256 SUMMARY OF CURRENT ItESEARi HES RELATING TO 



dividual. A comparison is made of the species of PhyllotfwtopUrus 

 which form true colonics, and some morphological questions are discussed. 



Genus Prionospio.* — M. Caullery discusses several species of this 

 genus and proposes a division into two sub-genera. The sub-genus 

 Prionospio s. str. will include species, e.g. P. stemstrupi, in which the 

 first setigerous segment has reduced parapodia without branchiae. The 

 sub-genus Paraprionospio nov. will include species, e.g. P. pinnata, in 

 which the first pair of parapodia are like those that follow and bear 

 branchiae. 



Nematoh.elniinth.es. 



Nemathelmia and Kinorhyncha of Clare Island.t — R. Southern 

 reports on 83 Nemathelmia and Kinorhyncha, all of which, except 

 Parachordodes violaceus, are additions to the Irish fauna. He also 

 records two Chsetognaths— -Sagitta bipunctata and Spadella cephaloptera. 

 The list includes one new family, OgmidaB, eight new genera, twenty- 

 eight new species, and twenty-six others which have not previously 

 been recorded from the British Isles. This larger number is the more 

 remarkable because the collection was obtained as a by-product of 

 the search for other groups. The genus Nuada is remarkable for the 

 slenderness of the body and the thickness of the cuticle ; Halaphano- 

 laimus is most closely related to Aphanolaimus ; Gricolaimus has a 

 rounded head with a single row of four long sub-medium hairs, lateral 

 sense-organs in the form of thick spirals, a median ventral pre-anal 

 row of fourteen supplementary organs consisting of tubular chitinous 

 ducts, into which open large unicellular glands ; Dagda seems to be 

 most closely related to Diodontolaimus, but differs strikingly in the 

 structure of the buccal cavity, which is conical and armed with three 

 teeth ; Diodontolaimus is characterized chiefly by the structure of the 

 cylindrical buccal cavity, which is armed at its anterior end with two 

 subventral teeth ; Fiacra is closely related to the group containing the 

 genera Thoracostomy Enoplus, and Triodontolaimus ; Demania shows 

 in the structure of the head and buccal cavity a distant affinity with the 

 genus Oncholaimus. 



The author describes new species of Chsetosoma and Desmoscolex, in- 

 teresting additions to the British fauna. The new family Ogmidse is 

 established for free-living Nematocla of small size. The body is composed 

 of numerous segments, each bearing a number of recurved spines regularly 

 arranged in rows. The head is composed of several narrow rings 

 without spines. The oesophagus terminates in a rounded bulb, and is 

 armed with a chitinous spear nearly as long as the oesophagus. The 

 intestine is a simple tube, and the anus is ventral, the ring containing 

 the anal aperture being modified. The type is Of/ma murrayi g. et sp. n. 

 Five Echinoderidas are described, and it is noted that no representatives 

 of this group have been previously recorded from the British Isles. 



* Bull. Soc. Zool. France, xxxix. (1914) pp. 355-61 (2 figs.;. 



t Proc. Irish Acad., xxxi., Clare Island Survey, pt. 54, pp. 1-80 (12 pis.). 



