340 THE ZOOLOGIST. 



specimens, some carrying eggs, were dredged on May 26th, 

 1914, from the clear water of the Cholesbury Common Pool, 

 which is on the side of the Common farthest from Hawridge ; a 

 few empty loricas were also obtained at the same time. 



Before passing on to describe the next species, it may be 

 pointed out that so far A. brevispina has been found in the pools 

 of Chipperfield Common, Hastoe, and Chesham Eoad, while 

 A. aculeata has been found in the pools of Bedmond, Kings 

 Langley Lodge, and Cholesbury Common, as already set forth. 

 The two sets of pools named evidently have characteristics 

 favouring the presence of A. brevispina, in one case, and of 

 A. aculeata in the other. What these characteristics really are 

 I am unable to say, but it may be given as a statement of fact 

 that I have found the waters of the said pools of Bedmond, 

 Kings Langley Lodge, and Cholesbury Common to be decidedly 

 clearer and fresher than those of Chipperfield Common, Hastoe, 

 and Chesham Boad. Hastoe Pool, which yielded such a vast 

 number of specimens of A. brevispina on May 26th, 1914, was 

 much less clear than any of the other pools mentioned. 



17. Anuraea cochlearis, Ehren. — This small Botifer has been 

 obtained from the Grand Junction Canal and Kings Langley 

 Lodge Pool. On October 15th, 1913, a few specimens were 

 obtained by dredging in the canal at a part about one-quarter of 

 a mile south of Tring Station, and from the same part of the 

 canal numerous living specimens and several loricas were 

 dredged on May 26th, 1914. Many specimens were obtained 

 on April 13th, 1914, from Kings Langley Lodge Pool. They 

 swam forward rapidly, at the same time rolling over or from 

 side to side. The main feature of the specimens, that to which 

 the specific name owes its origin, was the spoon-shaped lorica, 

 the "handle" of the spoon being a stout spine, the whole 

 resembling some forms of the old Boman cochlear, which was 

 used not only for eating eggs but also shell-fish. 



Dr. Lauterborn made a detailed study of the variations of 

 A. cochlearis in size and form, paying particular attention to 

 variations in the length of the posterior spine. He examined a 

 large number of specimens from pools and parts of the Bhine 

 near Neuhofen, Bosheim, Ludwigshafen, and other places, and 

 gave his results in several papers. In one of these (Verh. 



