 

 into special ganglia containing cells evenly distributed up to the 

 third thoracic segment, which is here continued by a fibrous com- 

 missure to a ganglion in the nest segment. Beyond this are no 

 cellular elements in the cord, which bifurcates in the second abdominal 

 segment, and the branches terminate in the furca. The sensory and 

 motor nerves appear to be wholly distinct, the latter coming off at a 

 higher or deeper level. All the sensory nerve-fibres pass through a 

 bipolar ganglion-cell near their distal termination. Minute, rounded 

 spaces in the hypoderm, especially one at the base of the last thoracic 

 limb, and a pair on either side of the upper face of the front of the 

 head, appear to be auditory organs (containing one or more minute, 

 irregular, highly-refractive corpuscles in the male). Respiration in 

 Cyclops is entu-ely anal. 



Lernanthropus— one of the Copepoda. | — A paper on this subject, 

 by Carl Heider, took its origin in the discovery by Professor Claus 

 of the male of L. trigonocephalus, which was hitherto unknown, and of 

 a remarkable form of receptaculum seminis in the female of L. Gisleri. 

 The latter species is very commonly to be found on the gills of 

 various fishes, and especially of Lahrax lupus, Umbrina cirrosa, and 

 others. The males are but rarely found, and are always attached to 

 the females. 



The genus appears to afford support in a very interesting manner 

 to the views of Professor Claus on the genealogy of the Copepoda. 

 A phylum of the Entomostraca, they became adapted to locomotor 

 habits and a pelagic life ; but while some exhibited a higher develop- 

 ment of the nervous system and of the sensory organs, others took to 

 commensal or parasitic habits, and underwent the degradation with 

 which these are accompanied. In Cyclops we find the second pair 

 of antonnaB converted into anchoring organs by which the creature 

 fixes itself to plants. In the Corycseida parasitism is not obscurely 

 indicated by the changes in organization, and we are, through them, 

 led to the true parasitic Copepoda, in which the body has undergone 

 so remarkable a change ; the segments of the abdomen disappear, 



* Mayer; see this Journal, ii. (1879) p. 719. 

 t 'Kcp. Brit. Assoc. A<lv. Sci.', 1879, p. 37(5. 

 X ' Arb. Zool. lust.' (Claus), ii. (1879) p. 2G9. (5 plates.) 



