392 A. JE. Verrill — Marine Nemerteans of Nev; England, etc. 



Ann ; off Cape Cod, etc., in 4 to 150 fathoms ; and in the Gulf of 

 St. Lawrence, 15 fathoms. 



This large and conspicuous species is generally easily recognized 

 by its clear, dark purplish or chocolate-brown color above, with pale 

 margins and a trapezoidal or triangular white spot on each side of 

 the head, and usually with a narrow white line across the neck ; and 

 by the pinkish or flesh-colored lower surface. Ocelli in two or more 

 rows in an elongated group on each antero-lateral margin of the 

 head, and a pair of small sub-dorsal clusters on the transverse white 

 nuchal band. 



The Planaria angulata of Otho Fabricius was, without doubt, 

 based on this species ; but his description being ver}^ brief, writers 

 have hesitated in regard to this identification. His description of 

 the characteristic white angular spots on the head, the color, and the 

 habits could, however, apply to no other known species. The re- 

 discovery of this species on the coast of Greenland by Levinsen, and 

 its abundance in Cumberland Gulf, renders it quite certain that 

 Fabricius had this species before him. Hence I have considered it 

 necessary to restore his name. 



This species and some of the others herein described, e. g. A. fron- 

 talis, evidently belong to the group for which Dr. Stimpson insti- 

 tuted the genus Cosmocephala. Among the characters given, the 

 clusters of ocelli are said to be arranged on the antero-lateral mar- 

 gins of the head. The cerebral clusters may, perhaps, have been 

 ovei'looked in at least one species. Dr. Stimpson has described two 

 North Pacific species that are evidently closely allied to A. angula- 

 tus, viz : 



Amphiporus Beringianus {Cosniocejjhala Beringiana St.) This 

 was dredged in Bering Straits, in 5 fathoms. It closely resembles a 

 light-colored variety of A. angnlatiis and may be identical with it. 



Amphiporus Japoiiicus (^Cosmocephala Japonica St.) was from 

 Simoda, Japan, low water, among rocks. It differs more from our 

 species than does the preceding. It is brown above, with a pale 

 median line, with irregular pale spots on the head, and triangular 

 cervical spots of white ; clusters of ocelli are antero-lateral.* 



* Prodromus, in Proc. Phil. Acad. Nat. Sci., ix, p. 165, 1857. The extensive col- 

 lections of invertebrates made by Dr. Stimpson on the North Pacific Kxploring Expe- 

 dition were nearly all destroyed in the great Chicago fire by which the Museum of the 

 Chicago Academy of Science was burned. His original notes and drawings were 

 burned at the same time. His colored figures of the Turbellaria and Xemerteans, 

 which I had the pleasure of examining not long before the fire, were numerous and 

 excellent. Had he been able to publish his figures subsequent writers would have 

 found it easy to identify his new genera and species, briefly described in the Prodromus. 



