2S 



General Dislrlbution : — The species has a very wide range, 

 being known from the east coast of North America between 

 35° N. and 41° N. (Smith), from Davis Straits, the west, south- 

 west, and south of Iceland* (Hansen), from the Bay of Biscay 

 (Caullery), Senegal (Bouvier), north-east of the Cape of Good 

 Hope (Stebbing), and from the west coast of America between 

 0° 31' S., and 7° 30' N. (Faxon). 



Irish Distribution : — The Helga has taken this species at one 

 station only, and in the same haul there were several specimens 

 of P. sculptus. 



Helga : — 



S. R. 944—17 V '10.-51° 22' N., 12° 41' W., 982 fms., ooze. 

 Shrimp Trawl. — Three, 74-52 mm. 



Vertical Distribution : — This species inhabits, as a rule, deeper 

 water than P. sculpfus. The greatest depth at which it has been 

 taken is 1917 fms. (Smith), and the least, 355 fms. (Caullery). 

 It appears to occur most commonly in about 800-1200 fms. 



Polycheles granulatus, Faxon. 



PI. Ill, figs. 1-11. 



Polycheles granulatus, Faxon, 1893. 

 Pentacheles Beaumontii, x\lcock, 1894. 

 Pentacheles Beaumontii, " Investigator," 1894. 

 Polycheles granulatus, Faxon, 1895. 

 Pentacheles Beaumontii, Alcock, 1901. 

 Polycheles dubius, Bouvier, 1905 {b). 

 Polycheles eryoniformis, Bouvier, 1905 (c). 

 ? Polycheles Beaumontii, Stebbing, 1908. 



This species differs from all the others taken by the Helga 

 in the very great breadth of the carapace, in the granular surface 

 of the latter, and in the poverty of the armature of spines. 



The orbital sinuses are fairly narrow, and there is a spine at 

 both the outer and the inner angle of each. The spine at the 

 antero-lateral angle of the carapace is very long and sharp. 

 There are two rostral spines. The edges of the carapace are 

 convex ; the spines with which they are furnished do not, as 

 in the other species, diminish in size posteriorly ; on the contrary, 

 the last spines are as large as those in front. There are from seven 

 to ten in front, three in the centre, and from twelve to fifteen 

 behind the cervical groove. In the posterior half the edges of 

 the carapace are tilted upwards. The cervical groove is not 

 well marked, its anterior branch in particular being very in- 

 distinct, and there are no spines placed along it. There is no 

 curved row of spines behind the orbit. The carina on the border 



♦lain indebted to Dr. Stephensrn of the Copenhagen University Museum 

 for the information that all Hansen's specimens of P. nanus possess the spine 

 at the inner angle of the orbital sinus, which is the distinguishing character 

 of the variety Grimaldii, Bouvier. 



