632 
ZOOLOGICAL LITERATURE. 
ANNELIDA DISCOPHORA. 
Aulastomum lacustris, sp. n., Leidy, 1. c. p. 229, Twin Lake, Minnesota. 
Hirudo decora^ Say. Leidy (1. c, p. 230) describes this, the common me- 
dicinal leech of America, in detail j it has hitherto been so imperfectly de- 
scribed, that Diesing, in his ‘Systema Ilelminthum,’ placed it in the “Bdel- 
lidea, species genere penitus dubico.” 
ANNELIDA CH^TOGNATHA. 
PterosagittUf g. n., A. Costa, 1. c. p. 64. Corpus sagittiforme, lateribus 
sparse setosum, pinnulis duabus thoracicis flabelliformibus e radiis rigidis 
constitutis, pinnaque caudali horizontali itidem radiata praeditum. Os ut in 
gen. Sagitta. P. meditet'ranea, A. Costa, I, c. p. 66, tav. 3. fig. 1. . 
ANNELIDA GEPHYREA. 
Urophgsalus grubii, gen. & sp. nov., A. Costa, 1. c. p. 66, tav. 3. fig. 2. 
This genus resembles Phascolosoma very closely, indeed only difiers from it 
in the form of the caudal appendage. 
SCOLECIDA 
BY 
E. Perceval Wright, M.A., M.D., F.L.S. 
Balbiani, E. G. Recherches sur le developpement et la propa- 
gation du Strongyle geant. Compt. Rend, tome Ixix. No. 21 
(Nov. 1869), pp. 1091-1095. 
CoBBOLD, T. S. Entozoa, being a supplement to the Introduc- 
tion to the study of Helminthology. Roy. 8vo, pp. 1-124. 
London, 1869. 
This supplepaentary volume contains notes on feeding-experi- 
ments with Trichina spiralis, on the rearing of the Larvae of 
T(enia mediocanellata, on the nature of certain Pseud-Entozoa 
found in diseased and healthy Cattle, on the Entozoa of the Dog, 
Common Fowl, and Game Birds, on the Distoma clavata of the 
Swordfish, and on the D. elephantis of the Indian Elephant; 
