4 c Canadian Arctic Expedition, 1913-18 



"Station 41.^;, C.A.E. On just dead Coitus scorpius L. Bernard harbour, 

 Northwest Territories. End of August, 1915. F. Johansen, coll." Four 

 small ones. 



"Station 42w, C.A.E. On just dead Coitus scorpius L. Bernard harbour. 

 Northwest Territories. Dark purple. F. Johansen, coll." Three full grown 

 specimens. 



"Station 49g, C.A.E. On skin of dead Coitus scorpius L. Bernard harbour, 

 Northwest Territories. Junp 15, 1916. F. Johansen, coll." Twelve st>ecimens 

 of various sizes. 



Oxytonostoma typica Malm. 



A single specimen having exactly the appearance of Malm's figure of 

 Pontobdella granulifera with which this species is probably identical. 



Length 22-5 mm., maximum width (behind middle) 4 mm. The bod}'' is 

 strongly fusiform and in the posterior region slightly flattened but strictly 

 terete anteriorly. JMuch enlarged caudad of the middle and tapered to the 

 very narrow anterior region which immediately behind the oral disc measures 

 only one-tenth of the greatest diameter. Posteriorly it tapers less, the width 

 at the anus being about one-fourth of the maximum. Oral sucker small and 

 very deeply cupped. No eyes. Caudal sucker neither deeplj^ concave nor 

 strongly expanded, being about one-half the maximum diameter. 



Somites in the middle region are strongly marked, as though the body 

 cavity were extensively developed and subdivided by disseppiments, as in 

 earthworms. Twelve such are very distinct but the constrictions fade out 

 toward the caudal end. There is here no trace of annulation. In the slender 

 anterior region the somites are less distinct but there is some trace of annulation 

 which extends onto the head also. On the ventral surface of the anterior half 

 of the posterior region are six pairs of rather conspicuous, low, rounded elevations 

 situated just behind the constrictions. In the center of each appears a small 

 orifice (nepridiopore?). 



The integument presents a peculiar shiny surface as though covered by a 

 thick cuticle like a tapeworm on which no papillae, granules or sensillse are 

 visible. It is of a dirty brown jsh color, stained dark purple or slaty at the 

 shght constrictions. The peculiar appearance is probably due to the stretching 

 of the integuments as a result of extreme gorging of the digestive tract with 

 blood. 



"Station 41, C.A.E. Bernard harbour. Northwest Territories. 3-5 

 fathoms. July 20, 1915 (dark purple). F. Johansen, coll." One specimen. 



Platybdella sj). 



The Victoria ^Memorial Museum at Ottawa also contains a fish leech from 

 the Neptune Expedition. It is poorly jDreserved and cannot be determined 

 by me. 



Length 13-5 mm., width at middle 1-4 mm., diameter of caudal sucker 

 1-5 mm. No ej^es. Caudal sucker prominent, thin and repand. No eye-spots. 

 Somite appear to be triannulate with traces of the secondary furrows. 



"From Sclerocrangon boreas (Phipps). Neptune Exp. 1903-04." 



