ARACHNIDA. 375 
BogdahoiF has described two forms of Acaridm found parasitic upon the 
human skin. One of these occurs upon the surface of the skin in patients 
affected with the itch ; the other has been found on a single occasion on a 
child suffering from herpes farinosus. The author regards the two forms as 
probably c? and $ of the same species, which he names DermatopJiagoides 
schet'emetewskyij its nearest relationship being with the genus Dermatophagus. 
Bull. Soc. Nat. Mosc. tome xxxvii/ part i. pp. 341-345, pi. 7. 
SlMONEID^, 
Sinionea follicidm'ujn, Simohds describes the occurrence of this species in 
various domestic animals. Journ. Agric. Soc. 2nd ser. vol. i. pp. 69-72. 
TARDIGRADA. 
Echiniscus sigtsmundt, sp. n., M. Schultze, Archiv fiir piikr. Anat. Bd. i. 
p. 430, pi. 26, from Heligoland and Ostend. 
LINGUATULINA. 
Dr. William Aitken, in an Appendix to his work ^The Science and 
Practice of Medicine,’ gives the particulars of the fatal effects of the presence 
of Pentastoma constrictum in the human body. The parasites were encysted 
in the lungs and liver. 
PODOSOMATA. 
Mr. Hodge’s Report on the Pycnogonoidea dredged off the coast of 
Northumberland is referred to in the f Record’ on Crustacea, p. 310. 
