60 The Irish Naturalist. February, 



PYCNOGONIDA. 



BY PROFESSOR GEO. H. CARPENTER, B.SC. 



The only species of pycnogon collected was Pycnogonum littorale, 

 Stroem, of which N. Colgan took several examples of both 

 sexes in pools near the harbour on April 16, 1906. The specimens 

 are, however, remarkable on account of their small size ; an 

 egg-bearing male measures only 5 mm. in length, and an adulj 

 female only 8 mm. Structurally, the Lambay specimens are 

 not different from ordinary large forms of the species. In 

 correlation with the small size of these insular animals, it may 

 be worth mentioning that Colgan dredged in 13-14 fms. off 

 Skerries, an adult male of this species measuring only 7 mm. 

 in length. 



PHALANGIDA. 



BY PROF. GEO. H. CARPENTER, B.SC. 



The " Harvestmen " collected on Lambay are for the most part 

 common on the mainland. Only Acantholophus tridens can be 

 considered as, in any way, a scarce phalangid. The five species 

 represented, out of the fourteen now known to occur in Ireland, 

 are as follows : — 



Liobunum rotundum (L,atr.) — Freshwater Bay. Four males and 

 one female, Oct., 1906; N.W. shore, one male and four females, Oct., 

 1906. 



Phalangium opilio, Linn.— An adult male and a few young specimens 

 June, 1906; four males and two females on N.W. shore, Oct., 1906. 

 The October males are richer in colour than the June specimen and 

 have larger and more prominent chelicene. 



lYlitopus morlo (Fab.)— Three adult females and several immature 

 specimeus, June, 1906 ; an adult male and two females in October. 



Acantholoplus tridens (C. L. Koch.)— Three adult males of this 

 rather local species on the N.W. shore, October, 1906. 



Nemastoma Iugubre (Miiller).— Four males and two females; in 

 one male the typical pair of white spots are almost obsolete ; Fresh- 

 water Bay, October, 1906. 



A noteworthy feature is the absence from the list of the con- 

 spicuous Megabunus diadcma (Fab.) which is so widely distri- 

 buted over Ireland generally. 



