NEMERTINI ADDENDA AND CORRIGENDA 195 



revision of the family in which it is found (ix). Contributions to the develop- 

 ment have been made by Coe (ii) and Wilson (xii). 



(i) Bergendal. (Callinera and Gononemertes.) Zool. Anz. 1900. 

 (ii) Coe. Early Development. Zool. Jahr. 12 Bd. 1899. 

 (iii) Coe. (Anatomy and Parapolia.) Trans. Connect. Acad. 1895 

 (iv) Coe. (Paranemertes.} Proc. Wash. Acad. 1901. 

 (v) Montgomery. (Nervous System.) Journ. Morph. vol. xiii. 1897. 

 (vi) Ibid. (Connect. Tiss.) Zool. Jahr. Abh. Anat. 10 Bd. 1897. 

 (vii) Punnett. (Anatomy.) Quart. Journ. Mic. Sc. vol. xliv. 1900. 

 (viii) Ibid. (Carinesta.) Willey's Zool. Results, pt. v. 1900. 

 (ix) Ibid. (Micrella and Oxypolia.) Quart. Journ. Mic. Sc. vol. xliv. 1901. 

 (x) Staub. (Lineopsis.) Semon's Forschungsreisen, 5 Bd. 1900. 

 (xi) Thompson. (Zygeupolia.) Zool. Anz. 1900. 

 (xii) Wilson. (Habits and Development.) Quart. Journ. Mic. Sc. vol. xliii. 1900. 



P. 163 (a). Mention should be made of the oesophageal (or buccal) nerves which 

 occur throughout the group. 



(j3). In spite of what has been often written to the contrary it is exceed- 

 ingly probable that in most cases, if not all, the blood-vessels are 

 destitute of muscle fibrils ; and that the blood is kept in circulation 

 by the waves of contraction passing over the body wall. 



(7). The transverse connections are always dorsal to the gut. 



(r5). The gonads may open on the ventral surface within the area between 

 the lateral nerve cords. 



P. 168 (a). Hubrecht states that in Linens gesserensis the excretory system arises 

 as an out-pouching from the endodermal portion of the alimentary 

 canal. 



P. 173 (a). Drepanophorus is characteristically tropical and sub-tropical. Cere- 

 bratulus is just as much tropical and temperate as arctic. 



P. 173 (a). The "tail" differs in structure. The alimentary canal does not 

 necessarily extend into it. 



P. 176 (a). The "retractor" end of the proboscis is not always attached. 



P. 178 (a). The largest number of stylet sacs yet met with in an Amphiporus is 

 twelve. 



P. 182 (a). The median dorsal nerve cord in the Heteronemerteans is situated 

 below the cutis and outer longitudinal muscle layer. 



P. 187 (a). "Head gland" is the term more frequently used here ( = Germ. 

 Kopf druse], 



P. 189. The great majority of the species of Ampliiporus possess only one pair 

 of excretory ducts. 



