INTRODUCTION. 
Verm. 3 
of the genera to one another should be read Birula’s views on the members 
of the family occurring in the Black and Caspian Seas and their relations 
to one another and to the arctic species (15). Arwidsson (6) gives a 
much wished-for account of the internal anatomy of 2 genera of Glyceridce. 
Fauvel, having discovered a 2nd specimen of Eupolyodontes cornishii is 
able to give the histology of the peculiar branchia-like filaments on the 
back of this Acoetid ana to describe its pharynx and jaws (74). He has 
also studied the vascular .system of the Amphictenidce (75). Schreiner 
(224) details the histological structure of the eyes in the different families 
of Errant annelids; Goodrich (91) describes the interesting nephridia and 
ciliated organs of Hesione, Tyrrhena and Nephthys ; CANTACUzkNE (46) the 
different phagocyte organs, some of them regularly arranged in each seg- 
ment, in Nephthys, Glycera, Arenicola and Spirographis. Goodrich (92) 
contributes to our knowledge of the internal anatomy of the interesting 
genus Sternaspis. 
As regards the Gephyrea : Gruvel & Kunstler (98) give an account of 
the history of the “urns” and of what they term “enigmatical vesicles” in 
the ccclomic fluid of Sipunculus, evidently considering them independent 
organisms. A more detailed account with figures is promised. A pig- 
ment, to which the name of “ thalassemin” is given, occurring in a new 
British Ecliiuroid is reported on, and compared with known pigments, by 
Sherrington, Noel Paton and Miss Newbigin in Herdman’s paper (105). 
The mode of occurrence and optical properties of the pigments chcetopterin 
and bonellin is discussed by Lankester (144) who gives Engelmann’s 
measurements of the absorption spectra of both. 
Interesting new Oligochceta are described by Michaelsen (175 & 176), 
Beddard (9), Benham (10), Rosa (213) to (216), Eisen (70), Fedarb (77) 
and Smith (232). The physiology of the group has been carefully studied 
by Cuenot (59) in 15 species (5 of them freshwater) and in a Branchiobdella , 
with especial reference to glycogen- and fat-storing cells, the coelomic 
corpuscles, the blood corpuscles, the dorsal pores, and organs for excretion ; 
the mode of attacking parasites by phagocytes is also described. Eisen 
(70) describes what appear to be auditory cells in a Pontoscolex ; and the 
minute anatomy of dorsal vessel and cardiac body in Enchytrseids is 
shortly described by Rakowski (205) and (192). 
Interesting experimental observations have been made to determine the 
causes of self-amputation in earthworms, and in a marine worm, by 
Hescheler (106), and its relation to asexual reproduction is discussed by 
Giard (86), see also Michel (177), p. 313. Morgan (187) and Michel (177) 
recount experiments on the power of regeneration of lost parts in earth- 
worms which Confirm those of Hescheler published last year. Korschelt 
(137) finds this power much greater than the other authors referred to, 
the discrepancy being apparently due to the remarkable fact that small 
pieces of a worm regenerate more complete new heads than larger ones. 
Joest (127) has also observed self-amputation and has made a number of 
experiments with sewing together different parts of earthworms either 
of the same or of different species. In this way double headed or double 
tailed monsters were sometimes produced. Morgan (187) gives the results of 
a few similar experiments. A specimen of a Cirratulid with a second tail, not 
artificially produced, is described by MjSsnil & Caullery (170). Methods 
of producing abnormabilities in Planarians are described by Randolph 
(206), whose experiments shewing the enormous regenerative power in 
these animals are also of interest. The histological processes involved 
in regeneration are made the subject of important memoirs by Hescheler 
(107), the re-development of the central nervous system and the stoma- 
deum in Lumbricus being especially dealt with ; and by Hepke (104) for 
the Naidce. v. Wagner (256) confirms Hescheler’s account of the re- 
formation of the stomadeum for Lumbricidns. Hescheler points out the 
