624 EEPOET OF COMMISSIONER OF FISH AND FISHEEIES. 



tapered, obtuse, or slightly emarginate at the end, with a simple orifice. 

 The blood contains minute, oblong corpuscles. Color milk-white. 

 Length, 25 mm to 40 mm ; diameter, 0.5 mra to l mm . 



New Haven ; Wood's Hole ; Oasco Bay, Maine ; very common under 

 dead sea- weeds and stones near high- water mark. 



Enchytrjeus triventralopectinatus Minor. 



American Journal of Science, vol. xxxt, p. 36, 1863. 



In this species, according to Minor, there are three pairs of ventral 

 fascicles of setse before the dorsal ones commence ; the pharynx extends 

 to the fourth pair of ventral fascicles, from which a narrow oesophagus 

 extends to a little back of the sixth X3air ; here a gradual enlargement 

 of the alimentary canal occurs, ending abruptly just back of the eighth 

 in a narrow, twisted tube, and this gradually enlarges at the ninth ven- 

 tral fascicle into a moderate sized alimentary canal. No eyes. Length, 

 about 10 mm . 



New Haven, near high-water mark (Minor). 



BDELLODEA. 



Comparatively few leeches have hitherto been met with in this region. 

 Many additional species, parasitic on fishes, undoubtedly remain to be 

 discovered. 



Branchiobdella Bavenelii Diesing. Plate XVIII, fig. 89. (p. 458.) 



Sitzungsberichte der kais. Akad. der Wissenschaften, Wien, xxxiii, p. 482, 1859. 

 Phyllobranchus Bavenelii Girard, Proceedings of the American Association for 

 the Advancement of Science for 1850, vol. iv, p. 124, 1851. (?) Branchellion 

 OrMniensis Quatrefages, Annals des sci. natur., se"r. 3, vol. xviii, pp. 279-325, 

 Plate 6, figs. 1-13, PL 7-8, 1852 (anatomy). 



In describing this species Mr. Girard mistook the anterior for the 

 posterior end, and described the large posterior sucker, or acetabulum, 

 as the head. The color is dark brown, purplish, or dark violaceous, 

 specked with white. 



Vineyard Sound, on a stingray {Myliobatis Freminvillei), in several 

 instances; a number usually occurred together. Charleston, South 

 Carolina, on a " skate," species unknown (Girard). Atlantic Ocean, on 

 a torpedo (Quatrefages). 



Cystobranchus vividus Verrill. (p. 458.) 



American Journal of Science and Arts, ser. 3, vol. iii, p. 126, fig. 1, 1872. 



New Haven, on the minnow (Fundulus pisculentus), both in fresh and 

 brackish water ; November and December. 



Ichthyobdella FiTNDULi Verrill. (p. 458.) 



American Journal of Science and Arts, loc. cit., p. 126. 

 New Haven, on Fundulus pisculenhis, with the last. 



